Deciphering Audi Fault Codes List: A Guide for Audi Owners

Audi vehicles are renowned for their performance and advanced technology, but like any complex machinery, they can encounter issues from time to time. When something goes wrong, the onboard diagnostic system generates fault codes, providing valuable insights into the problem. In this comprehensive guide, we will dive deep into Audi fault codes list. We’ll uncover their meanings, explore troubleshooting strategies, and learn how to prevent them.

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*Please press the following to search through the Audi fault codes list: CTRL+ F

Audi Fault Codes List
Trouble Code	Fault Location	Probable Cause
P1000 – P1099 (Fuel and air metering and auxiliary emission control)
P1009	Air Mass Meter 1/2 Implausible Signal From Load Detection	Wiring, MAF sensor(s)
P1018	Intake Manifold Runner Bank 2 Lower Limit Not Reached
P1020	Fuel pressure – control limit exceeded	Wiring, fuel pressure sensor, fuel pressure control valve, high pressure fuel pump
P1023	Fuel pressure control valve – short to ground	Wiring short to ground, fuel pressure control valve
P1024	Fuel pressure control valve – open circuit	Wiring open circuit, fuel pressure control valve
P1025	Fuel pressure control valve – mechanical fault	Fuel pressure control valve
P1026	Intake manifold air control solenoid – short to positive	Wiring short to positive, intake manifold air control solenoid
P1027	Intake manifold air control solenoid – short to ground	Wiring short to ground, intake manifold air control solenoid
P1028	Intake manifold air control solenoid – open circuit	Wiring open circuit, intake manifold air control solenoid
P1029	Intake manifold air control valve position sensor – upper limit not reached	Air control flap tight/sticking, hose connection(s), intake manifold air control actuator
P1030	Intake manifold air control valve position sensor – lower limit not reached	Air control flap tight/sticking, hose connection(s), intake manifold air control actuator
P1031	Intake manifold air control valve position sensor – specification not attained	Air control flap tight/sticking, hose connection(s), intake manifold air control actuator, intake manifold air control solenoid
P1032	Nitrogen oxides (NOx) sensor – signal too high	Catalytic converter, wiring short to positive, NOx sensor
P1033	Nitrogen oxides (NOx) sensor – signal too low	Exhaust leak, wiring short to ground, NOx sensor
P1034	Nitrogen oxides (NOx) sensor – signal outside tolerance	Catalytic converter, exhaust leak, wiring, NOx sensor
P1035	Nitrogen oxides (NOx) sensor – range/performance problem	Wiring, heating inoperative, NOx sensor
P1036	Nitrogen oxides (NOx) heater sensor – short to positive	Wiring short to positive, NOx sensor
P1037	Nitrogen oxides (NOx) heater sensor – short to ground	Wiring short to ground, NOx sensor
P1038	Nitrogen oxides (NOx) heater sensor – open circuit	Wiring open circuit, NOx sensor
P1039	Injector 1, supply voltage – short circuit	Wiring, injector
P1040	Injector 1, supply voltage – circuit malfunction	Wiring, injector
P1041	Injector 2, supply voltage – short circuit	Wiring, injector
P1042	Injector 2, supply voltage – circuit malfunction	Wiring, injector
P1043	Injector 3, supply voltage – short circuit	Wiring, injector
P1044	Injector 3, supply voltage – circuit malfunction	Wiring, injector
P1045	Injector 4, supply voltage – short circuit	Wiring, injector
P1046	Injector 4, supply voltage – circuit malfunction	Wiring, injector
P1047	Camshaft position (CMP) actuator, exhaust/ right/rear, Bank 1 – circuit malfunction	Wiring, camshaft position (CMP) actuator
P1048	Camshaft position (CMP) actuator, exhaust/ right/rear, Bank 1 – short to positive	Wiring short to positive, camshaft position (CMP) actuator
P1049	Camshaft position (CMP) actuator, exhaust/ right/rear, Bank 1 – short to ground	Wiring short to ground, camshaft position (CMP) actuator
P1050	Camshaft position (CMP) actuator, exhaust/ right/rear, Bank 1 – open circuit	Wiring open circuit, camshaft position (CMP) actuator
P1055	Bank 1 Camshaft Adjustment Short To B+	Wiring short to positive, camshaft position (CMP) actuator
P1056	Bank 1 Camshaft Adjustment Short To Ground	Wiring short to ground, camshaft position (CMP) actuator
P1057	Bank 1 Camshaft Adjustment Short To Open Circuit	Wiring open circuit, camshaft position (CMP) actuator
P1063	Fuel pressure – control limit not reached	Air in fuel system, fuel leak, fuel lift pump, fuel bypass valve, fuel pressure control valve, high pressure fuel pump
P1064	Fuel pressure – mechanical fault	Air in fuel system, fuel leak, fuel lift pump, fuel bypass valve, fuel pressure control valve, high pressure fuel pump
P1065	Fuel pressure – system deviation	Air in fuel system, fuel leak, fuel lift pump, fuel bypass valve, fuel pressure control valve, high pressure fuel pump
P1066	Intake manifold air control solenoid – short to positive	Wiring short to positive, intake manifold air control solenoid
P1067	Intake manifold air control solenoid – short to ground	Wiring short to ground, intake manifold air control solenoid
P1068	Intake manifold air control solenoid – open circuit	Wiring open circuit, intake manifold air control solenoid
P1069	Nitrogen oxides (NOx) sensor – heater control – short to ground	Wiring short to ground, NOx sensor
P1070	Nitrogen oxides (NOx) sensor – heater control – short to positive	Wiring short to positive, NOx sensor
P1071	Nitrogen oxides (NOx) sensor – heater control – incorrect signal	Wiring, NOx sensor
P1072	Nitrogen oxides (NOx) sensor – heater control – circuit malfunction	Wiring, NOx sensor
P1073	Mass Air Flow Sensor 2 Signal Too Small	Wiring, MAF sensor(s)
P1074	Mass Air Flow Sensor 2 Signal Too Large	Wiring, MAF sensor(s)
P1081	Exhaust Bank 3- Mixture Adaption Range 1 Lower Lean Limit Not Reached	Wiring, H02S
P1082	Exhaust Bank 3- Mixture Adaption Range 2 Lower Lean Limit Not Reached	Wiring, H02S
P1083	Exhaust Bank 3- Mixture Adaption Range 1 Lower Rich Limit Not Reached	Wiring, intake leak, H02S
P1084	Exhaust Bank 3- Mixture Adaption Range 2 Lower Rich Limit Not Reached	Wiring, intake leak, H02S
P1085	Exhaust Bank 4- Mixture Adaption Range 1 Lower Lean Limit Not Reached	Wiring, H02S
P1086	Exhaust Bank 4- Mixture Adaption Range 2 Lower Lean Limit Not Reached	Wiring, H02S
P1087	Exhaust Bank 4- Mixture Adaption Range 1 Lower Rich Limit Not Reached	Wiring, intake leak, H02S
P1088	Exhaust Bank 4- Mixture Adaption Range 2 Lower Rich Limit Not Reached	Wiring, intake leak, H02S
P1093	Mixture control (MC), Bank 1 – malfunction	Fuel pressure/pump, injector(s) intake leak
P1100 – P1199 (Fuel and air metering)
P1100	HO2S12 Sensor Circuit Voltage Too Low Air Leak
P1101	Heated oxygen sensor (HO2S) 1, Bank 1 – low voltage/air leak	Intake/exhaust leak, fuel pressure/pump, wiring short to ground, HO2S
P1102	Heated oxygen sensor (HO2S) 1, Bank 1 – heater short to positive	Wiring short to positive, HO2S
P1103	Heated oxygen sensor (HO2S) 1, Bank 1 – heater output too low	Wiring, HO2S
P1104	HO2S12 Sensor Circuit Voltage Too Low Air Leak	Wiring, air leak, H02S
P1105	Heated oxygen sensor (HO2S) 2, Bank 1 – heater short to positive	Wiring short to positive, HO2S
P1106	Heated oxygen sensor (HO2S) 1, Bank 2 – low voltage/air leak	Intake/exhaust leak, fuel pressure/pump, wiring short to ground, HO2S
P1107	Heated oxygen sensor (HO2S) 1, Bank 2 – heater short to positive	Wiring short to positive, HO2S
P1109	HO2S22 Sensor Circuit Voltage Too Low Air Leak	Wiring, air leak, H02S
P1110	Heated oxygen sensor (HO2S) 2, Bank 2 – heater short to positive	Wiring short to positive, HO2S
P1111	Heated oxygen sensor (HO2S) control, Bank 1 – system too lean	Intake/exhaust leak, injector blocked, MAP sensor, MAF sensor, fuel pressure/ pump, HO2S
P1112	Heated oxygen sensor (HO2S) control, Bank 1 – system too rich	Excessive fuel in engine oil, injector leaking, fuel pressure, EVAP canister purge valve, MAP sensor, MAF sensor, HO2S
P1113	Heated oxygen sensor (HO2S) 1, Bank 1 – heater resistance too high	Wiring, HO2S
P1114	Heated oxygen sensor (HO2S) 2, Bank 1 – heater resistance too high	Wiring, HO2S
P1115	Heated oxygen sensor (HO2S) 1, Bank 1 – heater short to ground	Wiring short to ground, HO2S
P1116	Heated oxygen sensor (HO2S) 1, Bank 1 – heater open circuit	Wiring open circuit, HO2S
P1117	Heated oxygen sensor (HO2S) 2, Bank 1 – heater short to ground	Wiring short to ground, HO2S
P1118	Heated oxygen sensor (HO2S) 2, Bank 1 – heater open circuit	Wiring open circuit, HO2S
P1119	Heated oxygen sensor (HO2S) 1, Bank 2 – heater short to ground	Wiring short to ground, HO2S
P1120	Heated oxygen sensor (HO2S) 1, Bank 2 – heater open circuit	Wiring open circuit, HO2S
P1121	Heated oxygen sensor (HO2S) 2, Bank 2 – heater short to ground	Wiring short to ground, HO2S
P1122	Heated oxygen sensor (HO2S) 2, Bank 2 – heater open circuit	Wiring open circuit, HO2S
P1123	Long Term Fuel Trim Adjustment Bank 1 System Too Rich	Excessive fuel in engine oil, fuel pressure, EVAP canister purge valve, injector(s)
P1124	Long Term Fuel Trim Adjustment Bank 1 System Too Lean	Fuel pressurelpump, injector(s), intakelexhaust leak, AIR system, hose leak
P1125	Long Term Fuel Trim Adjustment Bank 2 System Too Rich	Excessive fuel in engine oil, fuel pressure, EVAP canister purge valve, injector(s)
P1126	Long Term Fuel Trim Adjustment Bank 2 System Too Lean	Fuel pressure/pump, injector(s), intake/exhaust leak, AIR system, hose leak
P1127	Long term fuel trim, entire speed/load range, Bank 1 – system too rich	Excessive fuel in engine oil, fuel pressure, EVAP canister purge valve, injector(s)
P1128	Long term fuel trim, entire speed/load range, Bank 1 – system too lean	Fuel pressure/pump, injector(s), intake/ exhaust leak, AIR system, hose leak
P1129	Long term fuel trim, entire speed/load range, Bank 2 – system too rich	Excessive fuel in engine oil, fuel pressure, EVAP canister purge valve, injector(s)
P1130	Long term fuel trim, entire speed/load range, Bank 2 – system too lean	Fuel pressure/pump, injector(s), intake/ exhaust leak, AIR system, hose leak
P1131	Heated oxygen sensor (HO2S) 1, Bank 1 – heater resistance too high	Wiring, HO2S
P1132	Heated oxygen sensor (HO2S) 1, Bank 1 & 2 – heater control – circuit high	Wiring short to positive, HO2S
P1133	Heated oxygen sensor (HO2S) 1, Bank 1 & 2 – heater control – circuit low	Wiring open circuit/short to ground, HO2S
P1134	HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Short To B+	Wiring short to positive, H02S
P1135	HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction	Wiring open circuit/short to ground, H02S
P1136	Long term fuel trim, idling, Bank 1 – system too lean	Fuel pressure/pump, injector(s), intake/ exhaust leak, AIR system, hose leak
P1137	Long term fuel trim, idling, Bank 1 – system too rich	Fuel pressure, injector(s), EVAP canister purge valve
P1138	Long term fuel trim, idling, Bank 2 – system too lean	Fuel pressure/pump, injector(s), intake/ exhaust leak, AIR system, hose leak
P1139	Long term fuel trim, idling, Bank 2 – system too rich	Fuel pressure, injector(s), EVAP canister purge valve
P1140	Heated oxygen sensor (HO2S) 2, Bank 2 – heater resistance too high	Wiring, HO2S
P1141	Load calculation – implausible value	Wiring, MAP sensor, MAF sensor
P1142	Load calculation – too low	Throttle control unit, MAP sensor, MAF sensor, APP sensor
P1143	Load calculation – too high	Throttle control unit, MAP sensor, MAF sensor, APP sensor
P1144	Mass air flow (MAF) sensor, Bank 1 – open circuit/short to ground	Wiring open circuit/short to ground, MAF sensor
P1145	Mass air flow (MAF) sensor, Bank 1 – short to positive	Wiring short to positive, MAF sensor
P1146	Mass air flow (MAF) sensor, Bank 1 – supply voltage	Operating voltage too high/low, wiring
P1147	Heated oxygen sensor (HO2S) 1, Bank 2 – lambda regulation, system too lean	Intake leak, wiring, HO2S
P1148	Heated oxygen sensor (HO2S) 1, Bank 2 – lambda regulation, system too rich	Exhaust leak, wiring, HO2S
P1149	Heated oxygen sensor (HO2S) 1, Bank 1 – implausible lambda control value	Exhaust leak, wiring, HO2S
P1150	Heated oxygen sensor (HO2S) 1, Bank 2 – implausible lambda control value	Exhaust leak, wiring, HO2S
P1151	Long term fuel trim 1, Bank 1 – below lean limit	Fuel pressure/pump, injectors, intake/exhaust leak, HO2S
P1152	Long term fuel trim 2, Bank 1 – below lean limit	Fuel pressure/pump, injectors, intake/exhaust leak, AIR system, HO2S
P1153	Heated oxygen sensor (HO2S) 2, Bank 1 & 2 – interchanged	HO2S 2 on Bank 1 & 2 incorrectly installed
P1154	Manifold Switch Over Malfunction	Wiring, actuator, mechanical fault, ECM
P1155	Manifold absolute pressure (MAP) sensor – short to positive	Wiring short to positive, MAP sensor
P1156	Manifold absolute pressure (MAP) sensor – open circuit/short to ground	Wiring open circuit/short to ground, MAP sensor
P1157	Manifold absolute pressure (MAP) sensor – supply voltage	Wiring, MAP sensor
P1158	Manifold absolute pressure (MAP) sensor – range/performance problem	Wiring, hose connection(s), MAP sensor
P1159	Mass air flow (MAF) sensor, Bank 1 & 2 – implausible ratio	EGR system, intake leak, wiring, MAF sensor 1/2
P1160	Intake air temperature (IAT) sensor – short to ground	Wiring short to ground, IAT sensor
P1161	Intake air temperature (IAT) sensor – open circuit/short to positive	Wiring open circuit/short to positive, IAT sensor
P1162	Fuel temperature sensor – short to ground	Wiring short to ground, fuel temperature sensor
P1163	Fuel temperature sensor – open circuit/short to positive	Wiring open circuit/short to positive, fuel temperature sensor
P1164	Fuel temperature sensor – range/performance problem	Wiring, fuel temperature sensor
P1165	Long term fuel trim 1, Bank 1 – above rich limit	Fuel pressure/pump, injectors, EVAP canister purge valve, EGR system, HO2S, intake/exhaust system
P1166	Long term fuel trim 2, Bank 1 – above rich limit	Fuel pressure/pump, injectors, EVAP canister purge valve, EGR system, HO2S, intake/exhaust system
P1167	Mass air flow (MAF) sensor, Bank 2 – range/performance problem	Intake leak, wiring, MAF sensor
P1168	Mass air flow (MAF) sensor, Bank 2 – low input	Intake leak, air filter blocked, wiring short to ground, fuse, MAF sensor
P1169	Mass air flow (MAF) sensor, Bank 2 – high input	Wiring short to positive, ground wire defective, MAF sensor
P1170	Mass air flow (MAF) sensor, Bank 2 – supply voltage	Wiring, fuse, engine control relay, injector
P1171	Throttle motor position sensor 2 – range/performance problem	Wiring, throttle valve tight/sticking, throttle motor position sensor
P1172	Throttle motor position sensor 2 – low input	Wiring short to ground, throttle motor position sensor
P1173	Throttle motor position sensor 2 – high input	Wiring short to positive, throttle motor position sensor
P1174	Fuel measurement system, Bank 1 – injection timing incorrect	Fuel pressure/pump, injector(s), intake/exhaust leak, EGR system, EVAP canister purge valve, HO2S
P1176	Lambda correction after catalyst, Bank 1 – control limit reached	Intake leak, HO2S
P1177	Lambda correction after catalyst, Bank 2 – control limit reached	Intake leak, HO2S
P1178	Heated oxygen sensor (HO2S) 1, Bank 1, pump current – open circuit	Wiring open circuit, HO2S
P1179	Heated oxygen sensor (HO2S) 1, Bank 1, pump current – short to ground	Wiring short to ground, HO2S
P1180	Heated oxygen sensor (HO2S) 1, Bank 1, pump current – short to positive	Wiring short to positive, HO2S
P1181	Heated oxygen sensor (HO2S) 1, Bank 1, reference voltage – open circuit	Wiring open circuit, HO2S, HT leads, spark plugs, misfire detection
P1182	Heated oxygen sensor (HO2S) 1, Bank 1, reference voltage – short to ground	Wiring short to ground, HO2S, HT leads, spark plugs, misfire detection
P1183	Heated oxygen sensor (HO2S) 1, Bank 1, reference voltage – short to positive	Wiring short to positive, HO2S, HT leads, spark plugs, misfire detection
P1184	Linear Oxygen Sensor Common Ground Open Circuit	Wiring open circuit, H02S
P1185	Linear Oxygen Sensor Common Ground Short To Ground	Wiring open circuit, H02S
P1186	Linear Oxygen Sensor Common Ground Short To Positive	Wiring open circuit, H02S
P1187	Heated oxygen sensor (HO2S) 1, Bank 1 or 2 – circuit malfunction	Wiring, HO2S
P1188	Linear O2 Sensor Compensation Resistor Short to Ground	Wiring, HO2S
P1189	Linear O2 Sensor Compensation Resistor Short to B+	Wiring, HO2S
P1190	Heated oxygen sensor (HO2S) 1, Bank 1, reference voltage – range/performance problem	Wiring, HO2S, HT leads, spark plugs, misfire detection
P1191	Heated oxygen sensor (HO2S) 1, Bank 1 & 2 – interchanged	HO2S 1 on banks 1 & 2 incorrectly installed
P1192	Fuel pressure sensor – supply voltage	Wiring, fuel pressure sensor
P1193	Fuel pressure sensor – open circuit/ short to positive	Wiring open circuit/short to positive
P1194	Fuel pressure control valve – short to positive	Wiring short to positive, fuel pressure control valve
P1195	Fuel pressure control valve – open circuit/short to ground	Wiring open circuit/short to ground, fuel pressure control valve
P1196	Heated oxygen sensor (HO2S) 1, Bank 1, heater circuit malfunction	Wiring, HO2S
P1197	Heated oxygen sensor (HO2S) 1, Bank 2, heater circuit malfunction	Wiring, HO2S
P1198	Heated oxygen sensor (HO2S) 2, Bank 1, heater circuit malfunction	Wiring, HO2S
P1199	Heated oxygen sensor (HO2S) 2, Bank 2, heater circuit malfunction	Wiring, HO2S
P1200 – P1299 (Fuel and air metering – injector circuit)
P1200	Turbocharger Recirculating Valve Mechanical Malfunction
P1201	Injector 1 – circuit malfunction	Wiring, injector
P1202	Injector 2 – circuit malfunction	Wiring, injector
P1203	Injector 3 – circuit malfunction	Wiring, injector
P1204	Injector 4 – circuit malfunction	Wiring, injector
P1205	Injector 5 – circuit malfunction	Wiring, injector
P1206	Injector 6 – circuit malfunction	Wiring, injector
P1207	Injector 7 – circuit malfunction	Wiring, injector
P1208	Injector 8 – circuit malfunction	Wiring, injector
P1209	Intake Valves For Cylinder Shut Off Short Circuit To Ground	Wiring short to ground, valve controller
P1210	Intake Valves For Cylinder Shut Off Short to B+	Wiring short to positive, valve controller
P1211	Intake Valves For Cylinder Shut Off Open Circuit	Wiring open circuit, valve controller
P1213	Injector 1 – short to positive	Wiring short to positive, injector
P1214	Injector 2 – short to positive	Wiring short to positive, injector
P1215	Injector 3 – short to positive	Wiring short to positive, injector
P1216	Injector 4 – short to positive	Wiring short to positive, injector
P1217	Injector 5 – short to positive	Wiring short to positive, injector
P1218	Injector 6 – short to positive	Wiring short to positive, injector
P1219	Injector 7 – short to positive	Wiring short to positive, injector
P1220	Injector 8 – short to positive	Wiring short to positive, injector
P1221	Cylinder Shut Off Exhaust Valves Short Circuit To Ground	Wiring short to ground, valve controller
P1222	Cylinder Shut Off Exhaust Valves Short To B+	Wiring short to positive, valve controller
P1223	Cylinder Shut Off Exhaust Valves Open Circuit	Wiring open circuit, valve controller
P1225	Injector 1 – short to ground	Wiring short to ground, injector
P1226	Injector 2 – short to ground	Wiring short to ground, injector
P1227	Injector 3 – short to ground	Wiring short to ground, injector
P1228	Injector 4 – short to ground	Wiring short to ground, injector
P1229	Injector 5 – short to ground	Wiring short to ground, injector
P1230	Injector 6 – short to ground	Wiring short to ground, injector
P1231	Injector 7 – short to ground	Wiring short to ground, injector
P1232	Injector 8 – short to ground	Wiring short to ground, injector
P1237	Injector 1 – open circuit	Wiring open circuit, injector
P1238	Injector 2 – open circuit	Wiring open circuit, injector
P1239	Injector 3 – open circuit	Wiring open circuit, injector
P1240	Injector 4 – open circuit	Wiring open circuit, injector
P1241	Injector 5 – open circuit	Wiring open circuit, injector
P1242	Injector 6 – open circuit	Wiring open circuit, injector
P1243	Injector 7 – open circuit	Wiring open circuit, injector
P1244	Injector 8 – open circuit	Wiring open circuit, injector
P1245	Injector needle lift sensor – short to ground	Wiring short to ground, injector needle lift sensor
P1246	Injector needle lift sensor – range/performance problem	Injector needle lift sensor, injector pipe defective, fuel level low
P1247	Injector needle lift sensor – open circuit/short to positive	Wiring open circuit/short to positive, injector needle lift sensor
P1248	Start of injection – control difference	Fuel injection timing solenoid, injector needle lift sensor, fuel level low, pump timing
P1249	Fuel Consumption Signal Electrical Fault In Circuit	Wiring, fuel tank level sensor, ECM
P1250	Fuel tank level sensor – low input	Fuel level too low
P1251	Fuel injection timing solenoid – short to positive	Wiring short to positive
P1252	Fuel injection timing solenoid – open circuit/short to ground	Wiring open circuit/short to ground, fuel injection timing solenoid
P1253	Instrument panel, fuel consumption signal – short to ground	Wiring short to ground, instrument panel
P1254	Instrument panel, fuel consumption signal – short to positive	Wiring short to positive, instrument panel
P1255	Engine coolant temperature (ECT) sensor – short to ground	Wiring short to ground, ECT sensor
P1256	Engine coolant temperature (ECT) sensor – open circuit/short to positive	Wiring open circuit/short to positive, ECT sensor
P1257	Engine Coolant System Valve Open	Wiring open circuit, valve
P1258	Engine Coolant System Valve Short To B+	Wiring short to positive, valve
P1259	Engine Coolant System Valve Short To Ground	Wiring short to ground, valve
P1260	Injector 1 – implausible signal	No control
P1261	Injector 1 – control limit exceeded	Control period too long, wiring, injector
P1262	Injector 1 – control limit not reached	Control period too short, fuel level low, air in fuel system
P1263	Injector 2 – implausible signal	No control
P1264	Injector 2 – control limit exceeded	Control period too long, wiring, injector
P1265	Injector 2 – control limit not reached	Control period too short, fuel level low, air in fuel system
P1266	Injector 3 – implausible signal	No control
P1267	Injector 3 – control limit exceeded	Control period too long, wiring, injector
P1268	Injector 3 – control limit not reached	Control period too short, fuel level low, air in fuel system
P1269	Injector 4 – implausible signal	No control
P1270	Injector 4 – control limit exceeded	Control period too long, wiring, injector
P1271	Injector 4 – control limit not reached	Control period too short, fuel level low, air in fuel system
P1278	Fuel metering solenoid – short to positive	Wiring short to positive, fuel metering solenoid
P1279	Fuel metering solenoid – open circuit/short to ground	Wiring open circuit/short to ground, fuel metering solenoid
P1281	Fuel metering solenoid – short to ground	Wiring short to ground, fuel metering solenoid
P1282	Fuel metering solenoid – open circuit	Wiring open circuit, fuel metering solenoid
P1285	Fuel Injection Air Control Valve Circuit Short To Ground	Wiring, valve/solenoid
P1287	Turbocharger (TC) bypass valve – open circuit	Wiring open circuit, TC bypass valve
P1288	Turbocharger (TC) bypass valve – short to positive	Wiring short to positive, TC bypass valve
P1289	Turbocharger (TC) bypass valve – short to ground	Wiring short to ground, TC bypass valve
P1290	Engine coolant temperature (ECT) sensor, ECM controlled cooling system – high input	Wiring, ECT sensor
P1291	Engine coolant temperature (ECT) sensor, ECM controlled cooling system – high input	Wiring, ECT sensor
P1292	Engine coolant thermostat – open circuit	Wiring open circuit, engine coolant thermostat
P1293	Engine coolant thermostat – short to positive	Wiring short to positive, engine coolant thermostat
P1294	Engine coolant thermostat – short to ground	Wiring short to ground, engine coolant thermostat
P1295	Turbocharger (TC), bypass – flow malfunction	TC wastegate regulating valve, hose connection(s), injector
P1296	Engine cooling system – malfunction	ECT sensor, coolant thermostat
P1297	Turbocharger (TC)/throttle valve, hose connection – pressure loss	Hose connection
P1299	Fuel metering solenoid – circuit malfunction	Wiring, fuel metering solenoid
P1300 – P1399 (Ignition system or misfire)
P1300	Random/multiple cylinder(s) – misfire detected	Fuel level low, fuel gauge tank sensor
P1320	Knock Sensor 2 Circuit Short To Ground	Wiring, KS, ECM
P1321	Knock Sensor 3 Signal Too Low	Wiring, KS, ECM
P1322	Knock Sensor 3 Signal Too High	KS incorrectly tightened
P1323	Knock Sensor 4 Signal Too Low	Wiring, KS, ECM
P1324	Knock Sensor 4 Signal Too Low	KS incorrectly tightened
P1325	Knock control, cylinder 1 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1326	Knock control, cylinder 2 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1327	Knock control, cylinder 3 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1328	Knock control, cylinder 4 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1329	Knock control, cylinder 5 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1330	Knock control, cylinder 6 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1331	Knock control, cylinder 7 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1332	Knock control, cylinder 8 – control limit reached	Poor quality fuel, incorrect fuel, insecure engine component, KS incorrectly tightened/defective, shield wiring open circuit, poor connection
P1335	Engine torque control – limit reached	Throttle control unit, hose(s), TC system, MAP sensor, IAT sensor, MAF sensor, ECT sensor
P1336	Engine torque monitoring – control limit exceeded	Hose(s), TC system, throttle control unit, IAT sensor, MAP sensor, MAF sensor, ECT sensor, APP sensor
P1337	Camshaft position (CMP) sensor, Bank 1 – short to ground	Wiring short to ground, CMP sensor
P1338	Camshaft position (CMP) sensor, Bank 1 – open circuit/short to positive	Wiring open circuit/short to positive, CMP sensor
P1339	Crankshaft position (CKP) sensor/ engine speed (RPM) sensor – interchanged	Multi-plugs incorrectly connected
P1340	Camshaft position (CMP) sensor 1/Bank 1/ crankshaft position (CKP) sensor – out of sequence	Valve timing, CKP/CMP sensor installation, CKP sensor rotor
P1341	Ignition amplifier, primary circuit 1 – short to ground	Wiring short to ground, ignition amplifier, CMP sensor, HT leads, spark plugs
P1342	Ignition amplifier, primary circuit 1 – short to positive	Wiring short to positive, ignition amplifier, CMP sensor, HT leads, spark plugs
P1343	Ignition amplifier, primary circuit 2 – short to ground	Wiring short to ground, ignition amplifier, CMP sensor, HT leads, spark plugs
P1344	Ignition amplifier, primary circuit 2 – short to positive	Wiring short to positive, ignition amplifier, CMP sensor, HT leads, spark plugs
P1345	Ignition amplifier, primary circuit 3 – short to ground	Wiring short to ground, ignition amplifier, CMP sensor, HT leads, spark plugs
P1346	Ignition amplifier, primary circuit 3 – short to positive	Wiring short to positive, ignition amplifier, CMP sensor, HT leads, spark plugs
P1347	Camshaft position (CMP) sensor 2/Bank 2/ crankshaft position (CKP) sensor – out of sequence	Valve timing, CKP/CMP sensor installation, CKP sensor rotor
P1348	Ignition amplifier, primary circuit 1 – open circuit	Wiring short to ground, ignition amplifier, CMP sensor, HT leads, spark plugs
P1349	Ignition amplifier, primary circuit 2 – open circuit	Wiring short to positive, ignition amplifier, CMP sensor, HT leads, spark plugs
P1350	Ignition amplifier, primary circuit 3 – open circuit	Wiring short to positive, ignition amplifier, CMP sensor, HT leads, spark plugs
P1351	Camshaft position (CMP) sensor, Bank 1 – range/performance problem	Ignore trouble code, erase fault memory
P1354	Fuel quantity adjuster position sensor	Wiring, fuel injection pump
P1355	Ignition coil/amplifier, cylinder 1 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1356	Ignition coil/amplifier, cylinder 1 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1357	Ignition coil/amplifier, cylinder 1 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1358	Ignition coil/amplifier, cylinder 2 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1359	Ignition coil/amplifier, cylinder 2 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1360	Ignition coil/amplifier, cylinder 2 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1361	Ignition coil/amplifier, cylinder 3 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1362	Ignition coil/amplifier, cylinder 3 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1363	Ignition coil/amplifier, cylinder 3 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1364	Ignition coil/amplifier, cylinder 4 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1365	Ignition coil/amplifier, cylinder 4 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1366	Ignition coil/amplifier, cylinder 4 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1367	Ignition coil/amplifier, cylinder 5 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1368	Ignition coil/amplifier, cylinder 5 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1369	Ignition coil/amplifier, cylinder 5 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1370	Ignition coil/amplifier, cylinder 6 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1371	Ignition coil/amplifier, cylinder 6 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1372	Ignition coil/amplifier, cylinder 6 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1373	Ignition coil/amplifier, cylinder 7 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1374	Ignition coil/amplifier, cylinder 7 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1375	Ignition coil/amplifier, cylinder 7 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1376	Ignition coil/amplifier, cylinder 8 – open circuit	Wiring open circuit, ignition coil/ amplifier
P1377	Ignition coil/amplifier, cylinder 8 – short to positive	Wiring short to positive, ignition coil/ amplifier
P1378	Ignition coil/amplifier, cylinder 8 – short to ground	Wiring short to ground, ignition coil/ amplifier
P1385	Engine control module (ECM) – defective	ECM
P1386	Engine control module (ECM), knock control – defective	ECM
P1387	Engine control module (ECM), BARO sensor – defective	ECM
P1388	Engine control module (ECM), ETS – defective	ECM
P1389	Engine control module (ECM) 2 – defective	ECM
P1391	Camshaft position (CMP) sensor 2/ Bank 2 – short to ground	Wiring short to ground, CMP sensor
P1392	Camshaft position (CMP) sensor 2/ Bank 2 – open circuit/short to positive	Wiring open circuit/short to positive, CMP sensor
P1393	Ignition amplifier, primary circuit 1 – circuit malfunction	Wiring, ignition amplifier, HT leads, spark plugs
P1394	Ignition amplifier, primary circuit 2 – circuit malfunction	Wiring, ignition amplifier, HT leads, spark plugs
P1395	Ignition amplifier, primary circuit 3 – circuit malfunction	Wiring, ignition amplifier, HT leads, spark plugs
P1397	Crankshaft position (CKP) sensor/engine speed (RPM) sensor – control limit reached	Insecure/damaged rotor, CKP/RPM sensor
P1398	Crankshaft position (CKP) sensor/engine speed (RPM) sensor – short to ground	Wiring short to ground, CKP/RPM sensor
P1399	Crankshaft position (CKP) sensor/engine speed (RPM) sensor – short to positive	Wiring short to positive, CKP/RPM sensor
P1400 – P1499 (Emission control)
P1400	Exhaust gas recirculation (EGR) valve/solenoid, Bank 1 – circuit malfunction	Wiring, EGR valve
P1401	Exhaust gas recirculation (EGR) valve/solenoid, Bank 1 – short to ground	Wiring short to ground, EGR valve
P1402	Exhaust gas recirculation (EGR) valve/solenoid, Bank 1 – short to positive	Wiring short to positive, EGR valve/ solenoid
P1403	Exhaust gas recirculation (EGR) system – control difference	Basic setting not carried out, EGR system
P1404	Exhaust gas recirculation (EGR) system – basic setting	Basic setting not carried out, EGR system
P1406	EGR Temperature Sensor Signal Range Performance	Wiring, EGRT sensor, ECM
P1407	Exhaust gas recirculation temperature (EGRT) sensor – low input	Wiring short to ground, EGRT sensor
P1408	Exhaust gas recirculation temperature (EGRT) sensor – high input	Wiring short to positive, ground wire defective, EGRT sensor
P1409	Evaporative emission (EVAP) canister purge valve – circuit malfunction	Wiring, EVAP canister purge valve
P1410	Evaporative emission (EVAP) canister purge valve – short to positive	Wiring short to positive, EVAP canister purge valve
P1411	Secondary air injection (AIR) system, Bank 2 – insufficient flow detected	Intake leak, hose(s) blocked/leaking, AIR valve/solenoid
P1412	EGR Differential Pressure Sensor Signal Too Low	Wiring, EGR sensor, ECM
P1413	EGR Differential Pressure Sensor Signal Too High	Wiring, EGR sensor, ECM
P1414	Secondary air injection (AIR) system, Bank 2 – leak detected	Intake leak, hose(s) leaking, AIR valve/solenoid
P1415	Exhaust gas recirculation (EGR) valve position sensor – lower limit exceeded	Basic setting not carried out
P1416	Exhaust gas recirculation (EGR) valve position sensor – upper limit exceeded	Basic setting not carried out
P1417	Fuel Level Sensor Circuit Signal Too Low	Wiring, fuel level sensor, ECM
P1418	Fuel Level Sensor Circuit Signal Too High	Wiring, fuel level sensor, ECM
P1420	Secondary air injection (AIR) valve/solenoid – circuit malfunction	Wiring, AIR solenoid
P1421	Secondary air injection (AIR) valve/solenoid – short to ground	Wiring short to ground, AIR valve/ solenoid
P1422	Secondary air injection (AIR) valve/solenoid – short to positive	Wiring short to positive, AIR valve/ solenoid
P1423	Secondary air injection (AIR) system, Bank 1 – insufficient flow detected	Hose connection(s), AIR valve/solenoid
P1424	Secondary air injection (AIR) system, Bank 1 – leak detected	AIR valve, exhaust leak
P1425	Evaporative emission (EVAP) canister purge valve – short to ground	Wiring short to ground, EVAP canister purge valve
P1426	Evaporative emission (EVAP) canister purge valve – open circuit	Wiring open circuit, EVAP canister purge valve
P1427	Vacuum pump, brakes – short to positive	Wiring short to positive, vacuum pump
P1428	Vacuum pump, brakes – short to ground	Wiring short to ground, vacuum pump
P1429	Vacuum pump, brakes – open circuit	Wiring open circuit, vacuum pump
P1430	Vacuum pump, brakes – open circuit/ short to positive	Wiring open circuit/short to positive, vacuum pump
P1431	Vacuum pump, brakes – open circuit/ short to ground	Wiring open circuit/short to ground, vacuum pump
P1432	Secondary air injection (AIR) valve/solenoid – open circuit	Wiring open circuit, fuse, AIR valve/ solenoid
P1433	Secondary air injection (AIR) pump relay – open circuit	Wiring open circuit, fuse, AIR pump relay
P1434	Secondary air injection (AIR) pump relay – short to positive	Wiring short to positive, AIR pump relay
P1435	Secondary air injection (AIR) pump relay – short to ground	Wiring short to ground, AIR pump relay
P1436	Secondary air injection (AIR) pump relay – circuit malfunction	Wiring, AIR pump relay
P1437	Exhaust gas recirculation (EGR) valve/solenoid, Bank 2 – short to positive	Wiring short to positive, EGR valve/ solenoid
P1438	Exhaust gas recirculation (EGR) valve/solenoid, Bank 2 – open circuit/short to ground	Wiring open circuit/short to ground, EGR valve/solenoid
P1439	Exhaust gas recirculation (EGR) valve position sensor – basic setting	Basic setting not carried out, EGR system
P1440	Exhaust gas recirculation (EGR) valve – open circuit	Wiring open circuit, EGR valve
P1441	Exhaust gas recirculation (EGR) valve/solenoid, Bank 1 – open circuit/short to ground	Wiring open circuit/short to ground, EGR solenoid
P1442	Exhaust gas recirculation (EGR) valve position sensor – high input	Wiring short to positive, EGR valve position sensor
P1443	Exhaust gas recirculation (EGR) valve position sensor – low input	Wiring short to ground, EGR valve position sensor
P1444	Exhaust gas recirculation (EGR) valve position sensor – range/performance problem	Wiring, EGR valve position sensor
P1445	Catalyst Temperature Sensor 2 Circuit Range/Performance	Wiring, temperature sensor, ECM
P1446	Catalyst Temperature Circuit Short To Ground	Wiring short to ground, temperature sensor, ECM
P1447	Catalyst Temperature Circuit Open/Short to B+	Wiring short to positive, temperature sensor, ECM
P1448	Catalyst Temperature Sensor 2 Circuit Short to Ground	Wiring short to ground, temperature sensor, ECM
P1449	Catalyst Temperature Sensor 2 Circuit Open/Short to B+	Wiring open/short to positive, temperature sensor, ECM
P1450	Secondary air injection (AIR) system – short to positive	Wiring short to positive, AIR relay
P1451	Secondary air injection (AIR) system – short to ground	Wiring short to ground, AIR relay
P1452	Secondary air injection (AIR) system – open circuit	Wiring open circuit, AIR relay
P1453	Exhaust gas recirculation temperature (EGRT) sensor 1/Bank 1 – open circuit/short to positive	Wiring open circuit/short to positive, EGRT sensor
P1454	Exhaust gas recirculation temperature (EGRT) sensor 1/Bank 1 – short to ground	Wiring short to ground, EGRT sensor
P1455	Exhaust gas recirculation temperature (EGRT) sensor 1/Bank 1 – range/performance problem	Exhaust leak, wiring, EGRT sensor
P1456	Exhaust gas recirculation temperature (EGRT) control, Bank 1 – control limit reached	EGRT sensor
P1457	Exhaust gas recirculation temperature (EGRT) sensor 2/Bank 2 – open circuit/short to positive	Wiring open circuit/short to positive, EGRT sensor
P1458	Exhaust gas recirculation temperature (EGRT) sensor 2/Bank 2 – short to ground	Wiring short to ground, EGRT sensor
P1459	Exhaust gas recirculation temperature (EGRT) sensor 2/Bank 2 – range/performance problem	Exhaust leak, wiring, EGRT sensor
P1460	Exhaust gas recirculation temperature (EGRT) control, Bank 2 – control limit reached	EGRT sensor
P1461	Exhaust gas recirculation temperature (EGRT) control, Bank 1 – range/performance problem	Exhaust leak/blockage, EGRT sensor
P1462	Exhaust gas recirculation temperature (EGRT) control, Bank 2 – range/performance problem	Exhaust leak/blockage, EGRT sensor
P1465	Additive Pump Short Circuit to B+	Wiring short to positive, fuel additive pump, ECM
P1466	Additive Pump Open/Short to Ground	Wiring open/short to ground, fuel additive pump, ECM
P1467	EVAP Canister Purge Solenoid Valve Short Circuit to B+	Wiring short to positive, EVAP canister purge valve
P1468	EVAP Canister Purge Solenoid Valve Short Circuit to Ground	Wiring short to ground, EVAP canister purge valve
P1469	EVAP Canister Purge Solenoid Valve Open Circuit	Wiring open circuit, EVAP canister purge valve
P1470	EVAP Control System LDP Circuit Electrical Malfunction	Wiring, EVAP leak detection pump
P1471	EVAP Control System LDP Circuit Short to Positive	Wiring short to positive, EVAP leak detection pump
P1472	EVAP Control System LDP Circuit Short To Ground	Wiring short to ground, EVAP leak detection pump
P1473	EVAP Control System LDP Open Circuit	Wiring, EVAP purge valve, ECM
P1474	EVAP Canister Purge Solenoid Valve Electrical Malfunction	Wiring, hose leak/blockage, EVAP canister purge valve, EVAP canister, EVAP leak detection pump
P1475	EVAP Control System LDP Malfunction/Signal Circuit Open	Wiring, EVAP canister purge valve, EVAP leak detection pump, ECM
P1476	EVAP Control System LDP Malfunction/Insufficient Vacuum	System leak, hose blockage, EVAP canister, EVAP leak detection pump
P1477	EVAP Control System LDP Malfunction	Wiring, hose leak/blockage, EVAP canister purge valve, EVAP canister, EVAP leak detection pump
P1478	EVAP Control System LDP Clamped Tube Detected	Hose blockage
P1479	Vacuum system, brakes – mechanical fault	Vacuum pump
P1482	Secondary Air Injection Pump Relay 2 Short To B+	Wiring, AIR pump relay
P1483	Secondary Air Injection Pump Relay 2 Short To Ground	Wiring, AIR pump relay
P1484	Secondary Air Injection Pump Relay 2 Electrical Circuit Malfunction	Wiring, AIR pump relay, ECM
P1489	EVAP Canister Purge Regulator Valve 2 Short To B+	Wiring, EVAP canister purge valve, ECM
P1490	EVAP Canister Purge Regulator Valve 2 Short To Ground	Wiring, EVAP canister purge valve, ECM
P1491	EVAP Canister Purge Regulator Valve 2 Open Circuit	Wiring, EVAP canister purge valve, ECM
P1493	Low Pressure Pump For Brake Power Too Low
P1494	EVAP canister purge valve 2 – incorrect flow detected	Wiring, hoses blocked/disconnected/ split, EVAP canister purge valve, ECM
P1497	Secondary Air System Bank 3 Flow Fault	AIR pump relay, AIR switching valve, AIR solenoid(s), AIR pump(s), ECM
P1500 – P1599 (Vehicle or idle speed control)
P1500	Fuel pump relay – circuit malfunction	Wiring, fuel pump relay
P1501	Fuel pump relay – short to ground	Wiring short to ground, fuel pump relay
P1502	Fuel pump relay – short to positive	Wiring short to positive, fuel pump relay
P1503	Alternator load signal	Wiring, alternator
P1504	Intake system – leak detected	Intake leak, EGR system, EVAP system, hose connection(s), throttle control unit
P1505	Closed throttle position (CTP) switch – does not close	Throttle cable/valve, wiring open circuit/ short to positive, CTP switch adjustment/defective, ECM
P1506	Closed throttle position (CTP) switch – does not open	Moisture ingress, wiring short to ground, CTP switch adjustment/defective, ECM
P1507	Idle speed control (ISC) – lower limit reached	Throttle control unit/basic setting, intake/exhaust leak, mechanical fault, AC signals
P1508	Idle speed control (ISC) – upper limit reached	Throttle control unit/basic setting, intake/exhaust leak, mechanical fault, AC signals
P1509	Idle air control (IAC) valve – circuit malfunction	Wiring, IAC valve
P1510	Idle air control (IAC) valve – short to positive	Wiring open circuit/short to positive, IAC valve
P1511	Intake manifold air control solenoid 1 – current circuit	Wiring, intake manifold air control solenoid
P1512	Intake manifold air control solenoid 1 – short to positive	Wiring short to positive, intake manifold air control solenoid
P1513	Intake manifold air control solenoid 2 – short to positive	Wiring short to positive, intake manifold air control solenoid
P1514	Intake manifold air control solenoid 2 – short to ground	Wiring short to ground, intake manifold air control solenoid
P1515	Intake manifold air control solenoid 1 – short to ground	Wiring short to ground, intake manifold air control solenoid
P1516	Intake manifold air control solenoid 1 – open circuit	Wiring open circuit, intake manifold air control solenoid
P1517	Engine control relay – circuit malfunction	Wiring, engine control relay
P1518	Engine control relay – short to positive	Wiring short to positive, engine control relay
P1519	Camshaft position (CMP) control, Bank 1 – malfunction	Cylinder head oil pressure too low, CMP actuator sticking/defective
P1520	Intake manifold air control solenoid 2 – open circuit	Wiring open circuit, intake manifold air control solenoid
P1521	Intake Manifold Changeover Valve 2 Circuit Electrical Malfunction	Wiring, intake manifold air control solenoid
P1522	Camshaft position (CMP) control, Bank 2 – malfunction	Cylinder head oil pressure too low, CMP actuator sticking/defective
P1523	SRS crash signal received	Airbag triggered
P1524	Fuel pump relay – open circuit/short to ground	Wiring open circuit/short to ground, fuel pump relay
P1525	Camshaft position (CMP) actuator, Bank 1 – circuit malfunction	Wiring, CMP actuator
P1526	Camshaft position (CMP) actuator, Bank 1 – short to positive	Wiring short to positive, CMP actuator
P1527	Camshaft position (CMP) actuator, Bank 1 – short to ground	Wiring short to ground, CMP actuator
P1528	Camshaft position (CMP) actuator, Bank 1 – open circuit	Wiring open circuit, CMP actuator
P1529	Camshaft position (CMP) actuator – short to positive	Wiring short to positive, CMP actuator
P1530	Camshaft position (CMP) actuator – short to ground	Wiring short to ground, CMP actuator
P1531	Camshaft position (CMP) actuator – open circuit	Wiring open circuit, CMP actuator
P1532	Idle control – lean running speed below specification	Throttle control unit
P1533	Camshaft position (CMP) actuator, Bank 2 – circuit malfunction	Wiring, CMP actuator
P1534	Camshaft position (CMP) actuator, Bank 2 – short to positive	Wiring short to positive, CMP actuator
P1535	Camshaft position (CMP) actuator, Bank 2 – short to ground	Wiring short to ground, CMP actuator
P1536	Camshaft position (CMP) actuator, Bank 2 – open circuit	Wiring open circuit, CMP actuator
P1537	Fuel shut-off solenoid – malfunction	Fuel shut-off solenoid (leaking/sticking)
P1538	Fuel shut-off solenoid – open circuit/short to ground	Wiring open circuit/short to ground, fuel shut-off solenoid
P1539	Clutch pedal position (CPP) switch – range/performance problem	Wiring, CPP switch
P1540	Vehicle speed signal – high input	Excessive vehicle speed, instrument panel defective
P1541	Fuel pump relay – open circuit	Wiring open circuit, fuel pump relay
P1542	Throttle motor position sensor 1 – range/performance problem	Throttle valve requires cleaning, wiring, throttle motor position sensor
P1543	Throttle motor position sensor 1 – low input	Wiring short to ground, throttle motor position sensor
P1544	Throttle motor position sensor 1 – high input	Wiring short to positive, throttle motor position sensor
P1545	Throttle valve control – malfunction	Throttle valve tight/sticking, wiring, throttle control unit
P1546	Turbocharger (TC) wastegate regulating valve – short to positive	Wiring short to positive, TC wastegate regulating valve
P1547	Turbocharger (TC) wastegate regulating valve – short to ground	Wiring short to ground, TC wastegate regulating valve
P1548	Turbocharger (TC) wastegate regulating valve – open circuit	Wiring open circuit, TC wastegate regulating valve
P1549	Turbocharger (TC) wastegate regulating valve – open circuit/short to ground	Wiring open circuit/short to ground, TC wastegate regulating valve
P1550	Turbocharger (TC) pressure – control difference	Intake/exhaust leak, hoses interchanged/ not connected, MAP sensor, TC wastegate regulating valve, turbocharger (TC) wastegate actuator, TC
P1551	Barometric Pressure Sensor Circuit Short to B+	Wiring, BARO sensor
P1552	Barometric Pressure Sensor Circuit Open/Short to Ground	Wiring, BARO sensor
P1553	Manifold absolute pressure (MAP) sensor/ barometric pressure (BARO) sensor – range/performance problem	Intake/exhaust leak, EGR system, EVAP canister purge valve, throttle control unit, wiring, MAP sensor, BARO sensor
P1554	Throttle control unit – basic setting conditions	Basic setting conditions not met
P1555	Turbocharger (TC) pressure – upper limit exceeded	Hoses interchanged/not connected, TC wastegate regulating valve, turbocharger (TC) wastegate actuator, TC
P1556	Turbocharger (TC) pressure – control limit not reached	TC wastegate regulating valve, intake leak, TC defective
P1557	Turbocharger (TC) pressure – control limit exceeded	Hose connection interchanged/not connected
P1558	Idle speed control (ISC) actuator/throttle motor – circuit malfunction	Wiring, ISC actuator/throttle motor
P1559	Throttle control unit – basic setting malfunction	Accelerator pedal or starter motor operated during basic setting
P1560	Maximum engine RPM exceeded	Incorrect gear shift, wiring open circuit, CKP/RPM sensor
P1561	Fuel quantity adjuster – control difference	Wiring, fuel injection pump
P1562	Fuel quantity adjuster – upper stop value	Fuel quantity adjuster blocked/defective, stop value reached
P1563	Fuel quantity adjuster – lower stop value	Fuel quantity adjuster blocked/defective, lower stop value reached
P1564	Throttle control unit – voltage low during basic setting	Battery, wiring
P1565	Throttle control unit – lower stop not reached	Throttle valve tight/sticking, ISC actuator
P1566	AC compressor, load signal – implausible signal	Wiring, AC system
P1567	Load Signal from A/C Compressor No Signal	Wiring, AC system
P1568	Throttle control unit – mechanical fault	Throttle valve tight/sticking
P1569	Cruise control master switch	Wiring, cruise control master switch
P1570	Engine control module (ECM) – immobilizer active	Incorrect/damaged key, incorrectly coded, ECM/immobilizer replacement without coding, wiring, immobilizer defective
P1571	Engine mounting control solenoid, Bank 2 – short to positive	Wiring short to positive, engine mounting control solenoid
P1572	Engine mounting control solenoid, Bank 2 – short to ground	Wiring short to ground, engine mounting control solenoid
P1573	Engine mounting control solenoid, Bank 2 – open circuit	Wiring open circuit, engine mounting control solenoid
P1575	Engine mounting control solenoid, Bank 1 – short to positive	Wiring short to positive, engine mounting control solenoid
P1576	Engine mounting control solenoid, Bank 1 – short to ground	Wiring short to ground, engine mounting control solenoid
P1577	Engine mounting control solenoid, Bank 1 – open circuit	Wiring open circuit, engine mounting control solenoid
P1579	Throttle control unit – basic setting	Basic setting not carried out
P1580	Throttle motor, Bank 1 – circuit malfunction	Wiring, throttle motor
P1581	Throttle control unit – basic setting	Basic setting not carried out
P1582	Idle speed adaptation – limit reached	Intake/exhaust leak, AIR system, fuel pressure/pump, injector(s), EVAP canister purge valve
P1586	Engine mounting control solenoid, Bank 1 & 2 – short to positive	Wiring short to positive, engine mounting control solenoid
P1589	AC/heater air temperature control switch – short to ground	Wiring short to ground, AC/heater air temperature control switch
P1590	AC/heater air temperature control switch – open circuit	Wiring open circuit, AC/heater air temperature control switch
P1592	Barometric pressure (BARO) sensor/manifold absolute pressure (MAP) sensor – implausible ratio	TC system, MAP sensor
P1593	Altitude adoption – signal outside tolerance	Intake leak, MAF sensor, throttle control unit
P1599	Idle control – lean running speed above specification	IAC valve
P1600 – P1699 (ECM – computer output circuit)
P1600	Engine control module (ECM) – supply voltage low from ignition switch	Battery, alternator, wiring open circuit
P1601	Engine control module (ECM) – supply voltage	Wiring, engine control relay
P1602	Engine control module (ECM) – supply voltage low from battery	Battery was disconnected, battery discharged, alternator, wiring open circuit, fuse
P1603	Engine control module (ECM) – defective	ECM
P1604	Engine control module (ECM) – defective	ECM
P1606	Rough road signal – circuit malfunction	ABS control module trouble code(s) stored, CAN data bus
P1608	Power steering pressure (PSP) switch – circuit malfunction	Wiring, PSP switch
P1609	Engine control module (ECM) – crash switch-off triggered	Airbag triggered
P1610	Engine control module (ECM) – defective	ECM
P1611	Malfunction indicator lamp (MIL) – short to ground	Wiring short to ground
P1612	Engine control module (ECM) – coding	Incorrectly coded
P1613	Malfunction indicator lamp (MIL) – open circuit/short to positive	Wiring open circuit/short to positive
P1615	Engine oil temperature (EOT) sensor – range/performance problem	Engine oil level, wiring, EOT sensor
P1616	Glow plug warning lamp – short to positive	Wiring short to positive
P1617	Glow plug warning lamp – open circuit/short to ground	Bulb, wiring open circuit/short to ground
P1618	Glow plug relay – short to positive	Wiring short to positive, glow plug relay
P1619	Glow plug relay – open circuit/short to ground	Wiring open circuit/short to ground, glow plug relay
P1620	Instrument panel, ECT signal – open circuit/short to positive	Wiring open circuit/short to positive, instrument panel
P1621	Instrument panel, ECT signal – short to ground	Wiring short to ground, instrument panel
P1622	Instrument panel, ECT signal – implausible signal	Wiring, instrument panel, ECT sensor
P1623	CAN data bus – no signal	Trouble code(s) stored in other system(s), wiring, matching resistor in ECM
P1624	Malfunction indicator lamp (MIL) – request signal active	Trouble code(s) stored in other system(s)
P1625	CAN data bus, TCM – incorrect signal	TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM
P1626	CAN data bus, TCM – no signal	TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM
P1629	CAN data bus, cruise control – no signal	Cruise control trouble code(s) stored, wiring, matching resistor in ECM
P1630	Accelerator pedal position (APP) sensor 1 – low input	Wiring short to ground, APP sensor
P1631	Accelerator pedal position (APP) sensor 1 – high input	Wiring short to positive, APP sensor
P1632	Accelerator pedal position (APP) sensor – supply voltage	Operating voltage too high/low, wiring
P1633	Accelerator pedal position (APP) sensor 2 – low input	Wiring short to ground, APP sensor
P1634	Accelerator pedal position (APP) sensor 2 – high input	Wiring short to positive, APP sensor
P1635	CAN data bus, AC – no signal	AC control module trouble code(s) stored, wiring, matching resistor in ECM
P1636	CAN data bus, SRS – no signal	SRS control module trouble code(s) stored, wiring, matching resistor in ECM
P1637	CAN data bus, electronic CE – no signal	Trouble code(s) stored, wiring, matching resistor in ECM
P1639	Accelerator pedal position (APP) sensor 1/2 – range/performance problem	Wiring, APP sensor
P1640	Engine control module (ECM) – defective	ECM
P1642	SRS control module – system malfunction	Trouble code(s) stored
P1645	CAN data bus, 4WD – no signal	4WD trouble code(s) stored, wiring, matching resistor in ECM
P1648	CAN data bus – defective	Wiring, matching resistor in ECM
P1649	CAN data bus, ABS – no signal	ABS control module trouble code(s) stored, wiring, matching resistor in ECM
P1650	CAN data bus, instrumentation – no signal	Instrumentation control module trouble code(s) stored, wiring, matching resistor in ECM
P1652	Transmission control module (TCM) – system malfunction	Trouble code(s) stored
P1653	ABS control module – system malfunction	Trouble code(s) stored
P1654	Instrumentation control module – system malfunction	Trouble code stored for engine oil level/ temperature sensor
P1656	AC signal – short to ground	Wiring short to ground
P1657	AC signal – short to positive	Wiring
P1658	CAN data bus, cruise control – incorrect signal	Cruise control trouble code(s) stored, wiring, matching resistor in ECM
P1659	Engine coolant blower motor, speed 1 – short to positive	Wiring short to positive, engine coolant blower motor
P1660	Engine coolant blower motor, speed 1 – short to ground	Wiring short to ground, engine coolant blower motor
P1661	Engine coolant blower motor, speed 2 – short to positive	Wiring short to positive, engine coolant blower motor
P1662	Engine coolant blower motor, speed 2 – short to ground	Wiring short to ground, engine coolant blower motor
P1663	Injector, activation – short to positive	Wiring short to positive, ECM
P1664	Injector, activation – current circuit	Wiring open circuit/short to ground
P1665	Injector – mechanical fault	Injector
P1666	Injector 1 – current circuit	Wiring open circuit/short to ground
P1667	Injector 2 – current circuit	Wiring open circuit/short to ground
P1668	Injector 3 – current circuit	Wiring open circuit/short to ground
P1669	Injector 4 – current circuit	Wiring open circuit/short to ground
P1672	Engine coolant blower motor, speed 1 – open circuit/short to ground	Wiring open circuit/short to ground
P1674	CAN data bus, instrumentation – incorrect signal	Wiring, instrumentation control module trouble code(s) stored, matching resistor in ECM
P1676	ETS warning lamp – circuit malfunction	Instrumentation control module trouble code(s) stored, wiring, matching resistor in ECM
P1677	ETS warning lamp – short to positive	Instrumentation control module trouble code(s) stored, wiring short to positive, matching resistor in ECM
P1678	ETS warning lamp – short to ground	Instrumentation control module trouble code(s) stored, wiring short to ground, matching resistor in ECM
P1679	ETS warning lamp – open circuit	Instrumentation control module trouble code(s) stored, wiring open circuit, matching resistor in ECM
P1680	Limp-home mode – active	Throttle control unit, APP sensor
P1681	Engine control module (ECM) – programming incomplete	ECM
P1682	CAN data bus, ABS – implausible signal	ABS control module trouble code(s) stored, wiring, matching resistor in ECM
P1683	CAN data bus, SRS – implausible signal	SRS control module trouble code(s) stored, wiring, matching resistor in ECM
P1690	Malfunction indicator lamp (MIL) – circuit malfunction	Instrumentation control module trouble code(s) stored, wiring, matching resistor in ECM
P1691	Malfunction indicator lamp (MIL) – open circuit	Instrumentation control module trouble code(s) stored, wiring open circuit, matching resistor in ECM
P1692	Malfunction indicator lamp (MIL) – short to ground	Instrumentation control module trouble code(s) stored, wiring short to ground, matching resistor in ECM
P1693	Malfunction indicator lamp (MIL) – short to positive	Instrumentation control module trouble code(s) stored, wiring short to positive, matching resistor in ECM
P1696	CAN data bus, steering column electronics – incorrect signal	Wiring, matching resistor in ECM
P1698	Check DTC Memory Of Steering Column ECU	Steering column control module trouble code(s) stored
P1699	Engine control module (ECM) – programmed for cruise control	Erase cruise control program
P1700 – P1799 (Transmission)
P1740	Clutch Temperature Monitoring
P1745	Solenoid valves, supply voltage – short to positive	Wiring open circuit/short to positive, poor connection, TCM
P1746	TCM/solenoid valves, supply voltage – circuit malfunction	Wiring, battery, alternator
P1747	Solenoid valves, supply voltage – open circuit/short to ground	Battery, wiring open circuit/short to ground, poor connection, TCM
P1748	Transmission control module (TCM) – defective	TCM
P1750	Transmission control module (TCM) – supply voltage low	Fuse, wiring, TCM
P1751	Transmission control module (TCM) – supply voltage high	Wiring, alternator, battery(s)
P1800 – P1899 (Transmission)
P1851	CAN data bus, ABS – incorrect signal	ABS trouble code(s) stored, wiring, matching resistor in ECM
P1853	CAN data bus, ABS – incorrect signal	ABS trouble code(s) stored, wiring, matching resistor in ECM
P1854	CAN data bus, ABS – defective	ABS trouble code(s) stored, wiring, matching resistor in ECM
P1857	Load Signal Error Message From ECU	Vacuum leak, intake system – air leak
P1900 – P1999 (Transmission)
P1900	Engine coolant blower motor, speed 2 – open circuit/short to ground	Wiring open circuit/short to ground, engine coolant blower motor
P1901	Engine coolant blower motor run-on relay – short to positive	Wiring short to positive, engine coolant blower motor run-on relay
P1902	Engine coolant blower motor run-on relay – open circuit/short to ground	Wiring open circuit/short to ground, engine coolant blower motor run-on relay
P1903	Engine coolant hydraulic blower motor solenoid – short to positive	Wiring short to positive, engine coolant hydraulic blower motor solenoid
P1904	Engine coolant hydraulic blower motor solenoid – open circuit/short to ground	Wiring open circuit/short to ground, engine coolant hydraulic blower motor solenoid
P1905	Charge air coolant pump relay – short to positive	Wiring short to positive, charge air coolant pump relay
P1906	Charge air coolant pump relay – open circuit/short to ground	Wiring open circuit/short to ground, charge air coolant pump relay
P1907	Data bus, ECM 1/2 – defective	Wiring
P1908	Data bus, ECM 1/2 – software version monitoring	Data in ECM 1 & ECM 2 does not match
P1909	Data bus, ECM 1/2 – no signal from ECM 1	Wiring, ECM 1
P1910	Data bus, ECM 1/2 – no signal from ECM 2	Wiring, ECM 2
P1911	Data bus, ECM 1/2 – circuit malfunction	Wiring, ECM 1/2
P1912	Brake servo pressure sensor – open circuit/short to positive	Wiring open circuit/short to positive, brake servo pressure sensor
P1913	Brake servo pressure sensor – short to ground	Wiring short to ground, brake servo pressure sensor
P1914	Brake servo pressure sensor – range/performance problem	Vacuum leak, wiring, brake servo pressure sensor
P1920	Engine mounting control solenoid, Bank 1 & 2 – open circuit/short to ground	Wiring open circuit/short to ground, engine mounting control solenoid
P1923	Engine control module (ECM) 2 – malfunction	Trouble code(s) stored
P1951	Radiator Fan 2 Movement Restricted / Jammed
P1952	Turbocharger Control Module 1 Defective
P1953	Turbocharger Control Module 2 Defective
P1996	Friction Too High Intake Camshaft Adjustment Bank 1	Implausible signal, mechanical fault
P1997	Friction Too High Exhaust Camshaft Adjustment Bank 1	Implausible signal, mechanical fault
P1998	Friction Too High Intake Camshaft Adjustment Bank 2	Implausible signal, mechanical fault
P1999	Friction Too High Exhaust Camshaft Adjustment Bank 2	Implausible signal, mechanical fault

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Understanding Audi Fault Codes List

Audi vehicles are equipped with an onboard diagnostic (OBD) system that monitors various components and systems. When an issue arises, this system generates fault codes, alphanumeric combinations that represent specific problems detected in the vehicle.

Common Audi Fault Codes and Their Meanings

Fault Code 101 – Engine Misfire

One of the most common Audi fault codes is Code 101, which often indicates an engine misfire. This can be caused by issues such as faulty spark plugs, fuel delivery problems, or a malfunctioning ignition coil.

Fault Code 202 – Oxygen Sensor Malfunction

Code 202 points to a malfunctioning oxygen sensor. The oxygen sensor plays a crucial role in monitoring the air-fuel mixture in the exhaust system. A malfunction can lead to decreased fuel efficiency and increased emissions.

Fault Code 303 – Transmission Fluid Temperature High

Code 303 is related to the transmission system and suggests that the transmission fluid temperature has exceeded safe levels. This can be caused by issues with the transmission cooler or overheating of the transmission itself.

How to Interpret Audi Fault Codes List

Interpreting Audi fault codes involves deciphering the alphanumeric sequence and understanding their meanings. The letters often indicate the system or component affected, while the numbers provide specific details about the issue. A comprehensive OBD code reader or a professional mechanic can help with accurate interpretation.

Troubleshooting and Resolving Audi Fault Codes

DIY Fixes for Minor Faults

Some Audi fault codes may have straightforward solutions, such as loose connectors or minor sensor issues. Before seeking professional help, consider checking for these common culprits and addressing them.

Seeking Professional Assistance

For complex or recurring fault codes, it’s advisable to consult a professional mechanic or an authorized Audi service center. They possess the expertise and diagnostic tools needed to pinpoint and resolve intricate issues accurately.

Preventing Audi Fault Codes

Prevention is often the best strategy when dealing with Audi fault codes. Regular maintenance, including oil changes, filter replacements, and adherence to manufacturer-recommended service intervals, can significantly reduce the likelihood of fault codes.

The Importance of Regular Maintenance

Routine maintenance not only prevents fault codes but also ensures the longevity and optimal performance of your Audi vehicle. By following a proactive maintenance schedule, you can avoid costly repairs and unexpected breakdowns.

Unleashing Efficiency: The 30 Min DPF Clean Advantage

When it comes to the complexities of heavy machinery, particularly dealing with intricate fault codes on your Audi equipment, the task can be quite overwhelming. But worry not! There’s a shining beacon of hope on the horizon, and it answers to the name of 30 Min DPF Clean. We offer unparalleled Diesel Particulate Filter (DPF) cleaning services across New Jersey, Philadelphia, and Delaware, setting us apart from the competition. Curious about why you should entrust us with ensuring the seamless operation of your machinery? Let’s delve into the answer.

30 Min DPF Clean: Your All-in-One Solution

What truly distinguishes 30 Min DPF Clean is our holistic approach to machinery maintenance. We don’t limit ourselves to DPF cleaning; we specialize in a comprehensive array of services, including Exhaust Gas Recirculation (EGR), Selective Catalytic Reduction (SCR), Diesel Oxidation Catalyst (DOC), and Catalytic Converter cleaning. By harnessing state-of-the-art technology, we ensure your machinery operates seamlessly, effectively minimizing those troublesome fault codes.

Quality Cleaning for Optimal Performance

At 30 Min DPF Clean, we understand that a clean machine is a content machine. This is why we go above and beyond to eliminate ash, soot, and other residues from your diesel engines. Our exceptional DPF Cleaning service guarantees the peak performance of your machinery, providing you with peace of mind while keeping those fault codes at bay.

Competitive Prices, Exceptional Service

In the grand scheme of things, 30 Min DPF Clean offers top-tier service without straining your budget. Our competitive pricing model, combined with outstanding DPF cleaning services, makes us the logical choice for those looking to extend the lifespan of their Audi machinery. So, the next time your equipment starts conversing through fault codes, consider getting in touch with 30 Min DPF Clean. Our skilled technicians excel at handling various issues, aiding you in deciphering the Audi Fault Codes List and swiftly getting your machinery back on track. Remember, in machinery maintenance, it’s not just about fixing problems—it’s about preventing them. And 30 Min DPF Clean stands as your dependable partner on that journey.

Conclusion

Understanding Audi fault codes empowers you to take control of your Audi’s health and performance, ensuring it runs smoothly on the road. With the knowledge gained from this guide, you’re better equipped to navigate and troubleshoot issues in your vehicle.

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Frequently Asked Questions (FAQs)

What are Audi fault codes?

Audi fault codes are alphanumeric combinations that represent specific issues detected by the vehicle’s onboard diagnostic system.

Can I continue driving with an Audi fault code?

Whether or not it’s safe to drive with a fault code depends on its severity. Some codes may indicate minor issues, while others may signal significant problems. It’s advisable to address fault codes promptly to prevent further damage.

How often should I check for fault codes on my Audi vehicle?

Regularly checking for fault codes during routine maintenance or when you notice unusual symptoms is a good practice. It helps identify and address issues before they escalate.

Are Audi fault codes the same for all models?

Audi fault codes may vary slightly between different models and generations. Consult your vehicle’s manual or a professional mechanic for model-specific information.

Can fault codes be cleared without fixing the issue?

While it’s possible to clear fault codes, it’s essential to address the underlying problem. Clearing codes without fixing the issue is a temporary solution that may lead to more significant problems in the future.

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For more information on Audi equipment and related services, visit the official Audi website.