Ram Codes |
Trouble Code |
Fault Location |
Probable Cause |
P1000 – P1099 (Fuel and air metering and auxiliary emission control) |
P1004 |
Intake manifold air control valve (short runner) -performance |
Automatic shut-down (ASO) relay circuit open/short, control circuit short circuit to ground, control circuit open, intake manifold air control valve, ECM |
P1100 – P1199 (Fuel and air metering) |
P1105 |
Turbocharger (TC) boost pressure actuator circuit malfunction |
Wiring, TC boost pressure actuator |
P1110 |
Decreased engine performance -high intake air temperature |
Wiring open circuit/short to positive, ground wiredefective, IAT sensor, ECT sensor, cooling system, high engine bay temperature, intake manifold heater relay(s), intake manifold heater(s), ECM 1 |
P1115 |
Engine coolant temperature (ECT) sensor/intake air temperature (IAT) sensor/outside air temperature sensor -signal variation |
Wiring, ECT sensor, IAT sensor, outside air temperature sensor, ECM |
P1128 |
Heated oxygen sensor (H02S) 1, bank 1 signal error |
Mechanical fault, wiring, fuel pressure, injector(s), intake leak, H02S, ECM |
P1129 |
Heated oxygen sensor (H02S) 1, bank 2 signal error |
Mechanical fault, wiring, fuel pressure, injector(s), intake leak, H02S, ECM |
P113C |
Oxygen sensor (02S), control module |
Wiring, connections, 025 control module |
P1180 |
Decreased engine performance -high injection pump fuel temperature |
Wiring open circuit/short to positive, ground wire defective, fuel temperature sensor, fueltemperature sensor, mechanical fault, high engine bay temperature, ECM 1 |
P1192 |
Intake air temperature (IAT) sensor -voltage low |
Wiring, IAT sensor, ECM 1 |
P1193 |
Intake air temperature (IAT) sensor -voltage high |
Wiring, IAT sensor, ECM 1 |
P1194 |
Heated oxygen sensor (H02S), heater control -circuit malfunction |
Wiring, H02S, ECM |
P1195 |
Heated oxygen sensor (H02S) 1, bank 1 slow response |
Wiring, heating inoperative, exhaust leak, H02S |
P1196 |
Heated oxygen sensor (H02S) 1, bank 2 slow response |
Wiring, heating inoperative, exhaust leak, H02S |
P1197 |
Heated oxygen sensor (M02S) 2, bank 1 slow response |
Wiring, heating inoperative, exhaust leak, H02S |
P1200 – P1299 (Fuel and air metering – injector circuit) |
P1239 |
Engine oil temperature (EOT) -temperature too low |
Engine oil, wiring, EOT sensor, ECM |
P125A |
Power enable control circuit -voltage low |
Wiring, ECM |
P125B |
Power enable control circuit -voltage high |
Wiring, ECM |
P1260 |
Engine control module, output driver -open circuit |
Wiring, injector(s), ignition coil(s), ECM,multifunction control module |
P126B |
Engine control module, output driver -short to ground |
Wiring, injector(s), ignition coil(s), ECM, multifunction control module |
P126C |
Engine control module, output driver -short to positive |
Wiring, injector(s), ignition coil(s), ECM, multifunction control module |
P126E |
Engine control module, output driver excessive current draw |
Wiring, injector(s), ignition coil(s), ECM, multifunction control module |
P1272 |
A/C compressor clutch, circuit 2 -voltage low |
Wiring, AlC compressor clutch, ECM |
P1273 |
A/C compressor clutch, circuit 2 -voltage high |
Wiring, A/C compressor clutch, ECM |
P1274 |
A/C compressor clutch, circuit 2 -open circuit |
Wiring, A/C compressor clutch, ECM |
P1275 |
A/C compressor clutch, circuit 2 –circuit malfunction |
Wiring, A/C compressor clutch, ECM |
P1277 |
Starter motor control circuit -voltage low |
Wiring, starter motor, starter motor relay, multifunction control module, ECM |
P1278 |
Starter motor control circuit -voltage high |
Wiring, starter motor, starter motor relay,multifunction control module, ECM |
P1279 |
Starter motor control circuit -open circuit |
Wiring, starter motor, starter motor relay, multifunction control module, ECM |
P127A |
Starter motor control circuit -circuit malfunction |
Wiring, starter motor, starter motor relay, multifunction control module, ECM |
P127C |
Fuel pump, circuit 2 -voltage low |
Wiring, fuel pump, ECM |
P127D |
Fuel pump, circuit 2 -voltage high |
Wiring, fuel pump, ECM |
P127E |
Fuel pump, circuit 2 -open circuit |
Wiring, fuel pump, ECM |
P1280 |
Fuel pump relay -circuit malfunction |
Wiring, fuel pump relay |
P1281 |
Engine temperature -low for long period |
Wiring, cooling system, coolant thermostat, EClsensor |
P1282 |
Fuel pump relay |
Wiring open circuit/short circuit, fuel pump relay |
P1283 |
Engine control module (ECM) 1 -idle signal malfunction |
Wiring, injection pump control module g, ECM 1 |
P1284 |
Injection pump control module -battery voltage out of range |
Wiring, injection pump control module, ECM 1 |
P1285 |
Injection pump control module relay -circuitmalfunction |
Wiring, injection pump control module relay |
P1286 |
Accelerator pedal position (APP) sensor -highinput |
Wiring short to positive, APP sensor, ECM 1 |
P1287 |
Injection pump control module/engine control module (ECM) 1 -supply voltage low |
Wiring, battery, alternator |
P1290 |
Compressed natural gas pressure sensorpressure high |
Compressed natural gas system, wiring,compressed natural gas pressure sensor |
P1291 |
Intake manifold heaters -no temperature rise |
Wiring, intake manifold heater relay(s), intakemanifold heater(s), ECM 1 |
P1292 |
Compressed natural gas pressure sensor voltage high |
Wiring, compressed natural gas pressure sensor |
P1293 |
Compressed natural gas pressure sensor voltage low |
Wiring, compressed natural gas pressure sensor |
P1294 |
Idle speed control (ISC) system rpm lower/ higher than expected |
Wiring, air leak, throttle valve tight/sticking, lAC valve |
P1295 |
Accelerator pedal position (APP) sensor -low input |
Signal wire short circuit to ground, supply wire open circuit, APP sensor, ECM 1 |
P1296 |
Manifold absolute pressure (MAP) sensor no 5 volt supply |
Wiring, MAP sensor, ECM |
P1297 |
Manifold absolute pressure (MAP) sensor |
Wiring, hose connection(s), MAP sensor |
P1298 |
System too lean -at prolonged wide open throttle |
Intake/exhaust leak, MAP sensor, fuel pressure/pump, injector(s), H02S |
P1299 |
Manifold absolute pressure (MAP) sensor/ throttle position (TP) sensor |
Intake leak, hose connection(s), MAP sensor, TP sensor |
P129C |
Powertrain control module (PCM), inverter control -circuit 2 high |
Wiring, inverter module, PCM |
P129E |
Powertrain control module (PCM), inverter control-circuit 2 over-current |
Wiring, inverter module, PCM |
P1300 – P1399 (Ignition system or misfire) |
P1388 |
Engine control relay |
Wiring open circuit/short circuit, engine control relay |
P1389 |
Engine control relay |
Wiring open circuit, engine control relay |
P1391 |
Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -intermittent signal |
Wiring, poor connection, air gap, CKP sensor, CMP sensor |
P1398 |
Engine control module (ECM) -misfire detection limit reached |
Wiring, poor connection, CKP sensor |
P1399 |
Glow plug waming lamp -circuit malfun~tion |
Wiring, glow plug warning lamp, ECM 1 |
P1400 – P1499 (Emission control) |
P1404 |
Exhaust gas recirculation (EGR) valve position sensor malfunction |
Wiring, exhaust gas recirculation (EGR) valve, ECM |
P1411 |
Cylinder cut-out solenoid 1 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure, ECM |
P1414 |
Cylinder cut-out solenoid 4 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure, ECM |
P1416 |
Cylinder cut-out solenoid 6 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure, ECM |
P1417 |
Cylinder cut-out solenoid 7 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure, ECM |
P141A |
Exhaust gas temperature (EGT) sensor 1 & 2 -interchanged |
Wiring, connectors swapped, diesel particulate filter (OPF) |
P144E |
, Exhaust gas recirculation (EGR) -circuit voltage low |
Wiring, EGR valve, ECM |
P144F |
Exhaust gas recirculation (EGR) -circuit voltagehigh |
Wiring, EGR valve, ECM |
P1451 |
Diesel particulate filter (DPF) full |
EGT low, mechanical fault, exhaust leak |
P1475 |
Engine control module (ECM) 1 -auxiliary 5 volt output high |
Wiring, ECM 1 |
P1476 |
Secondary air injection (AIR) system -insufficientflow detected |
AIR pump, AIR valve, AIR hose(s) |
P1477 |
Secondary air injection (AIR) system excessive flow detected |
AIR pump, AIR valve, AIR hose(s), ECM |
P1478 |
AmbienUbattery temperature sensor -range/ performance problem |
Wiring, ambient/battery temperature sensor |
P1478 |
Ambient/battery temperature sensor -range! performance problem |
Wiring, ambient/battery temperature sensor |
P1479 |
Transmission cooling fan relay -circuit malfunction |
Wiring, transmission fluid level low, transmission cooling fan, transmission cooling fan relay |
P1484 |
Diesel particulate filter (DPF) temperature toohigh |
Fuel, injector, EGT sensor, mechanical fault |
P1486 |
Evaporative emission (EVAP) system -blockage detected |
Hose connection(s), hose blocked/trapped, EVAP canister |
P1488 |
Engine control module (ECM) -auxiliary 5 volt output low |
Wiring, ECM |
P1491 |
Engine coolant blower motor relay |
Wiring open circuit/short circuit, engine coolant blower motor relay -low/high speed |
P1492 |
Ambient/battery temperature sensor -voltage high |
Wiring, ambient/battery temperature sensor |
P1493 |
Ambient/battery temperature sensor -voltage low |
Wiring, ambient/battery temperature sensor, ECM |
P1494 |
Evaporative emission (EVAP) leak detection pump pressure switch |
Wiring, hose leak/blockage, EVAP leak detection pump |
P1495 |
Evaporative emission (EVAP) leak detection pump solenoid |
Wiring open circuit/short circuit, hose leak! blockage, EVAP leak detection pump solenoid |
P1496 |
Engine control module (ECM) -5 volt output low |
ECM |
P1500 – P1599 (Vehicle or idle speed control) |
P1501 |
Vehicle over-speed condition -rear axle speed greater than front axle |
Wiring, VSS, mechanical fault, ECM |
P1502 |
Vehicle over-speed condition -front axle speed greater than rear axle |
Wiring, VSS, mechanical fault, ECM |
P1506 |
Crankcase pressure sensor range/performance |
Crankcase pressure sensor |
P1507 |
Crankcase pressure sensor range/performance |
Crankcase breather filter |
P1508 |
Crankcase pressure sensor range/performance |
Crankcase breather filter, mechanical fault |
P150D |
Cold start emission control -irregular idle speed |
Wiring, connections, engine coolant temperature (ECT) sensor, manifold absolute pressure (MAP) sensor, H02S circuit fault, mechanical fault, ECM |
P1521 |
Engine oil sensor module -malfunction |
Wiring, connectors, oil quality, oil level |
P1572 |
Brake pedal position (BPP) switch -circuit malfunction |
BPP switch adjustment, wiring, BPP switch |
P1573 |
Brake pedal position (BPP) switch -circuit malfunction |
BPP switch adjustment, wiring, BPP switch |
P1593 |
Cruise control system, multi-function input AlB -circuit stuck |
Wiring, poor connection, multi-function switch, mechanical fault, ECM |
P1594 |
Alternator -voltage high |
Wiring, battery, alternator |
P1595 |
Cruise control |
Wiring open circuit/short circuit, hoses, cruise control master switch, cruise control vacuum switching valve |
P1596 |
Cruise control master switch -high voltage |
Wiring, cruise control master switch |
P1597 |
Cruise control master switch -low voltage |
Wiring, cruise control master switch |
P1598 |
NC refrigerant pressure sensor -high input |
Wiring, AlC refrigerant pressure too high (cooling fault/incorrectly charged), AlC refrigerant pressure sensor |
P1599 |
AlC refrigerant pressure sensor -low input |
Wiring, AlC refrigerant pressure too low (incorrectly charged), AlC refrigerant pressure sensor |
P1600 – P1699 (ECM – computer output circuit) |
P1602 |
Engine control module (ECM) 1 not programmed |
New ECM not programmed, incorrectly programmed, ECM 1 |
P1603 |
Engine control module (ECM) -RAM link error |
ECM |
P1604 |
Engine control module (ECM) -RAM read/writeerror |
ECM |
P1607 |
Engine control module (ECM) -shut down timer error |
ECM |
P1618 |
Engine control module (ECM) -primary 5 volt output erratic |
Wiring, poor connection, AlC pressure sensor,APP sensor, CKP sensor, throttle control unit,TPS sensor, ECM |
P1628 |
Engine control module (ECM) -auxiliary 5 volt output erratic |
Wiring, poor connection, AlC pressure sensor,APP sensor, CMP sensor, EGR solenoid, EGR valve position sensor, MAP sensor, transmission fluid pressure sensor, ECM |
P1652 |
CAN data bus -short circuit to ground |
Wiring, connected system, ECM |
P1680 |
Clutch pedal position (CPP) switch -circuit malfunction |
Wiring, CPP switch, ECM |
P1682 |
Altemator -voltage low |
Wiring, battery, alternator drive belt, alternator |
P1683 |
Cruise control |
Wiring, cruise control vacuum switching valve |
P1684 |
Engine control module (ECM) 1 -supply voltage disconnected within last 50 ignition switch ON-OFF cycles |
Wiring, battery |
P1685 |
Key not programmed into immobilizer control module |
Wiring, ignition key not matchedldamaged,immobilizer control module |
P1686 |
CAN data bus, immobilizer control module no signal |
Wiring, immobilizer control module |
P1687 |
CAN data bus, instrumentation -no signal |
Wiring, instrumentation control module(mechanical) |
P1688 |
Injection pump/injection pump control module -intemal fault |
Injection pump/injection pump control module |
P1689 |
Injection pump control module communication to engine control module (ECM) 1 malfunction |
Wiring, poor connection, injection pump control module, ECM 1 |
P1690 |
Crankshaft position/injection pump camshaft position sensor -correlation |
Wiring, CKP sensor, injection pump CMP sensor, mechanical fault, ECM 1 |
P1691 |
Injection pump -intemal fault |
Injection pump/injection pump control module D |
P1693 |
Engine control module (ECM) |
Companion module trouble code detected in ECM |
P1694 |
CAN data bus, engine control module (ECM) no signal |
Wiring, ECM |
P1695 |
CAN data bus, SCM -no signal |
Wiring, BCM |
P1696 |
Engine control module (ECM) -EEPROM error |
ECM |
P1697 |
Engine control module (ECM) -EEPROM error |
ECM |
P1698 |
CAN data bus, engine control module (ECM) 2no signal |
Wiring, ECM 2 |
P1698 |
CAN data bus, transmission control module (TCM) no signal |
Wiring, TCM |
P1700 – P1799 (Transmission) |
P1715 |
Restricted port in T3 range |
Other trouble code(s) stored, transmission fluid level, transmission shift linkage adjustment 0 |
P1719 |
Skip shift solenoid -circuit malfunction |
Wiring open circuit/short circuit, skip shift solenoid |
P1736 |
Transmission -gear/input speed/output speed ratio error |
Transmission fluid level, wiring, input shaft speed (ISS) sensor, output shaft speed (055) sensor,transmission mechanical fault |
P1740 |
Torque converter clutch (TCC)/overdrive solenoid-performance problem |
TCC, overdrive solenoid, transmission mechanical fault |
P1756 |
Governor pressure not equal to target (35-40 PSI) |
Wiring, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure sensor, governor pressure solenoid, transmission mechanical fault, TCM |
P1757 |
Governor pressure not equal to target -low pressure malfunction |
Signal wire open circuit/short circuit, valve body,sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM -no 5 volt supply |
P1762 |
Governor pressure sensor -incorrect signal |
Wiring, supply wire open circuit/short circuit, governor pressure solenoid, governor pressure sensor, transmission fluid level, transmission mechanical fault, TCM |
P1763 |
Governor pressure sensor -signal high |
Signal wire short circuit to positive, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM |
P1764 |
Govemor pressure sensor -signal low |
Signal wire short circuit to ground, supply wire open circuit, transmission fluid level, governor pressure sensor, TCM |
P1765 |
Transmission system relay |
Wiring open circuit/short circuit, transmission system relay, ECM |
P1776 |
Solenoid switch valve locked in UR (low/reverse) position |
Wiring open circuit/short circuit, transmission system relay, transmission fluid level low, UR pressure switch, solenoid switch valve |
P1790 |
Fault immediately after shift |
Speed ratio error, transmission mechanical fault |
P1793 |
Torque reduction communication error |
Wiring open circuit/short circuit, ECMITCM |
P1794 |
Transmission speed sensor -ground circuit |
Wiring open circuit, TCM, input shaft speed (ISS)sensor, output shaft speed (055) sensor |
P1797 |
Manual shift overheat |
Wiring, transmission fluid level low, transmission cooling fan -if fitted, transmission fluid temperature (TFT) sensor |
P1800 – P1899 (Transmission) |
P1897 |
Engine control module (ECM) communication malfunction |
ECM |
P1899 |
Park/neutral position (PNP) switch -input circuit malfunction |
Wiring, PNP switch, ECM |
P1D00 – P1D99 (ISO/SAE Reserved) |
P1DF3 |
ECU Not Initialized |
|
P3400 |
Cylinder cut-out system, bank 1 -malfunction |
Wiring, cylinder cut-out solenoid(s), oil pressure,H02S, ECM |
P3401 |
Cylinder cut-out solenoid 1 -circuit malfunction |
Wiring, cylinder cut-out solenoid, ECM |
P3402 |
Cylinder cut-out solenoid 1 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure,ECM |
P3425 |
Cylinder cut-out solenoid 4 -circuit malfunction |
Wiring, cylinder cut-out solenoid, ECM |
P3426 |
Cylinder cut-out solenoid 4 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure,ECM |
P3441 |
Cylinder cut-out solenoid 6 -circuit malfunction |
Wiring, cylinder cut-out solenoid, ECM |
P3442 |
Cylinder cut-out solenoid 6 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure,ECM |
P3449 |
Cylinder cut-out solenoid 7 -circuit malfunction |
Wiring, cylinder cut-out solenoid, ECM |
P3450 |
Cylinder cut-out solenoid 7 -malfunction |
Wiring, cylinder cut-out solenoid, oil pressure,ECM |
P3497 |
Cylinder cut-out system, bank 2 -malfunction |
Wiring, cylinder cut-out solenoid(s), oil pressure,H02S, ECM |
U110A |
Steering column function control module, serialcommunication -circuit malfunction |
Wiring, CAN data bus, ECM |
U110C |
Fuel level, serial communication -circuit malfunction |
Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
U110E |
Outside air temperature, serial communication -circuit malfunction |
CAN data bus, multifunction control module front,ECM |
U110F |
Fuel volume, serial communication -circuitmalfunction |
Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
U1110 |
Vehicle speed, serial communication -circuit malfunction |
CAN data bus, ASS control module, ECM |
U1111 |
Odometer mileage, serial communication -circuitmalfunction |
Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
U1113 |
NC pressure sensor -communication malfunction |
Wiring, multifunction control module, ECM |
U1120 |
Wheel distance traveled, serial communication -circuit malfunction |
CAN data bus, ASS control module, ECM |
U1403 |
Fuel level, serial communication -implausible signal |
Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
U1403 |
Fuel level, serial communication -implausiblesignal |
Wiring, instrument panel, CAN data bus,multifunction control module front, ECM |
U1411 |
Fuel volume, serial communication implausible signal |
Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
U1412 |
Vehicle speed, serial communication -implausible signal |
CAN data bus, ASS control module, ECM |
U1413 |
Odometer mileage, serial communication implausible signal |
Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
U1417 |
LH front wheel, distance traveled -implausible signal |
ABS trouble code(s) stored, CAN data bus, ABS control module, ECM |
U1418 |
RH front wheel, distance traveled implausible signal |
ABS trouble code(s) stored, CAN data bus, ASS control module, ECM |
U1421 |
Fuel volume, serial communication implausible signal |
Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |