Introduction

Unlocking the mysteries of Kubota fault codes is crucial for equipment owners and operators. These fault codes act as a diagnostic tool, providing insights into your machinery’s health and performance. In this comprehensive guide, we’ll delve into the world of Kubota fault code list, deciphering their meanings, and exploring how to troubleshoot and prevent them.

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Kubota Fault Code List

DTC		108	111	112
Name		MAP	IAT	IAT
DTC Name		MAP high pressure	IAT Higher Than Expected Stage 1	IAT Low Voltage
J1939	SPN	106	105	105
	FMI	16	15	4
MIL		ON	OFF	OFF
Detected Item		. Sensor/wiring harness short to power . Sensor malfunction	. Intake air temperature abnormality (High side stage 1)	. Sensor/wiring harness short to ground .Sensor malfunction
DTC Set Preconditions		. Engine Cranking or Running	. Engine Running	. Engine Running
DTC Set Conditions		. Map pressure > 110.3 kPA [abs] (1.125 kgf/cm2, 16.00 psla) . and TPS < 3.0% . and RPM > 1000 min-1 (rpm)	. rum-time wait for all IAT HiExp faults 0.0 sec . IAT > 71 degC (160 degF) . and RPM > 1000 min-1 (RPM)	. IAT voltage < 0.100 V
Period for Judgment or Number of Occurrence for Judgement		. 2 sec	. 60 sec	. 1 sec
System Action		. AL Disable KC . Power derate 1	. AL Disable KC . Power derate 1	. AL Disable KC . Power derate 1
Engine Warning Light		ON	ON	ON
DTC		113	116	117
Name		IAT	ECT/CHT	ECT/CHT
DTC Name		IAT High Voltage	ECT Higher Than Expected Stage 1	ECT/ChHT Low Voltage
J1939	SPN	105	110	110
	FMI	3	15	4
MIL		OFF	OFF	OFF
Detected Item		. Sensor/wiring harness open/short to power . Sensor malfunction	. Engine collant temperature abnormality (High side stage 1)	. Sensor/wiring harness short to ground . Sensor Malfunction
DTC Set Preconditions		. Engine Running	. Engine Running	. Engine Running
DTC Set Conditions		. IAT voltage > 4.90 V	. run time wait for ECT HiExp faults 30.0 Sec . ECT > 110 degC (230 degF) . and RPM > 600 min-1 (rpm)	. ECT voltage < 0.100 V
Period for Judgment or Number of Occurrence for Judgement		. 1 sec	. 20 sec	. 1 sec
System Action		. AL Disable KC . Power derate 1	. AL Disable KC . Power derate 1	. AL Disable KC . Power derate 1
Engine Warning Light		ON	ON	ON
DTC		118	121	122
Name		ECT/CHT	TPS	TPS
DTC Name		ECT/CHT High Voltage	TPS1 % Lower than TPS2 %	TPS1 Signal Voltage Low
J1939	SPN	110	51	51
	FMI	3	1	4
MIL		OFF	ON	ON
Detected Item		. Sensor/wiring harness open/short to power . Sensor malfunction	. TPS malfunction	. TPS circuit in the harness short to ground . TPS malfunction
DTC Set Preconditions		. Engine Running	. Key-On, Engine Cranking, or Running	. Key-On, Engine Cranking, or Running
DTC Set Conditions		. ECT voltage > 4.90 V	. (TPS1 % – TPS2 %) < -20.0 %	. ECT voltage < 0.200 V
Period for Judgment or Number of Occurrence for Judgement		. 1 sec	. 20 sec	. 0.5 sec
System Action		. AL Disable KC . Power derate 1	. Shutdown	. Shutdown
Engine Warning Light		ON	ON	ON
DTC		123	127	129
Name		TPS	IAT	IAT
DTC Name		TPS1 Signal Voltage High	IAT Higher Than Expected Stage 2	BP Low Pressure
J1939	SPN	51	105	108
	FMI	3	0	1
MIL		ON	ON	ON
Detected Item		. TPS circuit in the harness short to power . TPS malfunction	. Intake air temperature abnormality (High side stage 2)	. Sensor out of calibration . Loss for 5V reference feed . (5V_ext1) to MAP . Signal wire open or shorted to ground
DTC Set Preconditions		. Key-On, Engine Cranking, or Running	. Engine Running	. Engine Running
DTC Set Conditions		. TPS1 voltage > 4.80 V	.rum-time wait for all IAT HiExp faults 0.0 sec . IAT > 93 degC (200 degF) . anad RPM > 1000 min-1 (rpm)	. BP < 57.2 kPA [abs] (0.584 kgf/cm2, 8.30 psla)
Period for Judgment or Number of Occurrence for Judgement		. 0.5 sec	. 120 sec	. 1 sec
System Action		. Shutdown	. AL Disable . Force Idle	. AL Disable KC
Engine Warning Light		ON	ON	ON
DTC		134	154	171
Name		EGO Sensors	EGO Sensors	Adaptive Learn
DTC Name		EGO1 Open/Lazy (HO2S1)	EGO2 Open/Lazy (HO2S2)	Adaptive Learn Bank 1 High (Gasoline)
J1939	SPN	3217	3227	4237
	FMI	5	5	5
MIL		ON	ON	ON
Detected Item		. Open Feed Circuit to O2 Heater . Open heater ground circuit . Open or shorted to ground O2 signal wire . Open sensor ground (5Vrtn1) . Inoperative Sensor	. Open Feed Circuit to O2 Heater . Open heater ground circuit . Open or shorted to ground O2 signal wire . Open sensor ground (5Vrtn1) . Inoperative Sensor	. exhaust leaks upstream or near the HEGO sensor . reduced fuel supply pressure to the fuel injection system . a inoperative sensor . an injector that is stuck closed or dirty . weak spark or lack of spark to a cylinder . a MAP sensor that indicates pressure that is lower than ture pressure
DTC Set Preconditions		. Engine Running	. Engine Running	. Engine Running, Adaptive Mode
DTC Set Conditions		. EGO cold persistently > 120.0 sec	. EGO cold persistently > 120.0 sec	. AL_BM >30 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psla)
Period for Judgment or Number of Occurrence for Judgement		. 5 sec	. 5 sec	. 3 updates
System Action		. CL Disable . AL Disable KC	. CL Disable . AL Disable KC	. CL Disable . AL Disable KC
Engine Warning Light		ON	ON	ON
DTC		172	182	183
Name		Adaptive Learn	FT	FT
DTC Name		Adaptive Learn Bank1 Low (Gasoline)	FT gasoline low	FT gasoline high
J1939	SPN	4237	174	174
	FMI	1	4	3
MIL		ON	ON	ON
Detected Item		. an inoperative O2 sensor . high fuel supply pressure or temperature . internal mechanical engine damage an injector that is stuck open or leaking	. Operating in a frigid atmosphere . Sensor out of calibration	. Operating in a frigid atmosphere . Sensor out of calibration
DTC Set Preconditions		. Engine Running, Adaptive Mode	. Engine Running	. Engine Running
DTC Set Conditions		. AL_BM < 30 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) and MAP <= 682 kPa [abs] (6.96 kgf/cm2 , 99.0 psia	. FT fault mode Temp only . fuel temp < 37.0 degC ( 35.0 degF)	. FT fault mode Temp only . fuel temp > 60.0 degC (140.0 degF)
Period for Judgment or Number of Occurrence for Judgement		. 3 Updates	. 1 sec	. 1 sec
System Action		. CL Disable . AL Disable KC	. None	. Power dereate 2
Engine Warning Light		ON	ON	ON
DTC		187	217	219
Name		FT	ECT/CHT	Engine Speed
DTC Name		FT Gaseous Fuel Extremery Low	ECT Higher Than Expected 2	RPM Higher Than Max Allowed Governed Speed
J1939	SPN	3468	110	515
	FMI	1	0	15
MIL		ON	OFF	OFF
Detected Item		. Not vaporized completely	. Engine coolant temperature abnormality (high side stage 2)	. Engine over speed condition, stuck throttle, large vacuum leak into intake manifold after throttle blade
DTC Set Preconditions		. Engine Running	. Engine Running	. Engine Running
DTC Set Conditions		. Fuel temp < 40 °C ( 40 °F)	. run time wait for ECT HiExp faults 30.0 sec . ECT > 116 degC (240 degF) . and RPM > 600 min-1 (rpm)	. RPM > 3800 min-1 (rpm)
Period for Judgment or Number of Occurrence for Judgement		. 1 sec	. 30 sec	. 1 sec
System Action		. None	. Power derate 2	. reduce throttle to limit speed
Engine Warning Light		ON	ON	ON
DTC		221	222	223
Name		TPS	TPS	TPS
DTC Name		TPS1 % Higher than TPS2 %	TPS2 Signal Voltage Low	TPS2 Siginal Voltage High
J1939	SPN	51	3673	3673
	FMI	0	4	3
MIL		ON	ON	ON
Detected Item		. TPS malfunction	. TPS circuit in the harness short to ground TPS malfunction	. TPS circuit in the harness short to power . TPS malfunction
DTC Set Preconditions		. Key-On, Engine Cranking, or Running	. Key-On, Engine Cranking, or Running	. Key-On, Engine Cranking, or Running
DTC Set Conditions		. (TPS1 % TPS2 %) > 20.0 %	. TPS2 voltage < 0.200 V	. TPS2 voltage > 4.80 V
Period for Judgment or Number of Occurrence for Judgement		. 1 sec	. 0.5 sec	. 0.5 sec
System Action		. Shutdown	. Shutdown	. Shutdown
Engine Warning Light		ON	ON	ON
DTC		261	262	264
Name		Injectors	Injectors	Injectors
DTC Name		Injector Drive #1 Open/Short-To-Ground	Injector Driver #1 Short-To-Power	Injector Driver #2 Open/Short-To-Ground
J1939	SPN	651	651	652
	FMI	5	6	5
MIL		ON	ON	ON
Detected Item		. Loss of 12.0 V feed to injector . open injector coil . open or shorted to ground injector driver circuit in engine harness	. Injector coil shorted internally . Injector driver circuit shorted to voltage between injector and ECM	. Loss of 12.0 V feed to injector . open injector coil . open or shorted to ground injector driver circuit in engine harness
DTC Set Preconditions		. Key-On, Engine Running	. Key-On, Engine Running	. Key-On, Engine Running
DTC Set Conditions		. Injector1 off-state low-side < 4.00 V . and battery voltage > 9.00 V	. Injector1 on-state low-side > 4.00 V . and battery voltage < 16.0 V	. Injector2 off-state low-side < 4.00 V . and battery voltage > 9.00 V
Period for Judgment or Number of Occurrence for Judgement		. 10 Samples	. 10 Samples	. 10 Samples
System Action		. CL Disable . AL Disable KC . Low Rev Limit	. CL Disable . AL Disable KC . Low Rev Limit	. CL Disable . AL Disable KC . Low Rev Limit
Engine Warning Light		ON	ON	ON
DTC		265	267	268
Name		Injectors	Injectors	Injectors
DTC Name		Injector Drivers #2 Short-To-Power	Injector Drivers #3 Open/Short-To-Ground	Injector Driver #34 Short-ToPower
J1939	SPN	652	653	653
	FMI	6	5	6
MIL		ON	ON	ON
Detected Item		. Injector coil shorted internally . Injector driver circuit shorted to voltage between injector and ECM	. Loss of 12.0 V feed to injector . open injector coil . open or shorted to ground injector driver circuit in engine harness	. Injector coil shorted internally . Injector driver circuit shorted to voltage between injector and ECM
DTC Set Preconditions		. Key-On, Engine Running	. Key-On, Engine Running	. Key-On, Engine Running
DTC Set Conditions		. Injector2 on-state low-side > 4.00 V . and battery voltage < 16.0 V	. Injector3 off-state low-side < 4.00 V . and battery voltage > 9.00 V	. Injector3 on-state low-side > 4.00 V . and battery voltage < 16.0 V
Period for Judgment or Number of Occurrence for Judgement		. 10 Samples	. 10 Samples	. 10 Samples
System Action		. CL Disable . AL Disable KC Low Rev Limit	. CL Disable . AL Disable KC Low Rev Limit	. CL Disable . AL Disable KC Low Rev Limit
Engine Warning Light		ON	ON	ON
DTC		270	271	326
Name		Injectors	Injectors	Knock
DTC Name		Injector Driver #4 Open/Short-To-Ground	Injector Driver #4 Short-To-Power	Knock 1 Excessive or Erratic Signal
J1939	SPN	654	654	731
	FMI	5	6	2
MIL		ON	ON	ON
Detected Item		. Loss of 12.0 V feed to injector . open injector coil . open or shorted to ground injector driver circuit in engine harness	. Injector coil shorted internally . Injector driver circuit shorted to voltage between injector and ECM	. Knock signal abnormality (High side) . Sensor malfunction
DTC Set Preconditions		. Key-On, Engine Running	. Key-On, Engine Running	. Key-On, Engine Running
DTC Set Conditions		. Injector4 off-state low-side < 4.00 V . and battery voltage > 9.00 V	. Injector4 on-state low-side > 4.00 V . and battery voltage < 16.0 V	. KNK1 sensor input > 0.500 V . MAP < 55.2 kPa [abs] (0.562 kgf/cm2, 8.00 psia)
Period for Judgment or Number of Occurrence for Judgement		. 10 Samples	. 10 Samples	. 10 Samples
System Action		. CL Disable . AL Disable KC Low Rev Limit	. CL Disable . AL Disable KC Low Rev Limit	. Power derate 1 . Retard Fault KNK
Engine Warning Light		ON	ON	ON
DTC		327	336	337
Name		Knock	Cam/Crank Sensors	Cam/Crank Sensors
DTC Name		Knock 1 Sensor Open or Not Present	Crank Input Signal Noise	Loss of Crankshaft Input Signal
J1939	SPN	731	636	636
	FMI	4	2	4
MIL		ON	ON	ON
Detected Item		. Sensor/wiring harness open/short to power . Sensor malfunction	. Crank+ or Crank circuits in wrong connector terminal slot	. Loss of sensor feed . open sensor ground . open or shorted to ground signal wire
DTC Set Preconditions		. Key-On, Engine Running	. Key-On, Engine Running	. Key-On, Engine Running
DTC Set Conditions		. KNK1 sensor input < 0.005 V . and RPM > 2000 min-1 (rpm) . and MAP > 82.7 kPa [abs] (0.844 kgf/cm2, 12.00 psia)	. Number of invalid cam re-syncs 3 re-syncs . within a time window of <= 800 ms	. Cam pulsed without crank activity > 3 cam pulses
Period for Judgment or Number of Occurrence for Judgement		. 10 sec	. 1 sec	. 1 sec
System Action		. Power derate 1 . Retard Fault KNK	. AL Disable KC	. None
Engine Warning Light		ON	ON	ON
DTC		420	524	562
Name		Catalyst	Oil Pressure	Battery Voltage
DTC Name		Catalyst Monitor	Oil Pressure Low	Battery Voltage (VBAT) Low
J1939	SPN	3050	100	168
	FMI	11	1	17
MIL		OFF	ON	ON
Detected Item			. Low Oil Pressure	. Wiring Harness Open/short/damage . Battery abnormality
DTC Set Preconditions		.Engine Running	. Key On, Engine On	. Key On, Engine On
DTC Set Conditions		. EGO3/4 RMS > 0.008 phi . and EGO3/4 RMS > EGO1/2 RMS 50 % . and EGO3/4 RMS > CL waveform RMS 50 % . and mass flow at ports >= 10.0 g/sec and <= CBT CBT_ss +/ 50.0 degF	. run time wait for oil pressure low faults 4.0 sec . RPM lower limit for oil pressure low faults 300 min-1 (rpm) . Oil pressure pulled-up input less than a threshold voltage of 2.50 V	. Voltage < 9.00 V . and RPM > 1000 min-1 (rpm)
Period for Judgment or Number of Occurrence for Judgement		. 100 updates	. 1 sec	. 5 sec
System Action		. Shutdown . CL Disable . AL Disable . Hard Warning	. Shutdown	. AL Disable KC . Power derate 2
Engine Warning Light		ON	ON	ON
DTC		563	601	604
Name		Battery Voltage	Internal Processor Diagnostics	Internal Processor Diagnostics
DTC Name		Battery Voltage (VBAT) High	Microprocessor Failure-FLASH	Microprocessor Failure-RAM
J1939	SPN	168	628	630
	FMI	15	13	12
MIL		ON	ON	ON
Detected Item		. System voltage abnormality (High side)	. Faulty ECU	. Faulty ECU
DTC Set Preconditions		. Key-On, Engine Cranking, or Running	. Key On	. Key On
DTC Set Conditions		. Voltage > 16.00 V	. Internal microprocessor error	. Internal ECM microprocessor memory access failure
Period for Judgment or Number of Occurrence for Judgement		. 3 sec	. N/A	. N/A
System Action		. AL Disable KC . Low Rev Limit	. Never Forget . AL Disable KC . Power derate 2	. Never Forget . AL Disable KC . Power derate 2
Engine Warning Light		ON	OFF	OFF
DTC		606	627	628
Name		Internal Processor Diagnostics	Fuel Pump Relay Control/Coil	Fuel Pump Relay Control/Coil	Fuel Pump Motor Feedback
DTC Name		Microprocessor Failure-COP	Fuel Pump Relay Coil Open	Fuel Pump Relay Ground Shot
J1939	SPN	629	1348	1348	1347
	FMI	31	5	4	5
MIL		ON	ON	ON	ON
Detected Item		. faulty ECU	. OPen coil in relay . Open in relay driver circuit in engine harness	. Relay pull in coil shorted internally . relay driver circuit shorted to ground in wire harness
DTC Set Preconditions		. Key On	. Key On. Engine Off	. Engine Running
DTC Set Conditions		. Internal microprocessor error	. Fuel Pump relay coil output open circuit	. Fuel Pump relay coil output shorted to ground	. Fuel pump motor high-side on-state < 4.0 volts . battery voltage > 8.0 volts
Period for Judgment or Number of Occurrence for Judgement		. N/A	. 10 samples	. 10 samples	. 2 sec
System Action		. Never Forget . AL Disable KC . Power derate 2	. None	. None	. None
Engine Warning Light		OFF	ON	ON	ON
DTC		629		642	643
Name		Fuel Pump Relay Contorl/Coil	Fuel Pump Motor Feedback
DTC Name		Fuel Pump Relay Coil Short-To Power		Sensor Supply Voltage 1 Low (5Vext1)	Sensor Supply Voltage 1 Low (5Vext1)
J1939	SPN	1348	1347	1079	1079
	FMI	3	6	4	3
MIL		ON	ON	ON	ON
Detected Item		. Shorted relay pull in coil . relay driver circuit shorted to voltage in wire harness		. Wiring harness short to ground . ECM malfunction	. Wiring harness short to 12.0 V power . ECM malfunction
DTC Set Preconditions		. Engine Running		. Key-On, Engine OFF, or Running	. Key-On, Engine OFF, or Running
DTC Set Conditions		. Fuel Pump relay coil output short to power/ voltage	. Fuel pump motor high-side off-state < 4.0 volts . battery voltage < 16.0 volts	. 5VE1 < 4.60 V	. 5VE1 > 5.40 V
Period for Judgment or Number of Occurrence for Judgement		. 10 samples	. 2 sec	. 1 sec	. 1 sec
System Action		. None	. None	. AL Disable . Power derate 1	. AL Disable . Power derate 1
Engine Warning Light		ON	ON	ON	ON
DTC		652	653	686
Name		5 V External	5 V External	Power Relay Control/Coll
DTC Name		Suensor Supply Voltage 2 Low (5Vext2)	Suensor Supply Voltage 2 High (5Vext2)	Power relay Ground Short
J1939	SPN	1080	1080	1485
	FMI	4	3	4
MIL		ON	ON	ON
Detected Item		. Wiring harness short to groun . ECM malfunction	. Wiring harness short to 12.0 V power . ECM Malfunction	. Short to ground in relay pull in coil . short to ground in relay driver circuit in wire harness
DTC Set Preconditions		. Key-On, Engine OFF, or Running	. Key-On, Engine OFF, or Running	. Key On, Engine Off
DTC Set Conditions		. 5VE2 < 4.60 V	. 5VE2 > 5.40 V	. Power relay coil output shorted to ground
Period for Judgment or Number of Occurrence for Judgement		. 1 sec	. 1 sec	. 10 samples
System Action		. AL Disable . Power derate 1	. AL Disable . Power derate 1	. None
Engine Warning Light		ON	ON	OFF
DTC		687	1111	1112
Name		Power Relay Control/Coil	Engine Speed	Engine Speed
DTC Name		Power Relay Coil Short-To-Power	RPM Above Fuel Rev Limit Level	RPM Above Spark Rev Limit Level
J1939	SPN	1485	515	515
	FMI	3	16	0
MIL		ON	ON	ON
Detected Item		. Shorted relay pull in coil . relay driver circuit shorted to voltage in wire harness	. Engine overspped condition, faulty Crank sensor or input	. Enigne overspeed condition, faulty Crank Sensor or input
DTC Set Preconditions		. Key On, Engine Off	. Engine Running	. Engine Running
DTC Set Conditions		. Power relay coil output short to power/voltage	. RPM > 4200 min-1 (rpm)	. RPM > 4300 min-1 (rpm)
Period for Judgment or Number of Occurrence for Judgement		. 10 Samples	. 1 sec	. 1 sec
System Action		. None	. disable fuel injectors or gaseous fuel control actuator	. disable ignition coils
Engine Warning Light		OFF	ON	ON
DTC		1121	1151	1152
Name		FPP	Closed Loop	Closed Loop
DTC Name		FPP1/2 Simultaneous Voltages Out-of-Range	Closed Loop high (LPG)	Closed Loop Low (LPG)
J1939	SPN	91	4236	4236
	FMI	31	0	1
MIL		ON	ON	ON
Detected Item		. Wiring harness open/short/damage . FPP malfunction	. exhaust leaks upstream or near the HEGO sensor . reduced fuel supply pressure to the gaseous fuel control system . a fuel supply or manifold leak . a non-responsive HEGO sensor	. high fuel supply pressure to the gaseous fuel control or faulty pressure regulator . a non-responsive HEGO sensor
DTC Set Preconditions		. Key on, Enigne Off	. Engine Running, Closed Loop Mode	. Engine Running, Closed Loop Mode
DTC Set Conditions		. User same parameter as individual FPP 1/2 voltage fault detection above	. CL_BM > 35 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)	. CL_BM < 35 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)
Period for Judgment or Number of Occurrence for Judgement		. 0.5 sec	. Power Derate2 . 5 updates	. 5 updates
System Action		. Power Derate 2 . Low Rev Limit . Force Idle	. CL Disable . AL Disable KC	. CL Disable . AL Disable KC
Engine Warning Light		OFF	ON	ON
DTC		1153	1154	1155
Name		Closed Loop	Closed Loop	Closed Loop
DTC Name		Closed Loop High (NG)	Closed Loop Low (NG)	Closed Loop Bank 1 High (Gasoline)
J1939	SPN	4236	4236	4236
	FMI	0	1	0
MIL		ON	On	ON
Detected Item		. exhaust leaks upstream or near the HEGO sensor . reduced fuel supply pressure to the gaseous fuel control system . a fuel supply or manifold leak . a non-responsive HEGO sensor	. high fuel supply pressure to the gaseous fuel control or faulty pressure regulator . a non-responsive HEGO sensor	. exhaust leaks upstream or near the HEGO sensor . reduced fuel supply pressure . an injector that is stuck closed
DTC Set Preconditions		. Engine Running, Closed Loop Mode	. Engine Running, Closed Loop Mode	. Engine Running, Closed Loop Mode
DTC Set Conditions		. CL_BM > 35 % . and RPM <= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)	. CL_BM < 35 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)	. CL_BM > 35 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)
Period for Judgment or Number of Occurrence for Judgement		. 5 updates	. 5 updates	. 5 updates
System Action		. CL Disable . AL Disable KC	. CL Disable . AL Disable KC	. CL Disable . AL Disable KC
Engine Warning Light		ON	ON	ON
DTC		1156	1161	1162
Name		Closed Loop	Adaptive Learn	Adaptive Learn
DTC Name		Closed Loop Bank 1 Low (Gasoline)	Adaptive Learn High (LPG)	Adaptive Learn Low (LPG)
J1939	SPN	4236	4237	4237
	FMI	1	0	1
MIL		ON	ON	ON
Detected Item		. high fuel supply pressure to the fuel injection system . a non-responsive HEGO sensor . an injector that is stuck open	. exhaust leaks upstream or near the HEGO sensor . reduced fuel supply pressure to the gaseous fuel control system . a fuel supply or manifold leak . a non-responsive HEGO sensor	. high fuel supply pressure to the gaseous fuel control or faulty pressure regulator . a non-responsive HEGO sensor
DTC Set Preconditions		. Engine Running, Closed Loop Mode	. Engine Running, Adaptive Mode	. Engine Running, Adaptive Mode
DTC Set Conditions		. CL_BM < 35 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)	. AL_BM > 30 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)	. AL_BM < 30 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)
Period for Judgment or Number of Occurrence for Judgement		.5 updates	. 3 updates	. 3 updates
System Action		. CL Disable . AL Disable KC	. CL Disable . AL Disable KC	. CL Disable . AL Disable KC
Engine Warning Light		ON	ON	ON
DTC		1163	1164	1165
Name		Adaptive Learn	Adaptive Learn	Catalyst
DTC Name		Adaptive Learn High (NG)	Adaptive Learn Low (NG)	Catalyst inactive on LPG
J1939	SPN	4237	4237	3050
	FMI	0	1	11
MIL		ON	ON	OFF
Detected Item		. exhaust leaks upstream or near the HEGO sensor . reduced fuel supply pressure to the gaseous fuel control system . a fuel supply or manifold leak . a non-responsive HEGO sensor	. high fuel supply pressure to the gaseous fuel control or faulty pressure regulator . a non-responsive HEGO sensor
DTC Set Preconditions		. Engine Running, Adaptive Mode	. Engine Running, Adaptive Mode	. Engine Running
DTC Set Conditions		. AL_BM > 30 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)	. AL_BM < 30 % . and RPM >= 0 min-1 (rpm) . and RPM <= 9999 min-1 (rpm) . and MAP >= 0.0 kPa [abs] (0.0 kgf/cm2, 0.0 psia) . and MAP <= 682 kPa [abs] (6.96 kgf/cm2, 99.0 psia)	. EGO3/4 RMS > 0.008 phi . and EGO3/4 RMS > EGO1/2 RMS 50 % . and EGO3/4 RMS > CL waveform RMS 50 % . and mass flow at ports >= 10.0 g/sec and <= CBT CBT_ss +/ 50.0 degF
Period for Judgment or Number of Occurrence for Judgement		.3 updates	. 3 updates	. 100 updates
System Action		. CL Disable . AL Disable KC	. CL Disable . AL Disable KC	. Shutdown . CL Disable . AL Disable . Hard Warning
Engine Warning Light		ON	ON	ON
DTC		1166	1171	1172
Name		Catalyst	EPR Diagnostics	EPR Diagnostics
DTC Name		Catalyst Inactive on NG	EPR/CFV Regulation Pressure Higher than Exptected	EPR/CFV Regulation Pressure Lower than Expected
J1939	SPN	3050	520260	520260
	FMI	11	0	1
MIL		OFF	on	ON
Detected Item			. Inlet pressure to DEPR i stoo high	. Inlet pressure to DEPR is too low. . Malfunctioning lock off valve, plugged fuel filter, closed manual valve or fuel tank out of fuel
DTC Set Preconditions		. Engine Running	. Engine Running	. Engine Running
DTC Set Conditions		. EGO3/4 RMS > 0.008 phi . and EGO3/4 RMS > EGO1/2 RMS 50 % . and EGO3/4 RMS > CL waveform RMS 50 % . and mass flow at ports >= 10.0 g/sec and <= CBT CBT_ss +/ 50.0 degF	. EPR actual-commanded pressure > 2.50 in H2O	. EPR actual-commanded pressure < -2.50 in H2O
Period for Judgment or Number of Occurrence for Judgement		. 100 updates	. 5 sec	. 5 sec
System Action		. CL Disable . AL Disable KC	. AL Disable	. AL Disable
Engine Warning Light		ON	ON	ON
DTC		1173	1174	1175
Name		EPR Diagnostics	EPR Diagnostics	EPR Diagnostics
DTC Name		EPR/CFV comm lost	EPR/CFV Voltage Supply High	EPR/CFV Voltage Supply Low
J1939	SPN	520620	520620	520620
	FMI	31	3	4
MIL		OFF	ON	ON
Detected Item		. Faulty CAN cinnection . CAN terminal incorrect	. Supply voltage to the EPR/CFV is too high	. Supply voltage to the EPR/CFV is too low
DTC Set Preconditions		. Engine Running	. Engine Running	. Engine Running
DTC Set Conditions		. NO EPR packets received within 500ms	. Voltage uspply to EPR/CFV is > 33.0 VDC	. Voltage supply to EPR/CFV is < 18.0 VDC
Period for Judgment or Number of Occurrence for Judgement		. 0.5 sec	. 5 sec	. 5 sec
System Action		. CL Disable . AL Disable KC	. AL Disable . AL Disable KC . Power Derate 2 . Low Rev Limit	. AL Disable . AL Disable KC . Power Derate 2 . Low Rev Limit
Engine Warning Light		ON	ON	ON
DTC		1176	1177	1611
Name		EPR Diagnostics	EPR Diagnostics	5V External
DTC Name		EPR/CFV Internal Actuator Fault Detection	EPR/CFV Internal Actuator Fault Detection	Sensor SUpply Voltage (5Vert 1/2) Simultaneous Out-of-Range
J1939	SPN	520260	520260	1079
	FMI	12	12	31
MIL		ON	ON	ON
Detected Item		. Short or open circuit in actuator coil . Associated wiring . Overheating of actuator drive electronics	. DEPR internal microprocessor or memory failure, fuel temperature sensor failure.	. Wiring harness short to 12V power or ground . ECM malfunction
DTC Set Preconditions		. Engine Running	. Engine Running	. Engine On
DTC Set Conditions		. the DEPR electronics detect a fault condition associated with its internal actuator.	. the DEPR electronics detect a fault condition associated with its internal circuitry.	. 5Vext1> 5.40 V or 5Vext1< 4.60 V, and 5Vext2 > 5.40 V or 5Vext2 < 4.60 V
Period for Judgment or Number of Occurrence for Judgement		. 0.25 sec	. 0.25 sec	. 1 sec
System Action		. AL Disable	. AL Disable	. Power Derate 2 . Low Rev Limit . Force Idle
Engine Warning Light		ON	ON	ON
DTC		1612	1613	1614
Name		Internal Processor Diagnostics	Internal Processor Diagnostics	Internal Processor Diagnostics
DTC Name		Microprocessor Failure-RTI 1	Microprocessor Failure-RTI 2	Microprocessor Failure-RTI 3
J1939	SPN	629	629	629
	FMI	31	31	31
MIL		ON	ON	ON
Detected Item		. Faulty ECU	. Faulty ECU	. Faulty ECU
DTC Set Preconditions		. Key On	. Key On	. Key On
DTC Set Conditions		. Internal microprocessor error	. Internal microprocessor error	. Internal microprocessor error
Period for Judgment or Number of Occurrence for Judgement		. N/A	. N/A	. N/A
System Action		. Shutdown . CL Disable . AL Disable . Hard Warning	. Never Forget . AL Disable KC . Power derate 2	. Never Forget . AL Disable KC . Power derate 2
Engine Warning Light		OFF	OFF	OFF
DTC		1615	1616	1673
Name		Internal Processor Diagnostics	Internal Processor Diagnostics	Internal Processor Diagnostics
DTC Name		Microprocessor Failure-A/D	Microprocessor Failure-Interrupt	Calibration Configuration Error
J1939	SPN	629	629	629
	FMI	31	31	31
MIL		ON	ON	ON
Detected Item		. Faulty ECU	. Faulty ECU	. ECM Malfunction
DTC Set Preconditions		. Key On	. Key On	. Key On
DTC Set Conditions		. Internal microprocessor error	. Internal microprocessor error	. Specific calibration variable checks do not return expected results
Period for Judgment or Number of Occurrence for Judgement		. N/A	. N/A	. N/A
System Action		. Shutdown . CL Disable . AL Disable . Hard Warning	. Never Forget . AL Disable KC . Power derate 2	. Never Forget . AL Disable KC . Power derate 2
Engine Warning Light		OFF	OFF	OFF
DTC		2111	2112	2121
Name		TPS	TPS	FPP
DTC Name		Unable to Reach Lower TPS	Unable to Reach Lower TPS	FPP1 Lower Than FPP2
J1939	SPN	51	51	91
	FMI	7	7	18
MIL		ON	ON	ON
Detected Item		. TPS Malfunction	. TPS Malfunction	. Wiring Harness Open/Short/Damage . FPP Malfunction
DTC Set Preconditions		. Cranking or Running	. Cranking or Running	. Key On, Engine Off
DTC Set Conditions		. target TPS-actual TPS < 20.0 % . persistently longer than 200 ms while battery voltage > 9.00 V and battery voltage < 16.0 V	. target TPS-actual TPS > 20.0 % . persistently longer than 200 ms while battery voltage > 9.00 V and battery voltage < 16.0 V	. (FPP 1 % – FPP 2 %) < 20.0 %
Period for Judgment or Number of Occurrence for Judgement		. 1 sec	. 1 sec	. 1.5 sec
System Action		. Shutdown	. Shutdown	. Power derate 2 . Low Rev Limit
Engine Warning Light		ON	ON	ON
DTC		2122	2123	2126
Name		FPP	FPP	FPP
DTC Name		FPP1 Voltage High	FPP1 Voltage Low	FPP1 Higher than FPP2
J1939	SPN	91	91	91
	FMI	3	4	16
MIL		ON 2Hz	ON 2Hz	ON
Detected Item		. Wiring harness open/short/damage . FPP malfunction	. Wiring harness open/short/damage . FPP malfunction	. Wiring harness open/short/damage . FPP malfunction
DTC Set Preconditions		. Key On	. Key on, Engine Off	. Key on, Engine Off
DTC Set Conditions		. FPP1 voltage > 4.80 V	. FPP1 voltage < 0.200 V	. (FPP 1 % – FPP 2 %) > 20.0 %
Period for Judgment or Number of Occurrence for Judgement		. 0.5 sec	. 0.5 sec	. 1.5 sec
System Action		. Power derate 1 . Low Rev Limit	. Power derate 1 . Low Rev Limit	. Power derate 2 . Low Rev Limit
Engine Warning Light		ON	ON	ON
DTC		2127	2128	2135
Name		FPP	FPP	TPS
DTC Name		FPP2 voltage low	FPP2 voltage high	TPS1/2 Simultaneous Voltages out of range
J1939	SPN	29	29	51
	FMI	4	3	31
MIL		ON 2Hz	ON 2Hz	ON
Detected Item		. Wiring harness open/short/damage . FPP malfunction	. Wiring harness open/short/damage . FPP malfunction	. TPS Malfunction
DTC Set Preconditions		. Key On	. Key On	. Key On, Engine On
DTC Set Conditions		. FPP1 voltage < 0.200 V	. FPP1 voltage > 4.80 V	. User same parameter as individual TPS1/2 voltage fault detection above
Period for Judgment or Number of Occurrence for Judgement		. 0.5 sec	. 0.5 sec	. 0.5 sec
System Action		. Power derate 1 . Low Rev Limit	. Power derate 1 . Low Rev Limit	. Shutdown
Engine Warning Light		ON	ON	ON
DTC		2300	2301	2303
Name		Spark Coil Primary	Spark Coil Primary	Spark Coil Primary
DTC Name		Spark Coil #1 Primary Open/Short-to-Ground	Spark Coil #1 Primary Short-to-Power	Spark Coil #2 Primary Open/Short-to-Ground
J1939	SPN	1268	1268	1269
	FMI	5	6	5
MIL		ON	ON	ON
Detected Item		. a short to ground or open circuit in the harness . an open internal to the primary coil	. a short to power in the harness . a short internal to the primary coil	. a short to ground or open circuit in the harness . an open internal to the primary coil
DTC Set Preconditions		. Key On, Engine On	. Key On, Engine On	. Key On, Engine On
DTC Set Conditions		. Adaptive dwell adjustment >= 2.0 ms . or total dwell >= 14.0 ms . and battery voltage > 11.0 V	. Adaptive dwell adjustment <= 2.0 ms . or total dwell <= 4.0 ms . and battery voltage < 16.0 V	. Adaptive dwell adjustment >= 2.0 ms . or total dwell >= 14.0 ms . and battery voltage > 11.0 V
Period for Judgment or Number of Occurrence for Judgement		. 10 Sparks	. 10 Sparks	. 10 Sparks
System Action		. CL Disable . AL Disable . Low Rev Limit	. CL Disable . AL Disable . Low Rev Limit	. CL Disable . AL Disable . Low Rev Limit
Engine Warning Light		ON	ON	ON
DTC		2304	2306	2307
Name		Spark Coil Primary	Spark Coil Primary	Spark Coil Primary
DTC Name		Spark Coil #2Primary Short-To-Power	Spark Coil #3 Primary Open/Short-to-Ground	Spark Coil #3 Primary Short-to-Power
J1939	SPN	1269	1270	1270
	FMI	6	5	6
MIL		ON	ON	ON
Detected Item		. a short to power in the harness . a short internal to the primary coil	. a short to ground or open circuit in the harness . an open internal to the primary coil	. a short to power in the harness . a short internal to the primary coil
DTC Set Preconditions		. Key On, Engine On	. Key On, Engine On	. Key On, Engine On
DTC Set Conditions		. Adaptive dwell adjustment <= 2.0 ms . or total dwell <= 4.0 ms . and battery voltage < 16.0 V	. Adaptive dwell adjustment >= 2.0 ms . or total dwell >= 14.0 ms . and battery voltage > 11.0 V	. Adaptive dwell adjustment <= 2.0 ms . or total dwell <= 4.0 ms . and battery voltage < 16.0 V
Period for Judgment or Number of Occurrence for Judgement		. 10 Sparks	. 10 Sparks	. 10 Sparks
System Action		. CL Disable . AL Disable . Low Rev Limit	. CL Disable . AL Disable . Low Rev Limit	. CL Disable . AL Disable . Low Rev Limit
Engine Warning Light		ON	ON	ON
DTC		2309	2310
Name		Spark Coil Primary	Spark Coil Primary
DTC Name		Spark Coil #4 Primary Open/Short-to-Ground	Spark Coil #4 Primary Short-to-Power
J1939	SPN	1271	1271
	FMI	5	6
MIL		ON	ON
Detected Item		. a short to ground or open circuit in the harness . an open internal to the primary coi	. a short to power in the harness . a short internal to the primary coil
DTC Set Preconditions		. Key On, Engine On	. Key On, Engine On
DTC Set Conditions		. Adaptive dwell adjustment >= 2.0 ms . or total dwell >= 14.0 ms . and battery voltage > 11.0 V	. Adaptive dwell adjustment <= 2.0 ms . or total dwell <= 4.0 ms . and battery voltage < 16.0 V
Period for Judgment or Number of Occurrence for Judgement		. 10 Sparks	. 10 Sparks
System Action		. CL Disable . AL Disable . Low Rev Limit	. CL Disable . AL Disable . Low Rev Limit
Engine Warning Light		ON	ON

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Understanding Kubota Fault Codes

Kubota equipment is known for its reliability and efficiency, but like any machinery, it can encounter issues. Kubota fault codes are alphanumeric combinations that indicate specific problems within the equipment and its components. Understanding these codes is essential for timely diagnosis and resolution.

Common Kubota Fault Codes and Their Meanings

Fault Code 101 – Engine Oil Pressure Low

Fault code 101 typically indicates a problem with low engine oil pressure. This could be due to low oil levels or a malfunctioning oil pressure sensor. Ignoring this code can lead to engine damage.

Fault Code 202 – Hydraulic Pressure Low

Code 202 relates to issues with low hydraulic pressure. It may result from hydraulic fluid leaks or a faulty hydraulic pump. Addressing this promptly is vital for equipment operation.

Fault Code 303 – Overheating Warning

Code 303 warns of potential overheating issues. It may stem from coolant leaks, a malfunctioning radiator, or a faulty temperature sensor. Overheating can cause significant damage to your Kubota machinery.

How to Interpret Kubota Fault Codes

Interpreting Kubota fault codes involves decoding 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. Consult your equipment’s manual or a professional mechanic for accurate interpretation.

Troubleshooting and Resolving Kubota Fault Codes

DIY Fixes for Minor Faults

Some Kubota 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 authorized service center. They possess the expertise and diagnostic tools needed to pinpoint and resolve intricate issues accurately.

Preventing Kubota Fault Codes

Prevention is often the best strategy when dealing with Kubota 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 Kubota maintenance not only prevents fault codes but also ensures the longevity and optimal performance of your Kubota equipment. By following a proactive maintenance schedule, you can avoid costly repairs and downtime.

Unlocking Efficiency: The 30 Min DPF Clean Advantage

Navigating the complexities of heavy machinery can be a daunting task, especially when grappling with the intricacies of fault codes on your Kubota equipment. However, fret not! A beacon of hope shines brightly on the horizon, and it goes by the name of 30 Min DPF Clean. We offer unmatched 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 recognize 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, coupled with outstanding DPF cleaning services, makes us the logical choice for those looking to extend the lifespan of their Kubota 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 Kubota 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 Kubota fault codes empowers you to take control of your equipment’s health and performance. Whether you’re a seasoned mechanic or an equipment owner, decoding these codes is crucial for ensuring the smooth operation of your Kubota machinery. Don’t let fault codes leave you perplexed—decode them, address the issues, and keep your equipment running at its best.

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FAQs About Kubota Fault Codes

What are Kubota fault codes?

Kubota fault codes are alphanumeric combinations that represent specific issues within Kubota equipment and its components.

Can I continue operating my Kubota equipment with a fault code?

Operating equipment with a fault code depends on its severity. Some codes may indicate minor issues, while others may signal potential equipment or safety concerns. It’s best to address fault codes promptly to prevent further damage.

How often should I check for fault codes on my Kubota machinery?

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

Are all Kubota fault codes serious?

Not all fault codes carry the same level of severity. Some may be related to minor sensor glitches, while others could indicate critical equipment or safety problems. Consult a professional to determine the seriousness of a specific code.

Can fault codes be cleared without fixing the issue?

While it’s possible to clear fault codes, it’s crucial 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 Kubota equipment and related services, visit the official Kubota website.