Kubota Tractor Engine Error Codes (108 – 2310 DTC Fault Errors)

Kubota tractors are renowned for their reliability and performance, but like any complex machinery, they can encounter issues from time to time. When a problem arises, Kubota tractors are equipped with advanced diagnostic systems that can pinpoint the issue and provide valuable information through Engine Error Codes, also known as Diagnostic Trouble Codes (DTCs). These codes are your tractor’s way of communicating what’s wrong, making it easier for owners and technicians to diagnose and resolve problems efficiently.

Kubota Tractor Engine Error Codes (108 - 2310 DTC Fault Errors)

In this comprehensive guide, we’ll delve into Kubota Tractor Engine Error Codes, understanding what they mean, how to interpret them, and the necessary steps to address these issues. Whether you’re a seasoned tractor operator or new to the world of agriculture and farming machinery, understanding these error codes is a valuable skill. It can help keep your Kubota tractor running smoothly, minimize downtime, and ensure optimal performance, all while potentially saving on costly repairs.

Kubota Tractor Engine DTC Error Codes (108 – 2310)

So, let’s embark on a journey through the world of Kubota Tractor Engine Error Codes, demystifying the language of your tractor’s diagnostics and empowering you to keep your equipment in prime working condition.

DTC Fault Code 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 psia)

• 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 Judgment • 2 sec • 60 sec • 1 sec
System Action • AL Disable KC

• Power derate 1

• AL Disable

• Power derate 1

• AL Disable

• Power derate 1

Engine Warning Light ON ON ON
DTC Fault Code 113 116 117
Name IAT ECT/CHT ECT/CHT
DTC Name IAT High Voltage ECT Higher Than Expected Stage 1 ECT/CHT 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 coolant 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 Judgment • 1 sec • 20 sec • 1 sec
System Action • AL Disable

• Power derate 1

• AL Disable

• Power derate 1

• AL Disable

• Power derate 1

Engine Warning Light ON ON ON
DTC Fault Code 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 % • TPS1 voltage < 0.200 V
Period for Judgment or Number of Occurrence for Judgment • 1 sec • 1 sec • 0.5 sec
System Action • AL Disable

• Power derate 1

• Shutdown • Shutdown
Engine Warning Light ON ON ON
DTC Fault Code 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 OFF 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)

• and RPM > 1000 min-1 (rpm)

• BP < 57.2 kPa [abs]

(0.584 kgf/cm2, 8.30 psia)

Period for Judgment or Number of Occurrence for Judgment • 0.5 sec • 120 sec • 1 sec
System Action • Shutdown • AL Disable

• Force idle

• AL Disable KC
Engine Warning Light ON ON ON
DTC Fault Code 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 0
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 psia)
• and MAP <= 682 kPa [abs]
(6.96 kgf/cm2, 99.0 psia)
Period for Judgment or Number of Occurrence for Judgment • 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 Fault Code 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 hot environment

• 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 Judgment • 3 updates • 1 sec • 1 sec
System Action • CL Disable

• AL Disable KC

• None • Power derate 2
Engine Warning Light ON ON ON
DTC Fault Code 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 Judgment • 1 sec • 30 sec • 1 sec
System Action • None • Power derate 2 • reduce throttle to limit speed
Engine Warning Light ON ON ON
DTC Fault Code 221 222 223
Name TPS TPS TPS
DTC Name TPS1 % Higher Than TPS2 % TPS2 Signal Voltage Low TPS2 Signal 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 Judgment • 1 sec • 0.5 sec • 0.5 sec
System Action • Shutdown • Shutdown • Shutdown
Engine Warning Light ON ON ON
DTC Fault Code 261 262 264
Name Injectors Injectors Injectors
DTC Name Injector Driver #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 Judgment • 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 Fault Code 265 267 268
Name Injectors Injectors Injectors
DTC Name Injector Driver #2 Short-To-Power Injector Driver #3 Open/Short-To-Ground Injector Driver #3 Short-To-Power
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 Judgment • 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 Fault Code 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 On
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 Judgment • 10 samples • 10 samples • 3 sec
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 Fault Code 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 On • Key On, Engine On • Key On, Engine On
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 Judgment • 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 Fault Code 341 342 359
Name Cam/Crank Sensors Cam/Crank Sensors Lockoff/Fuel Diagnostics
DTC Name Camshaft Input Signal Noise Loss of Camshaft Input Signal Fuel run-out longer than expected
J1939 SPN 723 723 632
FMI 2 4 31
MIL ON ON ON
Detected Item • Cam+ or Cam circuits in wrong connector terminal slot • Loss of feed voltage to Cam sensor

• loss of signal or ground circuits

• faulty sensor

DTC Set Preconditions • Key On, Engine On • Key On, Engine On • Key Off, Engine On
DTC Set Conditions • Number of invalid cam re-syncs 3

re-syncs

• within a time window of <= 700 ms

• No cam pulse in 2.0 cycles

• and RPM > 150 min-1 (rpm)

• Fuel run-out engine run time >

20000 ms

Period for Judgment or Number of Occurrence for Judgment • 1 sec • 1 sec • N/A
System Action • AL Disable KC • AL Disable KC • Shutdown
Engine Warning Light ON ON OFF
DTC Fault Code 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 Judgment • 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 Fault Code 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 Judgment • 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 Fault Code 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 Short
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 Judgment • 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 Fault Code 629 642 643
Name Fuel Pump Relay Control/Coil Fuel Pump Motor Feedback 5 V External 5 V External
DTC Name Fuel Pump Relay Coil Short-To-Power Sensor Supply Voltage 1 Low (5Vext1) Sensor Supply Voltage 1 High (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 Judgment • 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 Fault Code 652 653 686
Name 5 V External 5 V External Power Relay Control/Coil
DTC Name Sensor Supply Voltage 2 Low (5Vext2) Sensor 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 ground

• 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 Judgment • 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 Fault Code 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 overspeed condition, faulty

Crank sensor or input

• Engine 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 Judgment • 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 Fault Code 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, Engine 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 Judgment • 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 Fault Code 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 Judgment • 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 Fault Code 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 Judgment • 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 Fault Code 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 Judgment • 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 Fault Code 1166 1171 1172
Name Catalyst EPR Diagnostics EPR Diagnostics
DTC Name Catalyst inactive on NG EPR/CFV Regulation Pressure Higher than Expected 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 is too 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 <= CBTCBT_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 Judgment • 100 updates • 5 sec • 5 sec
System Action • CL Disable

• AL Disable KC

• AL Disable • AL Disable
Engine Warning Light ON ON ON
DTC Fault Code 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 520260 520260
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 recieved within

500 ms

• Voltage supply to EPR/CFV is >

33.0 VDC

• Voltage supply to EPR/CFV is <

18.0 VDC

Period for Judgment or Number of Occurrence for Judgment • 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 Fault Code 1176 1177 1611
Name EPR Diagnostics EPR Diagnostics 5V External
DTC Name EPR/CFV Internal Actuator Fault Detection EPR/CFV Internal Circuitry Fault Detection Sensor Supply Voltage (5Vext 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 Judgment • 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 Fault Code 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 Judgment • 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 ON OFF OFF
DTC Fault Code 1615 1616 1673
Name Internal Processor Diagnostics Internal Processor Diagnostics General System Diagnostics
DTC Name Microprocessor Failure-A/D Microprocessor Failure-Interrupt Calibration Configuration Error
J1939 SPN 629 629 1634
FMI 31 31 13
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 Judgment • N/A • N/A • N/A
System Action • Never Forget

• AL Disable KC

• Power derate 2

• Never Forget

• AL Disable KC

• Power derate 2

• Never Forget

• AL Disable KC

• Power derate 2

Engine Warning Light OFF OFF OFF
DTC Fault Code 2111 2112 2121
Name TPS TPS FPP
DTC Name Unable to Reach Lower TPS Unable to Reach Higher 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 Judgment • 1 sec • 1 sec • 1.5 sec
System Action • Shutdown • Shutdown • Power derate 2

• Low Rev Limit

Engine Warning Light ON ON ON
DTC Fault Code 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 Judgment • 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 Fault Code 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 Judgment • 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 Fault Code 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 Judgment • 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 Fault Code 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 Judgment • 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 Fault Code 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 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
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 Judgment • 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

How To Reset Kubota Tractor Engine Error Codes?

You can often reset Kubota Tractor Engine Error Codes, but it’s essential to understand when and how to do it properly. Resetting error codes should only be done after you have identified and resolved the underlying issue that triggered the code. Here are the general steps to reset Kubota Engine Error Codes:

  1. Identify and Resolve the Issue: Use your tractor’s user manual or diagnostic tool to determine the cause of the error code. Address the problem by fixing the issue, whether it’s related to fuel, air, electrical systems, or other components.
  2. Turn Off the Ignition: Ensure that the tractor’s ignition is in the “Off” position before attempting any reset procedure.
  3. Access the Diagnostic System: Depending on your Kubota tractor model, you may need to use a diagnostic tool or display module to access the error code and reset it. Refer to your tractor’s user manual for specific instructions on how to access the diagnostic system.
  4. Clear the Error Code: Once you’ve accessed the diagnostic system, locate the option to clear or reset error codes. Follow the on-screen or manual instructions to clear the code. This typically involves confirming that the issue has been resolved.
  5. Turn On the Ignition: After successfully resetting the error code, turn the tractor’s ignition back on to ensure that the code has been cleared. Check for any warning lights or messages on the instrument panel.
  6. Test the Tractor: Before resuming regular operation, start the tractor and run some tests to verify that the issue is indeed resolved and that the error code does not reappear.
  7. Monitor for Recurrence: Continue to monitor the tractor for any recurrence of the error code. If the code reappears, it may indicate an ongoing or unresolved issue that requires further investigation and repair.

Remember that resetting error codes without addressing the root cause can lead to more significant problems. It’s essential to ensure that the issue has been properly fixed before clearing the code. If you’re unsure about the troubleshooting and reset process, or if the issue persists, it’s advisable to contact a Kubota-authorized service technician for assistance.

Kubota Tractor Engine Error Codes FAQ

Error codes serve as a diagnostic tool to help tractor owners and technicians identify and address issues efficiently.

Kubota Tractor Engine Error Codes FAQ

They are designed to streamline the troubleshooting process and pinpoint the root cause of a problem, saving time and reducing repair costs.

Q1. How do I access Kubota Tractor Error Codes?

A: To access error codes on your Kubota tractor, you’ll typically need to connect a diagnostic tool or display module. The exact process can vary depending on your tractor model and the diagnostic system it uses. Refer to your tractor’s user manual for specific instructions.

Q2. What do Kubota Tractor Error Codes mean?

A: Each error code corresponds to a specific issue or malfunction. The meaning of the code is outlined in your tractor’s service manual or diagnostic tool user guide. You can also consult Kubota’s official resources or contact a Kubota service center for assistance in deciphering the codes.

Q3. How should I respond to Kubota Tractor Error Codes?

A: When you encounter an error code, consult your tractor’s manual to understand the issue. In some cases, it may be a minor problem that you can address yourself, such as checking fuel levels or cleaning filters. For more complex issues, it’s advisable to contact a Kubota-authorized service technician for proper diagnosis and repair.

Q4. Can I reset Kubota Tractor Error Codes?

A: Some error codes can be cleared or reset after the underlying issue is resolved. However, it’s crucial to ensure that the problem is genuinely fixed, as resetting the code without addressing the root cause may lead to more significant issues. Refer to your tractor’s manual or consult a technician for guidance on code clearing.

Q5. Are Kubota Tractor Error Codes covered by warranty?

A: The warranty coverage for error codes depends on various factors, including your tractor’s age, model, and warranty terms. Generally, error codes related to manufacturing defects or issues covered by the warranty may be repaired at no cost. Always check your warranty documentation or contact your local Kubota dealer for warranty-related inquiries.

Q6. How can I prevent Kubota Tractor Error Codes?

A: Regular maintenance, such as timely oil changes, filter replacements, and inspections, can help prevent many issues that trigger error codes. Following Kubota’s recommended maintenance schedule and operating guidelines can go a long way in minimizing the occurrence of error codes.

Q7. Where can I find more information about Kubota Tractor Error Codes?

A: Your tractor’s user manual, service manual, and Kubota’s official website are excellent sources for detailed information about error codes. Additionally, you can contact your local Kubota dealer or authorized service center for assistance and guidance on error code interpretation and resolution.

Comments: 2
  1. Andrew Harbert

    Hello, my Kubota L4060 compact tractor keeps displaying a P2414 code, what does that mean? Is this an Kubota engine problem?

    1. David R. Ledford (author)

      OBD-II fault code P2414 mean = O2 Sensor Exhaust Sample Error (Oxygen sensor failure). If the Oxygen Sensor reads too much O2 at part or full throttle, the Kubota engine computer assumes that the O2 sensor is installed incorrectly or there is an exhaust leak – error code P2414 will be set. Sometimes this sensor can give an error due to overheating of the EGR valve.

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