kubota fault code list

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.


*Please press the following to search through the Kubota fault code list: CTRL+ F

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


kubota dpf cleaning

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.

kubota regen problems

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.


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.

kubota dpf cleaning


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