ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)

NOTE: Following Cummins engine codes are pointed out in two ways: First the John Deere DTCs and afterwards the Cummins SFCs (Service Fault Codes).

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 91 19 287 1 Stop Accelerator Pedal Position indicates that armrest control unit has detected a DTC concerning engine speed / engine CAN failure. The engine will only idle.
ECU 94 03 546 2 Warning Fuel Pressure Sensor Voltage High indicates that high voltage was detected on the fuel pressure sensor circuit. Engine will run derated.
ECU 94 04 547 2 Warning Fuel Pressure Sensor Voltage Low indicates that low voltage was detected on the fuel pressure sensor circuit. Engine will run derated.
ECU 94 16 449 2 Warning Excessive Fuel Supply Pressure indicates excessive fuel supply pressure detected at the fuel pressure sensor. Engine may have black smoke and will run derated.
ECU 94 18 482 2 Warning Low Fuel Supply Pressure indicates that low fuel supply pressure was detected at the fuel pressure sensor circuit. Engine may not start, may have low power, may have white smoke or run rough.
ECU 97 03 428 2 Warning Water In Fuel Signal Voltage High indicates that high voltage was detected at water in fuel sensor circuit. None on performance.
ECU 97 04 429 2 Warning Water In Fuel Signal Voltage Low indicates that engine protection torque derate is active. None on performance.
ECU 97 15 418 3 Maintenance Water In Fuel Detected indicates that water has been detected in fuel system. Possible white smoke, or hard starting.
ECU 100 01 415 1 Stop Engine Oil Pressure Below Limit (Very Low Oil Pressure) indicates oil pressure below the very low oil pressure engine protection limit. Progressive power derate with increasing time after alert.

 

OUZXMAY,00005FE -19-01NOV03-1/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 100 02 435 2 Warning Engine Oil Pressure indicates that an error in the oil pressure sensor signal was detected by the ECU. None on performance. No engine protection for oil pressure.
ECU 100 03 135 2 Warning Engine Oil Pressure Voltage High indicates high voltage was detected at oil pressure sensor circuit. No engine protection for oil pressure.
ECU 100 04 141 2 Warning Engine Oil Pressure Voltage Low indicates that low voltage was detectecd at oil pressure sensor circuit. No engine protection for oil pressure.
ECU 100 18 143 2 Warning Engine Oil Pressure Below Limit (Low Oil Pressure) indicates that oil pressure is below the low oil pressure engine protection limit. Progressive power and speed derate.
ECU 102 02 433 2 Warning Intake Manifold Pressure Reading High means that intake manifold pressure sensor voltage is indicating a high presssure reading. Engine will run derated.
ECU 102 03 122 2 Warning Intake Manifold Pressure Voltage High indicates that high voltage was detected at intake manifold pressure sensor circuit. Derate in power output of the engine.
ECU 102 04 123 2 Warning Intake Manifold Pressure Voltage Low indicates that low voltage was detected at intake manifold pressure sensor circuit. Derate in power output of the engine.
ECU 103 16 595 2 Warning Turbocharger Overspeed Protection indicates that a turbocharger overspeed protection fault was detected. Engine will run derated.
ECU 105 00 155 1 Stop Intake Manifold Temperature Above Critical Threshold indicates intake manifold temperature above critical threshold of 85 °C (185 °F). Progressive power derate with increasing time after alert.
ECU 105 03 153 2 Warning Intake Manifold Temperature Voltage High indicates that high voltage was detected at intake manifold temperature sensor circuit. Possibly white smoke, fan will stay on.

 

OUZXMAY,00005FE -19-01NOV03-2/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 105 04 154 2 Warning Intake Manifold Temperature Voltage Low indicates that low voltage was detected at intake manifold temperature sensor circuit. Possibly white smoke, fan will stay on.
ECU 108 02 295 2 Warning Ambient Air Pressure Error indicates that an error in the ambient air pressure sensor circuit was detected by the ECU. Engine will run derated.
ECU 108 03 221 2 Warning Ambient Air Pressure Voltage High indicates that high voltage was detected at ambient air pressure sensor circuit. Hard starting, low power, rough idle or white smoke.
ECU 108 04 222 2 Warning Ambient Air Pressure Voltage Low indicates that low voltage was detected at ambient air pressure sensor circuit. Derate in power output of the engine.
ECU 110 00 151 1 Stop Engine Coolant Temperature Above Critical Threshold indicates that coolant temperature is above critical threshold of 104 °C (219.2 °F). Progressive power derate with increasing time after alert.
ECU 110 03 144 2 Warning Engine Coolant Temperature Voltage High indicates that high voltage was detected at coolant temperature sensor circuit. Possibly white smoke, fan will stay on.
ECU 110 04 145 2 Warning Engine Coolant Temperature Voltage Low indicates that low voltage was detected at coolant temperature sensor circuit. Possibly white smoke, fan will stay on.
ECU 111 01 235 1 Stop Coolant Level indicates that coolant level is below normal range. Progressive power derate with increasing time after alert.
ECU 111 02 422 2 Warning Coolant Level Voltage High / Low means voltage detected simultaneously on both coolant level high and low signal circuits or no voltage detected on both circuits. No engine protection for coolant level.
ECU 157 03 451 2 Warning Front Rail Pressure Sensor Voltage High indicates that high voltage was detected on the front rail pressure sensor circuit. Engine will run derated.
ECU 157 04 452 2 Warning Front Rail Pressure Sensor Voltage Low indicates that low voltage was detected on the front rail fuel rail pressure circuit. Engine will run derated.

 

OUZXMAY,00005FE -19-01NOV03-3/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 157 07 755 2 Warning Front Three Cylinders Incorrect Fueling indicates that incorrect fueling was detected on the front three cylinders. Engine will misfire.
ECU 157 16 553 2 Warning Front Three Cylinders Rail Pressure High indicates that unexpectedly high rail pressure was detected on the front three cylinders. Engine will return to idle speed.
ECU 157 18 559 2 Warning Front Three Cylinders Rail Pressure Low indicates that unexpectedly low rail pressure was detected on the front three cylinders. Low power or rough idle.
ECU 166 02 951     Power Imbalance Between Cylinders indicates that a power imbalance between cylinders was detected by the ECU. Engine may have rough idle or misfire.
ECU 168 16 442 2 Warning Battery Voltage Low indicates that battery voltage is below normal operating level. None on performance.
ECU 168 18 441 2 Warning Battery Voltage High indicates that battery voltage is above normal operating level. Possibly no noticeable performance effect, or possibility of rough idle.
ECU 175 00 214 1 Stop Engine Oil Temperature Above Critical Threshold indicates that oil temperature is above critical threshold of 123,9 °C (255.02 °F). Progressive power derate with increasing time after alert.
ECU 175 03 212 2 Warning Engine Oil Temperature Voltage High indicates that high voltage was detected at oil temperature sensor circuit. No engine protection for oil temperature.
ECU 175 04 213 2 Warning Engine Oil Temperature Voltage Low indicates that low voltage was detected at oil temperature sensor circuit. No engine protection for oil temperature.
ECU 190 00 234 1 Stop Engine Speed Signal High indicates engine speed greater than 2650 rpm, DTC / SFC remains active until engine speed drops below 2300 rpm. Fuel shutoff valve closes until engine speed falls to 2300 rpm.
ECU 190 02 115 1 Stop No Engine Speed Signal indicates no engine speed signal detected at both engine position sensor circuits. Engine may take longer to start.

 

OUZXMAY,00005FE -19-01NOV03-4/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 190 10 121 2 Warning Engine Speed indicates no engine speed signal detected at one engine position sensor circuit. Hard starting, low power, rough idle or white smoke.
ECU 620 03 227 2 Warning Voltage Supply High indicates that high voltage was detected on the ECU voltage supply line to some sensors. Engine will run derated.
ECU 620 04 187 2 Warning Voltage Supply Low indicates that low voltage was detected on the ECU voltage supply line to some sensors. Engine will run derated.
ECU 627 02 434 2 Warning Power Supply indicates that battery voltage is too low or insufficient amount of time for battery power to the ECU for powering down after key off. Possibly no noticeable performance effect, or possibility of engine dying, or others.
ECU 629 12 111 /343 1 / 2 Stop / Warning ECU Error indicates an internal ECU error related to memory hardware failures or internal microprocessor communication failures / indicates an internal ECU error. Engine will not start / Possibly none on performance or severe data loss.
ECU 630 02 341 2 Warning Calibration Memory indicates severe loss of data from the ECU. Fault information, trip information, others.
ECU 632 03 255 2 Warning Fuel Shutoff Valve Voltage High indicates that externally supplied voltage was detected going to the fuel shutoff supply circuit.  
ECU 632 04 254 1 Stop Fuel Shutoff Valve Voltage Low indicates that less than 6 V was detected at fuel shutoff driver and an excessive current draw from ECU or faulty power supply. ECU turns off fuel shutoff supply voltage. Engine will shut down.
ECU 632 07 259 2 Warning Fuel Shutoff Valve Stuck / Leaking indicates that fuel shutoff valve is stuck open mechanically or leaking. Engine will run derated.
ECU 633 05 378 2 Warning Fuel Control Valve #1 Current Low or Open Circuit indicates that low current or open circuit was detected at front fueling actuator circuit. Engine will only run using the rear three cylinders.

 

OUZXMAY,00005FE -19-01NOV03-5/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 633 06 379 2 Warning Fuel Control Valve #1 Current High indicates that high current was detected at front fueling actuator circuit. Engine will only run using the rear three cylinders.
ECU 635 05 394 2 Warning Timing Actuator #1 Current Low or Open Circuit indicates that low current or open circuit was detected at front timing actuator circuit. Engine will only run using the rear three cylinders.
ECU 635 06 395 2 Warning Timing Actuator #1 Current High indicates that high current was detected at front timing actuator circuit. Engine will only run using the rear three cylinders.
ECU 639 02 426     ECU Communication Lost indicates that communication between ECU and CAN-Bus has been lost. None on perfomance, J1939 datalink may not operate.
ECU 639 09 285 2 Warning ECU Communication Timeframe indicates that ECU expected information from CAN-Bus but did not receive it soon enough or did not receive it at all. At least one multiplexed device will not operate properly.
ECU 639 13 286 2 Warning ECU Communication indicates that ECU expected information from CAN-Bus but only received a portion of the neccessary information. At least one multiplexed device will not operate properly.
ECU 723 02 753 2 Warning indicates that ECU expected information from CAN-Bus but only received a portion of the necessary information. indicates that the engine position signal from the crankshaft and the camshaft engine position sensors do not match up. Low power or rough idle or white smoke.
ECU 723 07 731 2 Warning Camshaft and Crankshaft Sensor Misalignment indicates that a mechanical misalignment between camshaft and crankshaft sensors (engine speed / position #2) was detected.  
ECU 1043 03 387 2 Warning ECU Voltage High indicates that high voltage was detected on the ECU voltage supply line to the throttle(s). Engine will only idle.

 

OUZXMAY,00005FE -19-01NOV03-6/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 1043 04 443 / 284 2 Warning ECU Voltage Low / Crankshaft Engine Position Sensor Voltage Incorrect indicates that low voltage was detected on the ECU voltage supply line to the throttle(s) / indicates that incorrect voltage was detected on the ECU voltage supply line to the crankshaft engine position sensor. Engine will only idle / Engine may not run or will run derated. Possibly hard starting, low power, white smoke.
ECU 1043 11 496 2 Warning Camshaft Engine Position Sensor Voltage Incorrect indicates that an incorrect voltage was detected on the ECU voltage supply line to the camshaft engine position sensor. Engine may not run, be hard to start or will run derated.
ECU 1079 03 386 2 Warning Sensor Supply Voltage High indicates that high voltage was detected on the ECU voltage supply line to some sensors. Engine will run derated.
ECU 1079 04 352 2 Warning Sensor Supply Voltage Low indicates that low voltage was detected at sensor. Indicates a faulty power supply from ECU for the sensors. Engine will run derated.
ECU 1176 16 618 2 Warning Turbocharger Intake Restriction indicates turbocharger intake restriction high due to a plugged air filter or there is another restriction in the intake system.  
ECU 1188 03 465 2 Warning Turbocharger Wastegate 1 Shorted High indicates that wastegate 1 is shorted high.  
ECU 1188 04 466 2 Warning Turbocharger Wastegate 1 Voltage Low indicates that less than 6 V was detected at wastegate actuator #1, indicating excessive current draw or faulty ECU output circuit. Engine will run derated
ECU 1189 03 491 2 Warning Turbocharger Wastegate 2 Shorted High indicates that wastegate 2 is shorted high.  
ECU 1189 04 492 2 Warning Turbocharger Wastegate 2 Shorted Low indicates that wastegate 2 is shorted low.  

 

OUZXMAY,00005FE -19-01NOV03-7/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 1244 05 396 2 Warning Fuel Control Valve #2 Current Low or Open Circuit indicates that low current or open circuit was detected at rear fueling actuator circuit. Engine will only run using the front three cylinders.
ECU 1244 06 397 2 Warning Fuel Control Valve #2 Current High indicates that high current was detected at rear fueling actuator circuit. Engine will only run using the front three cylinders.
ECU 1245 05 398 2 Warning Timing Actuator #2 Current Low or Open Circuit indicates that low current or open circuit was detected at rear timing actuator circuit. Engine will only run using the front three cylinders.
ECU 1245 06 399 2 Warning Timing Actuator #2 Current High indicates that high current was detected at rear timing actuator circuit. Engine will only run using the front three cylinders.
ECU 1319 02 419 2 Warning Intake Manifold Pressure indicates that an error in the intake manifold pressure sensor signal was detected by the ECU. Engine will run derated.
ECU 1349 03 483 2 Warning Rear Rail Pressure Sensor Voltage High indicates that high voltage was detected on the rear rail pressure sensor circuit. Engine will run derated.
ECU 1349 04 484 2 Warning Rear Rail Pressure Sensor Voltage Low indicates that low voltage was detected on the rear rail pressure sensor circuit. Engine will run derated.
ECU 1349 07 758 2 Warning Rear Three Cylinders Incorrect Fueling indicates that incorrect fueling was detected on the rear three cylinders. Engine will misfire.
ECU 1349 16 485 2 Warning Rear Three Cylinders Rail Pressure High indicates unexpectedly high rail pressure was detected on the rear three cylinders. Engine will return to idle speed.

 

OUZXMAY,00005FE -19-01NOV03-8/9

ECU - Engine Control Unit Diagnostic Trouble Codes / Service Fault Codes (Cummins Control Unit)
Control Unit SPN FMI SFC Pri. Indicator Light Description Effect
ECU 1349 18 486 2 Warning Rear Three Cylinders Rail Pressure Low indicates unexpectedly low rail pressure was detected on the rear three cylinders. Low power or rough idle.
ECU 1383 14 299     Engine Shutdown indicates an engine shutdown by device other than key switch before proper engine cool down due to an overload condition. No action by the ECU.

 

OUZXMAY,00005FE -19-01NOV03-9/9