Cummins ISX CM870 (2003-06) Fault Code: 2311 PID: S18 SPN: 633 FMI: 11/31 Fueling Actuator Number 1 Circuit Error. Error detected on the front fueling actuator circuit.

Possible causes:

1)Open circuit in the engine harness, connectors, or actuator
2)Short circuit to ground in the engine harness or actuator
3)Short circuit to voltage source in the engine harness
4)Low or high resistance in the actuator.

Possible repairs:

1)Replace the fueling actuator.
2)Repair or replace the engine harness.
3)Replace the ECM.

Cummins ISX CM870 (2003-06) Fault Code: 2278 PID: S27 SPN: 641 FMI: 4/4 Turbocharger Control Valve Circuit - shorted low. Low voltage detected at turbocharger control valve circuit.

Cummins ISX CM870 (2003-06) Fault Code: 2277 PID: S27 SPN: 641 FMI: 3/3 Variable Geometry Turbocharger Actuator Driver Circuit - Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at turbocharger control valve circuit.

Cummins ISX CM870 (2003-06) Fault Code: 2274 PID: P411 SPN: 411 FMI: 4/4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the EGR differential pressure sensor circuit.

Cummins ISX CM870 (2003-06) Fault Code: 2273 PID: P411 SPN: 411 FMI: 3/3 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at the EGR differential pressure sensor circuit.

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