Cummins ISM 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.

Turbocharger Control Valve Command can be monitored with the INSITE? electronic service tool. This parameter represents the ECM command to the turbocharger control valve which in turn controls the variable geometry actuator position.

Possible causes:

1)Signal circuit short circuit to ground in the engine harness, connectors, or turbocharger control valve.

Possible repairs:

1)Replace the turbocharger control valve.
2)Replace the ECM.
3)Repair or replace the engine harness.

Cummins ISM 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 ISM 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 ISM 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.

Cummins ISM CM870 (2003-06) Fault Code: 2272 PID: P27 SPN: 27 FMI: 4/4 Exhaust Gas Recirculation (EGR) Valve Position Circuit - Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR valve position sensor circuit.

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