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Cummins ISX CM870 (2003-06) Fault Code: 2384 PID: S027 SPN: 641 FMI: 4 Variable geometry turbocharger actuator driver circuit – voltage below normal or shorted to low source. Low voltage detected at turbocharger control valve circuit.

Turbocharger control valve command can be monitored with 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 short circuit to ground2)Short circuit to ground in the turbocharger control valve.

Possible repairs:

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

Cummins ISX CM870 (2003-06) Fault Code: 2377 PID: S33 SPN: 647 FMI: 3/3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2376 PID: P412 SPN: 412 FMI: 4/4 Recirculated Exhaust Gas Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR temperature circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2375 PID: P412 SPN: 412 FMI: 3/3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at EGR temperature circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2374 PID: P95 SPN: 1029 FMI: 4/4 Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the exhaust gas pressure circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2373 PID: P95 SPN: 1209 FMI: 3/3 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2372 PID: P95 SPN: 95 FMI: 0/16 Fuel filter restriction moderately high – warning. Fuel filter is plugged or fuel inlet restriction is high.