Cummins ISM CM870 (2003-06) Fault Code: 778 PID: S64 SPN: 723 FMI: 2/2 Engine Camshaft Speed / Position Sensor - Data Erratic, Intermittent, or Incorrect.? The ECM has detected a loss of signal from the camshaft position sensor.

This fault is logged when the ECM does not receive a valid camshaft position signal.

Possible repairs:

1)Open or short circuit of the +5 volt supply, signal, or return wire in the engine harness
2)Damaged or failed camshaft position sensor.

Possible repairs:

1)Replace the engine wiring harness.
2)Replace the camshaft position sensor.
3)Inspect the camshaft tone wheel/gear teeth for damage or spinning.
4)Replace the ECM.

Cummins ISM CM870 (2003-06) Fault Code: 731 PID: S064 SPN: 723 FMI: 7/7 Engine Speed Sensor and Camshaft Position Sensor - Mechanical Misalignment Between Camshaft and Crankshaft Sensors. Engine position signal from the engine speed sensor and camshaft position sensor do not match.

Cummins ISM CM870 (2003-06) Fault Code: 692 PID: S151 SPN: 1172 FMI: 4/4 Turbocharger 1 Compressor Intake Temperature Circuit - Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at turbocharger compressor intake air temperature circuit.

Cummins ISM CM870 (2003-06) Fault Code: 691 PID: S151 SPN: 1172 FMI: 3/3 Turbocharger Number 1 Compressor Inlet Temperature Sensor Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at the turbocharger compressor inlet air temperature circuit.

Cummins ISM CM870 (2003-06) Fault Code: 689 PID: P190 SPN: 190 FMI: 2/2 Engine Crankshaft Speed/Position - Data Erratic, Intermittent, or Incorrect. The ECM has detected an error in the engine speed signal.

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