Cummins ISX 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.

Possible causes:

1)Loose, missing, or corroded grounds2)Damaged tone wheel teeth3)Loose crankshaft tone wheel4)Static timing misset5)Front gear train slippage6)Misoriented engine speed or camshaft position sensor7)Electrical noise.

Possible repairs:

1)Replace the speed or position sensor.2)Replace the crankshaft or injector camshaft, whichever has malfunctioned.

Cummins ISX 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 ISX 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 ISX 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.

Cummins ISX CM870 (2003-06) Fault Code: 687 PID: P103 SPN: 103 FMI: 1/18 Turbocharger 1 Speed – Data Valid But Below Normal Operating Range – Moderately Severe Level. Low turbocharger speed detected by the engine control module (ECM).

Cummins ISX CM870 (2003-06) Fault Code: 649 PID: S153 SPN: 1378 FMI: 11/31 Change Lubricating Oil and Filter. Maintenance Monitor feature indicates the engine is due for a lubricating oil and filter change.

Cummins ISX CM870 (2003-06) Fault Code: 598 PID: P167 SPN: 167 FMI: 1/1 Electrical Charging System Voltage – Data Valid But Below Normal Operating Range – Most Severe Level. Very low battery voltage detected by the battery voltage monitor feature.

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