Cummins ISB CM850 (2003-06) Fault Code: 731 (Auto) PID: SID 64 SPN: 732 FMI: 7 Engine Speed Sensor/Position Camshaft and Crankshaft Misalignment – Mechanical System Not Responding Properly or Out of Adjustment. Mechanical misalignment between the crankshaft and camshaft engine speed sensors. This fault will become active anytime the ECM receives a signal from both the primary EPS (crankshaft sensor) and the backup EPS (camshaft sensor), and the ECM determines that the camshaft and crankshaft signals are not in the correct phase. If this fault code is active immediately following a repair that included camshaft removal, it is likely that...

Cummins ISB CM850 (2003-06) Fault Code: 731 (Marine) PID: SID 64 SPN: 723 FMI: 7 Engine Speed Sensor/Position Camshaft and Crankshaft Misalignment – Mechanical System Not Responding Properly or Out of Adjustment. Mechanical misalignment between the crankshaft and camshaft engine speed sensors. This fault will become active anytime the ECM receives a signal from both the primary EPS (crankshaft sensor) and the backup EPS (camshaft sensor), and the ECM determines that the camshaft and crankshaft signals are not in the correct phase. If this fault code is active immediately following a repair that includes camshaft removal, it is likely that...

Cummins ISB CM850 (2003-06) Fault Code: 757 PID: SPN: 611 FMI: 11 Engine Control Module Data Lost – Condition Exits. Severe loss of data from the ECM. The ECM is located on the left side of the engine, near the front of the engine. The ECM is connected to the battery by the ECM power harness. This direct link provides a constant power supply for the ECM. The location of the battery will vary with the OEM. Refer to the OEM troubleshooting and repair manual. Possible repairs: 1)Charge or replace the battery.2)Tighten the loose connections and clean the terminals.3)Repair or...

Cummins ISB CM850 (2003-06) Fault Code: 778 PID: SID 64 SPN: 723 FMI: 2 Engine Speed Sensor (Camshaft) Error – Data Erratic, Intermittent, or Incorrect. The ECM has detected an error in the camshaft position sensor signal. This fault is recorded when the ECM does not receive a signal from the camshaft position sensor or the signal the ECM receives is degraded. Possible causes: 1)Open circuit on the supply, signal, or return circuits in the sensor, engine harness, or ECM2)Short circuits to ground or return circuits in the sensor, engine harness, or ECM3)Short circuits to voltage source in the sensor,...

Cummins ISB CM850 (2003-06) Fault Code: 779 PID: SID 51 SPN: 703 FMI: 11 Auxiliary Equipment Sensor Input #3 (OEM Switch) – Root Cause Not Known. This fault code is activated when the pressure or temperature input from the OEM sensor exceeds the engine protection limit defined by the OEM. An engine power derate is possible depending on the OEM application. Possible repairs: 1)Replace the OEM harness. Cummins ISB CM850 (2003-06) Fault Code: 778 PID: SID 64 SPN: 723 FMI: 2 Engine Speed Sensor (Camshaft) Error – Data Erratic, Intermittent, or Incorrect. The ECM has detected an error in the...