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Cummins ISB CM850 (2003-06) Fault Code: 2351 PID: SID 146 SPN: 2791 FMI: 4 EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the EGR valve motor circuit. The ECM monitors the voltage level of the circuit and logs a fault code if the voltage level indicates a short to ground. This fault is always set inactive when the keyswitch is turned ON. If there is a failure of this circuit, the fault code will not be set active until the valve has been actuated. For these reasons, this troubleshooting tree must...

Cummins ISB CM850 (2003-06) Fault Code: 2352 PID: SID 146 SPN: 2791 FMI: 3 EGR Valve Control Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the EGR valve motor circuit. The ECM monitors the voltage level of the circuit and logs a fault code if the voltage level indicates a short to ground. This fault is always set inactive when the keyswitch is turned ON. If there is a failure of this circuit, the fault code will not be set active until the valve has been actuated. For these reasons this troubleshooting tree must...

Cummins ISB CM850 (2003-06) Fault Code: 2353 PID: SID 146 SPN: 2971 FMI: 6 Exhaust Gas Recirculation (EGR) valve control circuit – current above normal or grounded circuit. Excess current detected at the EGR valve motor output circuit. The ECM monitors the current draw of this circuit. If the ECM detects excessive current for a calibrated period of time, it records this fault. Possible causes: 1)EGR valve motor (+) or (-) leads shorted together in the engine harness, EGR valve motor, or ECM2)Low EGR valve motor internal resistance. Possible epairs: 1)Replace the EGR valve assembly.2)Repair or replace the engine harness.3)Replace...

Cummins ISB CM850 (2003-06) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 Exhaust Gas Recirculation (EGR) Valve Control – Mechanical System Not Responding Properly or Out of Adjustment. EGR valve motor does not respond or is slow to respond. The ECM monitors the duty cycle of the valve and logs a fault code if the duty cycle is too high. This fault is always set inactive when the keyswitch is turned ON. If there is a failure, the fault code will not be set active until the valve has been actuated. For these reasons, this troubleshooting tree must...

Cummins ISB CM850 (2003-06) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation (EGR) Differential Pressure Sensor – Data Valid but Above Normal Operating Range – Moderately Severe Level. EGR differential pressure sensor failed automatic calibration procedure or EGR differential pressure reading not valid for engine operating conditions. Possible causes: 1)A malfunctioning EGR differential pressure sensor2)A plugged or leaking low or high EGR differential pressure drilling3)A stuck open or closed EGR valve4)A damaged EGR connection tube hose5)A leak in the EGR connection tube hoses or tubes6)A damaged variable geometry turbocharger7)A damaged variable geometry actuator. Note: If Fault...