Cumminz

Cummins ISB CM850 (2003-06) Fault Code: 1229 PID: SID 27 SPN: 2795 FMI: 2 VGT Position Sensor – Data erratic, intermittent, or incorrect. Intermittent variable geometry turbocharger (VGT) position information is being received by the electronic control module (ECM). This fault code is caused by an internal failure of the variable geometry turbocharger (VGT) position sensor. This failure causes erratic readings of variable geometry turbocharger (VGT) position. Possible repairs: 1)Replace the turbocharger position sensor.2)Replace the ECM.

Cummins ISB CM850 (2003-06) Fault Code: 123 PID: 102 SPN: 102 FMI: 4 Intake Manifold Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the intake manifold pressure circuit. The intake manifold pressure sensor shares SUPPLY and RETURN wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active. Before troubleshooting Fault Code 123, check for multiple faults. Possible causes: 1)Signal circuit open or shorted to ground in the engine harness or sensor2)SUPPLY line open or shorted to ground. The...

Cummins ISB CM850 (2003-06) Fault Code: 1239 PID: SPN: 2623 FMI: 3 Accelerator Pedal or Lever Position Sensor 2 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at accelerator pedal position number 2 signal circuit. Newer engines use two throttle position sensors to determine the throttle position. Older throttle pedals used a single throttle position sensor and an idle validation switch. If Fault Codes 132 and 1241 are active when the accelerator pedal is in the idle position and Fault Code 132 goes inactive and Fault Code 1239 goes active when the throttle is depressed,...

Cummins ISB CM850 (2003-06) Fault Code: 124 PID: 102 SPN: FMI: 0 Intake Manifold 1 Pressure Sensor Circuit – Data Valid But Above Normal Operating Range – Moderately Severe Level. Intake manifold pressure has exceeded the maximum limit for the given engine rating. This fault code become active when the intake manifold pressure exceeds the maximum pressure limit for a given engine rating. Possible causes: 1)Malfunctioning turbocharger wastegate2)Wastegate tampering3)Wrong turbocharger part4)Possible tampering of the fuel system or turbocharger system. The sensor return configuration for Euro 4 ISB engines has been changed for automotive wiring harnesses manufactured from February 2012 onward....

Cummins ISB CM850 (2003-06) Fault Code: 1241 PID: SPN: 2623 FMI: 4 Accelerator Pedal or Lever Position Sensor 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at accelerator pedal position number 2 signal circuit. Newer engines use two throttle position sensors to determine the throttle position. Older throttle pedals used a single throttle position sensor and an idle validation switch. If Fault Codes 132 and 1241 are active when the accelerator pedal is in the idle position and Fault Code 132 goes inactive and Fault Code 1239 goes active when the throttle is depressed,...