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,...

Cummins ISB CM850 (2003-06) Fault Code: 1242 PID: SPN: 91 FMI: 2 Accelerator Pedal or Lever Position Sensor Number 1 and Number 2 – Data Erratic, Intermittent, or Incorrect. Accelerator position sensors numbers 1 and 2 are reading different values. 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: 131 PID: 91 SPN: 91 FMI: 3 Accelerator Pedal or Lever Position Sensor Circuit – Shorted High. High voltage detected at accelerator pedal or lever position circuit. If troubleshooting an intermittent accelerator problem: The accelerator pedal or lever position sensor signal voltage can be monitored with the INSITE? electronic service tool, while flexing the harness to locate the intermittent connection. Possible causes: 1)Accelerator pedal or lever position signal circuit shorted to battery or +5 VDC supply2)Open accelerator pedal or lever return circuit in the harness or connections3)Accelerator supply shorted to battery4)Failed accelerator pedal or...

Cummins ISB CM850 (2003-06) Fault Code: 132 PID: 91 SPN: 91 FMI: 4 Accelerator Pedal or Lever Position Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at accelerator pedal or lever position signal circuit. If troubleshooting an intermittent accelerator problem: The accelerator pedal or lever position sensor signal voltage can be monitored with the INSITE? electronic service tool, while flexing the harness to locate the intermittent connection. Intermittent connections will show up as abrupt changes in signal voltage displayed by INSITE? electronic service tool. Possible causes: 1)Accelerator pedal or lever position signal shorted to...