Cumminz

Cummins ISB CM850 (2003-06) Fault Code: 238 PID: SID 232 SPN: 611 FMI: 4 Sensor Supply 3 Circuit – Voltage Below Normal, or Shorted to Low Source. Low voltage detected on the +5 volt sensor supply circuit to the engine speed sensor. Low voltage on the +5 VDC supply line can be caused by a short circuit to ground in a supply line, a short circuit between a supply line or a return line, a failed sensor, or a failed ECM power supply. Possible repairs: 1)Replace the engine speed sensor.

Cummins ISB CM850 (2003-06) Fault Code: 2381 PID: SPN: 2795 FMI: 4 Turbocharger position sensor circuit – shorted high. High signal voltage detected at the turbocharger position sensor circuit. The turbocharger position 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. Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Signal shorted to sensor supply or battery voltage3)Failed ECM4)Failed VGT position sensor. Possible repairs: 1)Replace the turbocharger position sensor.2)Repair or replace the engine harness.3)Replace the ECM.

Cummins ISB CM850 (2003-06) Fault Code: 2382 PID: SPN: 2795 FMI: 4 Turbocharger position sensor circuit – shorted low. Low signal voltage detected at the turbocharger position sensor circuit. The turbocharger position 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. Possible causes: 1)Signal circuit open or shorted to ground2)Supply circuit open or shorted to ground3)Sensor shorted to ground. Possible repairs: 1)Replace the turbocharger position sensor.2)Repair or replace the engine harness.3)Replace the ECM.

Cummins ISB CM850 (2003-06) Fault Code: 2383 PID: SID 27 SPN: 641 FMI: 5 Variable Geometry Turbocharger actuator circuit – current below normal, or open circuit. The ECM monitors the voltage level of this circuit and logs a fault code if the voltage level indicates an open circuit or short to voltage source is present. This fault is always set inactive when the keyswitch is turned on. If the fault condition reoccurs while the keyswitch is in the ON position, the fault code will be set active. Since active faults are set inactive at key-on, this troubleshooting tree should be...

Cummins ISB CM850 (2003-06) Fault Code: 2384 (ISB) PID: SID 27 SPN: 641 FMI: 4 VGT actuator driver circuit – voltage below normal, or shorted to low source. A possible cause of this fault is the turbocharger actuator signal (+ or -) leads can be shorted to ground in the harness, motor, or the ECM. Do not supply voltage of any kind to the exhaust gas recirculation (EGR) valve motor. This circuit uses a pulse-width-modulated signal and direct voltage can permanently damage the motor. Possible repairs: 1)Replace the turbocharger.2)Repair or replace the engine harness.3)Replace the ECM.4)The removal and reinstallation of...