Cumminz

Cummins ISB CM850 (2003-06) Fault Code: 2976 PID: SPN: 3361 FMI: 2 Dosing Control Unit Temperature – Data Erratic, Intermittent, or Incorrect. An internal error has been detected in the catalyst dosing control unit. Fault Code 2976 is triggered when the dosing control unit internal temperature sensor is reading a different value than the other temperature sensors on the engine. This indicates a problem with the internal temperature sensor of the dosing control unit. Dosing control unit electrical supply issues that cause the dosing control unit to remain powered when the key switch is turned OFF can cause Fault Code...

Cummins ISB CM850 (2003-06) Fault Code: 298 PID: 223 SPN: 1388 FMI: 4 Auxiliary Pressure Sensor Input 1 Circuit – Voltage Above Normal, or Shorted to High Source. High signal voltage detected at the OEM pressure circuit. Possible causes: 1)Open return circuit in the harness, connectors, or sensor.2)signal circuit shorted to sensor supply or battery voltage. Possible repairs: 1)Replace the OEM pressure sensor.2)Replace the ECM.

Cummins ISB CM850 (2003-06) Fault Code: 319 PID: 251 SPN: 251 FMI: 2 Real-Time Clock Power Interrupt – Data Erratic, Intermittent or Incorrect. Real-time clock lost power. This fault indicates that the real-time clock in the ECM lost power. Possible causes for this fault are weak or failed real-time clock battery, failed wiring or connectors between the battery and ECM, or the engine is not equipped with a real-time clock battery and the vehicle battery power to the ECM is lost. NOTE:If the Real Time Clock is supplied by the OEM via a CAN BUS and a battery backup is...

Cummins ISB CM850 (2003-06) Fault Code: 322 PID: SID 1 SPN: 651 FMI: 5 Injector Solenoid Driver Cylinder 1 Circuit – Current Below Normal or Open Circuit. High resistance or no current detected at number 1 injector driver or RETURN pin. 1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the faulty cylinders(s).2)Fault deactivation: The ECM will attempt to enable any disabled injector...

Cummins ISB CM850 (2003-06) Fault Code: 323 PID: SID 5 SPN: 655 FMI: 5 Injector Solenoid Driver Cylinder 5 Circuit – Current Below Normal or Open Circuit. High resistance or no current detected at number 5 injector driver or RETURN pin. 1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the faulty cylinders(s).2)Fault deactivation: The ECM will attempt to enable any disabled injector...