Cummins ISB CM850 (2003-06) Fault Code: 2964 PID: 105 SPN: 105 FMI: 15 Intake Manifold Temperature High – Data Valid But Above Normal Operating Range – Least Severe Level. Intake manifold air temperature signal indicates intake manifold air temperature above engine protection warning limit. The intake manifold air temperature sensor measures the temperature of the charge-air as it passes through the intake manifold. Possible causes: 1)Plugged charge-air cooler fins2)Restricted airflow through the charge-air cooler3)Undersized charge-air cooler4)High turbocharger compressor outlet temperature. The sensor return configuration for Euro 4 ISB engines has been changed for automotive wiring harnesses manufactured from February 2012...

Cummins ISB CM850 (2003-06) Fault Code: 297 PID: 223 SPN: 1388 FMI: 3 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: 296 PID: 223 SPN: 1388 FMI: 14 Auxiliary Pressure Sensor Input 1 – Special Instructions Cummins ISB CM850 (2003-06) Fault Code: 295 PID: 108 SPN: 108 FMI: 2 Barometric...

Cummins ISB CM850 (2003-06) Fault Code: 2973 PID: 102 SPN: 102 FMI: 2 Intake Manifold Pressure Sensor Circuit – Data Erratic, Intermittent, or Incorrect. The electronic control module (ECM) has detected an intake manifold pressure signal that is too high or too low for present engine operating conditions. The intake manifold pressure sensor monitors pressure in the intake manifold. This fault is set active when the intake manifold pressure is too high or too low for the present engine operating conditions. The ECM compares the intake manifold pressure reading to turbocharger speed (estimated by the ECM in some engines) to...

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: 297 PID: 223 SPN: 1388 FMI: 3 Auxiliary Pressure Sensor Input 1 Circuit – Voltage Above Normal, or Shorted to High Source. High signal voltage detected at the OEM...