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.

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.

Related

Categories Cumminz, ISB CM850 (2003-06) Tags 06, 1, 1388, 2003, 223, 297, 3, Above, at, Auxiliary, Circuit, Circuit., CM850, Code, Cummins, Detected, Fault, FMI, High, Input, ISB, Normal, OEM, or, PID, Pressure, Sensor, Shorted, signal, Source, SPN, the, to, Voltage

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