Cummins ISB CM850 (2003-06) Fault Code: 293 PID: 441 SPN: 441 FMI: 3 Auxiliary Temperature Sensor Input 1 – Voltage Above Normal, or Shorted to High Source. High signal voltage or open circuit detected at the OEM auxiliary temperature circuit.
Cummins ISB CM850 (2003-06) Fault Code: 293 PID: 441 SPN: 441 FMI: 3 Auxiliary Temperature Sensor Input 1 – Voltage Above Normal, or Shorted to High Source. High signal voltage or open circuit detected at the OEM auxiliary temperature circuit.
Possible causes:
1)Open return circuit in the harness, connectors, or sensor
2)Open signal circuit or shorted to a voltage source.
Possible repairs:
1)Replace the OEM temperature sensor.
2)Repair or replace the OEM harness.
3)Replace the ECM.
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