Cummins ISB CM850 (2003-06) Fault Code: 294 PID: 441 SPN: 441 FMI: 4 Auxiliary Temperature Sensor Input 1 Circuit – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at OEM auxiliary temperature circuit.

Cummins ISB CM850 (2003-06) Fault Code: 294 PID: 441 SPN: 441 FMI: 4 Auxiliary Temperature Sensor Input 1 Circuit – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at OEM auxiliary temperature circuit.

Possible causes:

1)Signal shorted to ground in the harness.
2)Signal shorted to return or ground in the sensor.

Possible repairs:

1)Replace the OEM temperature sensor.
2)Repair or replace the OEM harness.
3)Replace the ECM.

Categories Cumminz, ISB CM850 (2003-06) Tags 06, 1, 2003, 294, 4, 441, at, Auxiliary, Below, Circuit, Circuit., CM850, Code, Cummins, Detected, Fault, FMI, Input, ISB, Low, Normal, OEM, or, PID, Sensor, Shorted, signal, Source, SPN, Temperature, to, Voltage

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