Cummins ISM CM875 (2003-06) Fault Code: 213 PID: P175 SPN: 175 FMI: 4/4 Engine Oil Temperature Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the engine oil temperature circuit.
Possible causes:
1)Signal shorted to ground in the engine harness 2)Signal shorted to return or ground in the sensor.
Possible repairs:
1)Replace the engine coolant temperature sensor. 2)Replace the ECM. 3)Repair or replace the engine harness.