CEM-5F31

Condition







If the water temperature sensor circuit is short-circuited to voltage supply or if there is an open circuit, the control unit will interpret this as a fault, and diagnostic trouble code CEM-5F31 will be set.

Substitute value

- None.

Possible source

- Contact resistance in control unit connector.
- Open circuit in the signal ground wire.
- The signal wire has an open circuit or is short-circuited to voltage supply.
- Defective water temperature sensor.

Fault symptom[s]

- Poor interior heating.