Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-4501

Condition




The heater is deactivated and the diagnostic trouble code (DTC) is stored if the combustion preheater module (CPM) registers that the maximum time for ventilating the heater has been exceeded.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
- None.

Possible source
- Damaged combustion fan
- Damaged flame sensor.

Fault symptom[s]
- The parking heater does not operate.