Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-2308

Condition




The diagnostic trouble code (DTC) is stored if the combustion preheater module (CPM) registers a fault in the internal relay for the control module. The heater cannot be activated until the diagnostic trouble code (DTC) has been erased.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
- None.

Possible source
- Internal fault in the combustion preheater module (CPM)
- Damaged internal relay.

Fault symptom[s]
- Poor heating in the passenger compartment
- The parking heater does not operate.