Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-U300043

Condition
The combustion preheater module (CPM) checks its internal circuits.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- An internal fault has occurred.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Heater started.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- Heater's function blocked.

Possible source
- Damaged combustion preheater module (CPM).

Fault symptom[s]
- Poor heating in compartment
- Parking heater does not operate