Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-0018

Condition




The diagnostic trouble code (DTC) is stored if the control module registers that the signal on the cable from the glow plug is too high. The heater cannot be activated until the diagnostic trouble code (DTC) has been erased.
The diagnostic trouble code (DTC) can only be diagnosed after the glow plug has been activated. The glow plug is activated for approximately 1 minute when starting the heater.

Substitute value
- None.

Possible source
- Short-circuit to supply voltage in the cable between the combustion preheater module (CPM) and the glow plug
- Damaged glow plug.

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