Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-3341

Condition




The diagnostic trouble code (DTC) is stored if the control module registers that the signal on the cable from the overheat protection thermostat is too high. 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
- Short-circuit to supply voltage in the cable between the combustion preheater module (CPM) and the overheat protection thermostat
- Open-circuit in the cable between the combustion preheater module (CPM) and the overheat protection thermostat
- Damaged overheat protection thermostat
- Contact resistance, oxidation or loose connections.

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