What does fault code CPM-6301 mean?

Diagnostic fault code details for CPM-6301 (Volvo C30 (2007–2013), Volvo C30 Electric (2011–2013), Volvo C70 (2006–2013)). Repair service at OBD Tuning.

VOLVO

CPM-6301 - Control module. Internal fault

System

Combustion Pre-heater Module (CPM)

Volvo models this fault code applies to

Applies to the following models:

5 models

C30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)

Show models by year and engine (5)

What does this fault code mean?

If the CPM detects a fault inside itself, the heater switches off. If it is started again it makes a new attempt, so the fault may show up again. The fault may be temporary or permanent.

Possible causes

Internal fault in the combustion preheater module (CPM)

What you can do

1Clear the code and start the heater again; if the code comes back, the fault is still present
2If you have a diagnostic tool, read the code after switching the ignition off and on and note whether it returns
3Check the connectors at the CPM: they should be secure and free from oxidation
4If the fault returns, have a workshop replace the CPM

Symptoms you may notice2

Poor heating in the passenger compartment
The parking heater does not work

What the fault can affect2

The heater switches off when the fault code is set
If the heater is started again, it makes a new start attempt

General guidance for car owners. Diagnosis on the car can point to a different cause.