VOLVO
CEM-DD11 - Communication with the combustion preheater module (CPM). Signal missing
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The central module receives no communication from the combustion preheater module (CPM), so the parking heater does not work. The cause may be a damaged fuse, a short circuit or break in the signal wire, or a fault in another control module on the network.
Possible causes
- Short circuit between the signal wires
- Open circuit in one of the signal wires
- Damaged fuse
- Fault in another control module on the network
What you can do
- 1Check that the fuse for the parking heater is intact, using the owner's manual
- 2Follow the signal wire to the parking heater for breaks. With a multimeter, check that it has no contact with ground
- 3If the wire is intact, have a workshop replace the combustion preheater module (CPM)
Symptoms you may notice1
- The parking heater does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.