VOLVO
CEM-1D0B - Control module. Internal fault
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
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 CEM has registered an internal fault in itself. The clock in the information module and the parking heater may stop working. The fault may be permanent or temporary.
Possible causes
- An internal fault in the control module
What you can do
- 1Switch the ignition off, wait a moment and switch it on again. Check whether the clock and the parking heater work
- 2Check the CEM fuse. If it has blown, replace it once. If it blows again, use a multimeter to check the wire after it has no contact with ground
- 3If the fault returns, read the fault codes with a diagnostic tool if you have one. If the fault persists, the CEM probably needs replacing
- 4After the work, clear the code and check that it does not return
Symptoms you may notice2
- The clock in the information module does not work
- The parking heater does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.