VOLVO
CEM-U300004 - Control Module. General Failure Information. System Internal Failures
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The central electronic module (CEM) has found an internal fault in its own processes. The fault is caused by a software error in the module and is stored while the module has power. It can show up as a gauge reading incorrectly or not working as it should.
Possible causes
- Software fault in the control module
What you can do
- 1Read and clear the code, then road test the car to see whether it comes back
- 2Has the car recently had new software or an update that was interrupted? Tell the workshop
- 3If several gauges show faults at the same time, have a workshop read the module software and download the latest software to the central electronic module (CEM)
Symptoms you may notice1
- One of the gauges shows wrong readings or does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.