VOLVO
CEM-U042386 - Invalid Data Received From Instrument Panel Control Module. Bus Signal / Message Failures. Signal invalid
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (4)
What does this fault code mean?
The fault code means that CEM receives a signal from the driver information module (DIM) that it judges to be of lower quality than it accepts. The fault lies in the DIM, and the start inhibitor may stop working. The function is switched off permanently if the fault is detected over 100 operating cycles.
Possible causes
- Internal fault in the driver information module (DIM)
What you can do
- 1Check that the fuses are intact and look up their positions in the handbook
- 2Test the relevant functions with buttons, controls or a road test to see whether the fault shows
- 3With a diagnostic tool, read the fault codes and note whether the fault returns after a restart
- 4Have a workshop trace the instrument cluster with diagnostic equipment. Do not replace the CEM unless testing shows it is damaged
Symptoms you may notice1
- Start inhibitor does not work
What the fault can affect2
- The function is switched off permanently after 100 operating cycles in which the fault was detected
- Erasing the fault codes resets the function
General guidance for car owners. Diagnosis on the car can point to a different cause.