VOLVO
CEM-B10B000 - Target Authenification Fault. General Failure Information. No sub type information
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsV40 (2013–), V40 Cross Country (2013–)
Show models by year and engine (2)
What does this fault code mean?
At ignition, the car checks that matching immobiliser codes are stored in the engine control module (ECM) and in the CEM. The fault shows that the ECM could not confirm that the two codes agree, so engine start is blocked.
Possible causes
- The immobiliser code stored in the ECM is wrong
- The immobiliser code stored in the CEM is wrong
What you can do
- 1Read off and note the code and check whether it returns when the ignition is switched on
- 2Check whether any control module has recently been replaced, since a new module may need new software and codes
- 3Try another key for the car, if you have one, and see whether the engine starts
- 4Have a workshop check the immobiliser codes and download software to the correct control module if needed
Symptoms you may notice3
- The engine does not start or does not turn over
- No clicking sound when trying to start
- Text message and warning symbol in the display
What the fault can affect1
- Engine start is not permitted
General guidance for car owners. Diagnosis on the car can point to a different cause.