CEM-B102408: Start Control Unit. General Failure Information. Bus Signal / Message Failures (2007-2011): Fault-Tracing: Information

Central Electronic Module (CEM) has not contacted the key.

Try with another key belonging to the vehicle.

If it works with another key, you can try adding the key that is not working with the service "Add or delete keys".

If it does not work with another key, the Start Control Unit (SCU) is defective and must be replaced.

Fig 1: Locating Start Control Module (SCU)

Courtesy of VOLVO CARS CORPORATION