VOLVO
CEM-B102496 - Start control unit. Component Failures. Component internal failure
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The ignition lock control unit (SCU) or the antenna unit (IAU) has reported an internal fault to the central electronic module (CEM). The fault code is stored, and the starter motor either cannot be turned over or starts unreliably. The fault is either permanent or temporary.
Possible causes
- Internal fault in the ignition lock control unit (SCU)
- Internal fault in the ignition lock antenna unit (IAU)
What you can do
- 1Check that the fuses are intact
- 2Clear the fault code and road test to see whether it returns
- 3If it returns straight away, or the fault is permanent, have a workshop replace the unit that reports the fault
- 4If the fault only shows up now and then, it is hard to judge yourself. Have a workshop assess it with diagnostic equipment
Symptoms you may notice4
- The starter motor does not turn over
- A message appears in the information display
- The engine does not start, and starting may be unreliable, at times or all the time
- The immobiliser warning light does not show the correct status
General guidance for car owners. Diagnosis on the car can point to a different cause.