VOLVO
CEM-B10AD06 - Rain sensor. General Failure Information. Algorithm Based Failures
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?
The CEM communicates with the rain sensor. The fault shows that the rain sensor has not been able to adapt itself automatically to the windscreen, which can be caused by a loose mounting or damaged glass.
Possible causes
- Damaged rain sensor
- The rain sensor is not firmly attached to the glass
- Crack in the glass near the rain sensor
- Stone chip in the glass near the rain sensor
What you can do
- 1Read off and note the code and check whether it returns when you switch the rain sensor on
- 2Check that the rain sensor is firmly attached to the glass
- 3Clean the glass near the rain sensor and look for cracks or stone chips
- 4Check that the rain sensor cushion is intact and in place
- 5If the fault remains, have a workshop check or replace the rain sensor
Symptoms you may notice1
- The automatic windscreen wipers do not work
What the fault can affect1
- If the fault occurs a while after the rain sensor is activated, the wipers go to top speed
General guidance for car owners. Diagnosis on the car can point to a different cause.