VOLVO
CEM-DD07 - Battery Monitoring Sensor (BMS) faulty hardware
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
The battery monitoring sensor (BMS) has a hardware fault. The sensor measures the battery's status and sends the data to the central module, which controls the charging. The fault gives no noticeable symptoms for the driver, but the sensor needs checking and replacing if necessary.
Possible causes
- Damaged battery monitoring sensor
What you can do
- 1Check that the battery monitoring sensor has a steady supply and a clean earth point, and look for loose or corroded connections
- 2Clear the fault code, start the engine and drive for a while to see whether the code returns
- 3If the fault returns, have a workshop replace the battery monitoring sensor
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.