VOLVO
CEM-B10A619 - Quiescent Current At Low Battery Voltage. General Electrical Failures. Circuit current above threshold
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
Information about the vehicle's power supply is stored in the central electronic module (CEM) and in the battery monitoring sensor (BMS). The fault shows that the car's standby current is too high when the battery is already at low voltage, which can drain the battery further. The check runs once an hour.
Possible causes
- A control module does not go into standby
- A control module has an internal short circuit
- Leakage current in wiring or connectors somewhere in the car
What you can do
- 1Charge the battery and check that it holds its voltage while the car is parked
- 2Clear the code and check whether it returns after the car has been left locked overnight
- 3Check that the battery terminal clamps are tight and clean
- 4Remove extra equipment fitted afterwards, such as an alarm or charger, and see whether the fault clears
- 5If the fault returns, have a workshop measure the standby current and find which control module or circuit draws too much
Symptoms you may notice4
- The engine does not start
- No clicking sound when trying to start
- The battery is dead or has low voltage
- The central locking does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.