VOLVO
CEM-B1D0011 - Lefthand Low Beam Circuit. General Electrical Failures. Circuit short to ground
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
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?
The central electronic module (CEM) powers the left low beam directly through an output. The code is set when the signal wire to the low beam lamp is shorted to ground, and The fault can therefore show both when you switch the low beam on and in a later drive.
Possible causes
- The signal wire to the low beam lamp is shorted to ground
What you can do
- 1Clear the code and check whether it comes back after a new driving cycle with the low beam on
- 2Check that the fuse for the left low beam is intact
- 3Look for chafing on the signal wire to the left low beam lamp, especially where it may have touched metal
- 4Use a multimeter to check that the signal wire has no contact with ground (the bodywork)
- 5If the wire is intact, have a workshop with diagnostic equipment check the module output and the lamp
Symptoms you may notice3
- The headlight does not work
- Yellow warning symbol and text message in the display
- The bulb failure warning in the instruments comes on or behaves abnormally
What the fault can affect3
- The function switches off during the driving cycle in which the fault is detected
- After repeated driving cycles with the fault, the function is switched off permanently
- Clearing the fault codes and starting a new driving cycle resets the output
General guidance for car owners. Diagnosis on the car can point to a different cause.