VOLVO
CEM-C111B15 - Left Stop Lamp. General Electrical Failures. Circuit short to battery or open
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 central electronic module (CEM) feeds the left brake light from its own output. The code is set when the signal to the brake light is too high or missing entirely, which can be caused by a break in the wire or a short to battery voltage.
Possible causes
- Open circuit in the wire to the left brake light
- The wire to the left brake light is shorted to battery voltage
What you can do
- 1Read and clear the code and check the left brake light by pressing the brake pedal
- 2Check the fuse for the left brake light
- 3Use a multimeter to see whether the wire to the left brake light has voltage with the ignition off
- 4Use a multimeter to check that the wire is continuous between its ends
- 5If the wire is intact, have a workshop with diagnostic equipment check the module output
Symptoms you may notice3
- The left brake light does not work
- The bulb failure warning in the instruments comes on or behaves abnormally
- Yellow warning symbol and text message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.