VOLVO
CEM-8A0C - Relay, day running lamp. Signal missing
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
CEM registers a break in the status flag when nothing turns on the daytime running lamp relay control, and then the fault code is set. The cause may be a break in the relay control or a relay that is not fitted. It shows as the low beam being lit all the time.
Possible causes
- Break in the relay control for the daytime running lamp relay
- Daytime running lamp relay not fitted
What you can do
- 1Check that the daytime running lamp relay is seated in its position
- 2Check that the wire to the relay control has no break, and remedy what is found
- 3Clear the fault code and check whether the low beam works normally
- 4If no fault is found, try a new relay
Symptoms you may notice1
- The low beam is lit all the time
General guidance for car owners. Diagnosis on the car can point to a different cause.