VOLVO
CEM-8B03 - Position lamp relay. Signal missing. Intermittent fault
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:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The position lamp relay should not be switched on when this code is set. The CEM then sees an open loop in the position lamp circuit. The fault is intermittent, so it may not be present right now.
Possible causes
- Open circuit in the position lamp relay circuit
What you can do
- 1Check that the relay is correctly fitted and that its contacts are clean and tight
- 2Check the relay connections for chafing, loose contacts or corrosion, especially if the electrical system has recently been worked on
- 3Use a multimeter to check that the wire from the relay to the lamps is not broken
- 4If the fault returns, have a workshop check the relay and the circuit, since intermittent faults can be hard to find
Symptoms you may notice1
- The parking lamps do not work
General guidance for car owners. Diagnosis on the car can point to a different cause.