What does fault code CEM-8A07 mean?

Diagnostic fault code details for CEM-8A07 (Volvo S60 (2001–2009), Volvo S80 (1999–2006), Volvo V70 (2000–2008)). Repair service at OBD Tuning.

VOLVO

CEM-8A07 - Dipped headlamp relay. Signal missing. Intermittent fault

System

Central Electronic Module (CEM)

Volvo models this fault code applies to

Applies to the following models:

5 models

S60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)

Show models by year and engine (5)

What does this fault code mean?

The dipped beam relay must not be activated for this code to be set. CEM then registers that the dipped beam circuit is not closed, meaning there is a break. The fault is intermittent and may have occurred earlier without being active now.

Possible causes

Open circuit in the dipped beam relay circuit

What you can do

1Check that the dipped beam relay is correctly fitted and that its contacts are not corroded
2Check the connections to the relay for chafing, loose connections and corrosion
3Use a multimeter to check that the wire to the relay has no break
4Remedy what is found and check that the dipped beam works again

Symptoms you may notice1

Front lamps do not work

General guidance for car owners. Diagnosis on the car can point to a different cause.