VOLVO
CEM-8F1A - Xenon lamp right. Signal too low
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?
The central electronic module (CEM) has registered that the signal from the right xenon lamp is too low. The cause can be a signal wire short-circuited to ground, or an actuator motor in the lamp housing that has jammed or is damaged.
Possible causes
- Signal wire short-circuited to ground
- The motor that moves the xenon lamp has seized
- Faulty or broken motor that moves the xenon lamp
What you can do
- 1Clear the code and check whether it returns with the ignition on
- 2Use a multimeter to check that the signal wire to the right xenon lamp has no contact with ground (the body)
- 3Look for chafed spots on the signal wire where it could have touched the body
- 4Switch between low and high beam with the ignition on to see whether the fault is permanent or has occurred before
- 5If the fault remains after these checks, have a workshop replace the right headlamp housing
Symptoms you may notice4
- The low beam is constantly lit
- The high beam is constantly lit
- Road surface lighting does not work
- Headlamp aim is wrong or the height adjustment does not work
What the fault can affect1
- The shortest beam range is used
General guidance for car owners. Diagnosis on the car can point to a different cause.