VOLVO
CEM-2FA3 - Driver seatbelt lock. Signal faulty. Permanent fault
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)
Show models by year and engine (4)
What does this fault code mean?
The CEM registers a driver seat belt buckle reading outside the permitted limits for a set time. The fault is permanent. The usual cause is an unstable signal, an open circuit, or contact resistance in the wiring or connectors. The SRS warning lamp is lit.
Possible causes
- An unstable value or an open circuit in the wiring or connectors to the driver's seat belt buckle
- Contact resistance in the connectors
What you can do
- 1Safety: the seat belt system is part of the crash protection. Do not work on the seat belt buckle wiring yourself; have a workshop check it
- 2Look for loose, corroded or chafed connectors at the buckle, without removing anything. If you find one, have a workshop fix it
- 3With a diagnostic tool, read the fault code after switching the ignition off and on, and see whether it returns
- 4After the work, clear the code and check that the SRS warning lamp goes out
Symptoms you may notice1
- The SRS warning lamp is lit
General guidance for car owners. Diagnosis on the car can point to a different cause.