VOLVO
CEM-4F93 - Seat belt reminder. Faulty signal
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 CEM checks the signal from the seat belt reminder sensor in the passenger seat. If the signal from the sensor is faulty, the code is set. A general warning lamp may then light.
Possible causes
- A short between the signal wires
- A damaged seat belt reminder sensor
What you can do
- 1Safety: the seat belt reminder sensor is part of the crash protection. Do not work on it or its wiring yourself. Have a workshop check it
- 2Look at the connectors to the sensor under the passenger seat without removing anything. A workshop should fix any that are loose or damaged
- 3After the work, clear the code and check that the warning lamp goes out
Symptoms you may notice1
- General warning lamp lit
General guidance for car owners. Diagnosis on the car can point to a different cause.