VOLVO
CEM-2F03 - Seat position sensor, driver. Faulty signal
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
1 modelXC90 (2003–)
Show models by year and engine (1)
What does this fault code mean?
The CEM registers an invalid reading from the driver's seat sensor. The cause may be an open circuit, contact resistance, or a short between the signal wires. An SRS warning message may appear in the display.
Possible causes
- An open circuit or contact resistance in the signal wire or connectors between the CEM and the seat position sensor
- An open circuit in the seat position sensor
- A short between the two signal wires between the CEM and the sensor
- A short circuit inside the seat position sensor
- A damaged sensor giving a value outside the permitted range
What you can do
- 1Safety: the SRS system controls the airbags. Do not work on the wiring or sensors of the SRS system yourself. Have a workshop fix the fault
- 2Look under the seat for connectors that are visibly loose, corroded or damaged, 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 does not return
Symptoms you may notice2
- The information lamp is lit
- An SRS warning message appears in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.