VOLVO
CEM-AFF8 - Tire pressurement sensor. Signal missing
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
A tyre has stopped sending signals to the central electronic module (CEM) while driving. The module cannot say which wheel it is, so the fault could be on any of the four. It may be caused by a damaged tyre pressure sensor or by the remote receiver having stopped working.
Possible causes
- Damaged tyre pressure sensor
- Remote receiver not working
What you can do
- 1Test the remote receiver by locking and unlocking the car with the remote control
- 2If you have a diagnostic tool, read the frozen values for the fault code and see which sensor ID applies
- 3Have a workshop check the tyre pressure sensor on that wheel and replace it if it is damaged
- 4Clear the fault code and road test to see whether it returns
Symptoms you may notice1
- A message appears in the information display
General guidance for car owners. Diagnosis on the car can point to a different cause.