VOLVO
CEM-C1A5686 - Tire pressure sensor. Bus Signal / Message Failures. Signal invalid
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The central electronic module (CEM) receives the signals from the tyre pressure sensors through the remote receiver. Because the position of the sensors cannot be determined on the car, the fault may apply to any wheel. The code is set when the signal from one sensor is too weak or cannot be interpreted, and
Possible causes
- Internal fault in the tyre pressure sensor
- Internal fault in the remote keyless entry receiver (RKE)
- Low battery in the tyre pressure sensor
What you can do
- 1Read and clear the code and drive the car a longer distance to see whether it comes back
- 2Test the remote control by locking and unlocking the car; if that does not work, the fault may be in the receiver
- 3Check that the pressure in all four tyres is correct
- 4Have a workshop identify which sensor is faulty and replace it if needed
Symptoms you may notice1
- Message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.