VOLVO
CEM-6F87 - Fuel tank filler cap. Activated too long
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?
CEM controls the power supply to the fuel filler cap lock motor through a directly connected wire. If the switch for opening the fuel filler cap has been active for two minutes, the fault code is set, and then the cap cannot be opened with the switch at the light switch. The cause may be a switch that has stuck or is faulty.
Possible causes
- Fuel filler cap opening switch stuck in the activated position (defective switch)
- Fuel filler cap opening switch activated for more than two minutes
What you can do
- 1Switch on the ignition, press the fuel filler opening switch on the light switch unit and check that the cap opens
- 2If you have a diagnostic tool, read the switch status in live data; it should show activated when pressed and not activated when released
- 3Check that the button has not stuck and that the wires are intact, and remedy any fault found
- 4If the switch does not work, a workshop should replace the light switch module
Symptoms you may notice1
- Fuel filler cap cannot be opened with the switch at the light switch
General guidance for car owners. Diagnosis on the car can point to a different cause.