VOLVO
CEM-8F33 - Right-hand turn signal lamp. Faulty signal
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?
The central electronic module (CEM) has registered a signal that is too high, or no signal at all, on the driver circuit for the right-hand indicator. The right-hand indicator then does not work.
Possible causes
- Short to supply voltage in the control signal wire
- Break in the control signal wire to the right-hand indicator
What you can do
- 1Flash the right-hand indicator with the ignition on: if it does not light the fault is permanent, and if it lights the fault has occurred before
- 2Clear the code and check whether it returns with the ignition on
- 3Use a multimeter to check that the control wire to the right-hand indicator has no break and no contact with voltage
- 4Look for chafing on the wire where it may have touched voltage
- 5Check that the connectors to the right-hand indicator are firmly seated and clean
- 6If the fault returns, have a workshop repair the wire
Symptoms you may notice1
- The right-hand indicator does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.