VOLVO
CEM-8A26 - Gas discharge lamp module (GDL) left-hand. Faulty signal
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (4)
What does this fault code mean?
The left-hand gas discharge lamp module (GDL) tells the central electronic module (CEM) that the left low beam cannot be lit. The cause may be a faulty left-hand lamp housing or a broken signal wire between the module and the housing. Check the lamp housing and the connectors first.
Possible causes
- The left-hand lamp housing is faulty
- Open circuit in the wire running from the left-hand GDL module to the lamp housing
What you can do
- 1Switch the ignition off and unplug the connector to the left headlamp. Check that the connectors are clean, firmly fitted and undamaged
- 2After recent removal or replacement, make sure the igniter sits properly. High voltage is present, so leave other work to a workshop
- 3Use a multimeter to check that the wire between the module and the lamp housing is not broken
- 4Clear the code after the repair and switch on the low beam to see whether it works
- 5If the fault remains, have a workshop replace the lamp housing or igniter, one part at a time, checking after each change
Symptoms you may notice1
- The low beam does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.