VOLVO
GDM-0008 - Control module. Internal fault
System
Gas Distribution Module (GDM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS40 (1996–2004), V40 (1996–2004)
Show models by year and engine (2)
What does this fault code mean?
The control module contains faulty data in its non-programmable memory (ROM). The fault lies inside the module, so it must be replaced. The headlamps are set to their lowest position.
Possible causes
- Defective control module
What you can do
- 1Have a workshop replace the control module, since the fault is in a memory chip inside it
- 2Have the workshop calibrate the new control module
- 3After the replacement, check that the fault code has gone and that the headlamps adjust normally
Symptoms you may notice1
- The headlamp motor does not respond
What the fault can affect1
- The headlamps are set to their lowest position
General guidance for car owners. Diagnosis on the car can point to a different cause.