Intermittent electrical fault
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
An intermittent electrical fault can be caused by faults in the wiring, components or connectors.
Possible fault causes for intermittent electrical faults are:
- Damaged terminal pins in the connector
- Loose connections in the connectors
- Poor ground connection (oxidation)
- Moisture, poor connections in the connector
- Defects, cracking, damage on the components
- Strong magnetic or other interference that has affected the control modules.