Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
- Always begin diagnosis with the first DTC listed on the scan tool.
- Perform a visual inspection for loose or poor connections at all related components.
- If the DTC B3103 is a history DTC, the fault may be intermittent. Refer to Testing for Electrical Intermittents in Wiring Systems.