Diagnostic Aids
WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. 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 B1003 is a history DTC, the fault may be intermittent. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .