Diagnostic Aids
WARNING: This page is about a different car, the 2002 GMC Sierra and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fuel with a high sulfur or lead content can degrade marginal convertor's performance. Be sure to check the fuel quality.
An intermittent may be caused by any of the following conditions:
- A poor connection.
- Rubbed through wire insulation.
- A broken wire inside the insulation.