Diagnostic Aids
WARNING: This page is about a different car, the 1992 Geo Prizm. However, it is still accessible from the selected car via links, so may be relevant.
An intermittent condition may be caused by rubbed-through insulation, or a wire broken inside the insulation. Check ECM harness connectors for backed-out or damaged terminals. If code is intermittent, refer to TESTS W/O CODES article in this section.