Diagnostic Aids

Check for poor connection at PCM. Check for damaged wiring harness. An intermittent problem can be caused by a poor connection, rubbed-through wire insulation or broken wire inside insulation. Ensure HO2S 1 is tight and properly installed.

HO2S 1 requires an outside source of air for proper operation. Air is supplied through HO2S wiring. Check wires and connections for breaks or contamination. DO NOT solder HO2S wiring. Solder will obstruct air path.