Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- The following conditions may cause a catalytic converter to degrade:
- An engine misfire
- High engine oil or high coolant consumption
- Retarded spark timing
- A weak or poor spark
- A lean fuel mixture
- A rich fuel mixture
- A damaged oxygen sensor or wiring harness
- To help determine if the catalytic converter is degraded, operate the engine at 1,500 RPM for 1 minute. Then allow the engine idle to stabilize. The HO2S 2 parameter should not be as active as the HO2S 1 parameter.