Diagnostic Procedures
- Check exhaust system for leaks between the front and rear O2S. Check rear O2S for proper tightness. If sensors are not okay, go to next step. If both sensors are okay, ensure that engine misfire condition does not exist. If misfire is not present, replace converter.
- Repair leak(s). Test drive vehicle until test either passes or fail this ignition. If test fails, ensure that engine misfire condition does not exist. If misfire is not present, replace converter.