TWC Inspection

WARNING: This page is about a different variant/trim than selected.

Visually/physically inspect the three-way catalyst (TWC) converter for the following damage:
- Severe discoloration caused by excessive temperature
- Dents and holes
- Internal rattle caused by a damaged catalyst
Also, ensure that the TWC is a proper original equipment manufacturer part.
Was a problem found?
YES
- Replace TWC and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.