I suspect the catalytic converter on my vehicle is going bad, what are the normal symptoms?
Catalytic converters, like many parts, fail in a number of ways. The symptoms generally depend on the nature of the failure. For instance, a cracked ceramic housing may result in a rattle when running. A failed catalyst will normally set a check engine light on a post 1996 vehicle. Catalytic converters sometime also plug up or restrict the exhaust.
