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Re: Should a cat fail as defective if the substrate is rattling?
Posted to Emissions Forum on 9/28/2007

It does pass either as long as the lights not on for OBDII cars, It would also pass a visual since it would stll be hooked up and look like the correct one for the vehicle. It doesnt say anywhere that is has to work, As dumn as that sounds I think I understan... Login to read more.