DTC: PO442

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Dec 6, 2006 | 02:02 PM

johnhon

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Joined: Feb 2005

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From: Amherst, MA

DTC: PO442

I pulled this code from my 98 XC. My Chilton manual says it's a Three-way catalic converter (TWC) efficiency. What should I check?
Thanks.

Dec 6, 2006 | 09:17 PM

tech

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Posts: 36,349

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From: Orlando, Florida

RE: DTC: PO442

Air leak,Exhaust leak,Mass Flow sensor,Cat.

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