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Oxygen Sensor Question; C/S/V70 S70

posted by  oak_park on  Wed Jan 27 05:55 CST 2010
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last visit: Mon Oct 17 15:04 CST 2011
[RELATED]

Was the code p0442 or p0422? Two different systems.People often get those codes confused.

p0442 is an EVAP leak code. Often J hose crack at charcol canister.
p0422 is a cat converter code. Could be a bad cat, bad 02 sensor or an exhaust leak. When I had a p0422, it was a rusted hole in the connection where the converter meets the rest of the exhaust pipe and it uses that funny clamp that rusted through.

I do agree OEM 02 sensors are best. Just do a full exam first to make sure thats your problem because they are expensive. Is the car running rich? Any smell of sulphur from exhaust?






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