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Translating Codes 422 and 412 850 1997

posted by  KlausC on  Wed Dec 3 07:49 CST 2008
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

This site is useful for Pnnnn codes: http://www.actron.com/code_lookup.php

P0422 = O2 sensor for cat below thresh hold
P0412 = SAS valve error, secondary air system

Neither have anything to do with the MAF/AMM sensor. Is this a Volvo shop you went to?

I would first check the hoses going to the SAS valve, any cracks and replace the hoses first.
Then check other vacuum elbows for leaks to clear up the P0422.

Klaus
--
Volvoless. Sold the R. There is now a void...






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