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2000 V70R P0422 error V70-XC70 2000

posted by  740pzero on  Sat Oct 17 00:19 CST 2009
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last visit: Wed Sep 9 15:21 CST 2009
[RELATED]

Got a P0422 - Main catalyst below threshold (bank 1)- error Any ideas?








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2000 V70R P0422 error V70-XC70 2000

posted by  KlausC on  Sat Oct 17 04:47 CST 2009
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last visit: Fri Oct 24 10:15 CST 2014
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You get that message when the CAT doesn't clean the exhaust enough, determined by the rear O2 sensor.

Usually caused by unmetered air entering the intake manifold, which causes the engine to run rich at low speed. So, like a bad record, check the vacuum lines and intake manifold gasket for leaks. Once you clear the code, the CEL should stay off for a week or two. It takes multiple occurances of the same code to turn on the CEL.

Klaus
--
Proud owner of a 1967 220S. If I had more room, I would have more Volvos.







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