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code P0422 only in a wet weather S70

posted by  Denz0 on  Mon Jan 1 05:35 CST 2007
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last visit: Sat Dec 25 13:13 CST 2010
[RELATED]

First thing first, Happy new year everyone!

About a month ago, I have been treated to a check engine sign and a code P0422. It was raining that day. I got worried and took the car to my mechanic (a generalist). He told me to replace the coverter. Next day the rain stopped an the check engine "went away" along with the fault code.
Recently, it was raining for two days, I got the code, which went away after the rain stopped, just like before.
Anybody has any ideas what might be the cause of this rainy weather problem? Volvo dealers in NYC area are expensive and not very good. They would probably make me replace the whole fuel and exsaust system.
Your help is much appreciated. Thank you.
--
00 S70 GLT SE








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code P0422 only in a wet weather S70

posted by  KlausC on  Mon Jan 1 07:24 CST 2007
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

Probably a short in the wiring to the rear O2 sensor.

Klaus
--
1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi








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code P0422 only in a wet weather S70

posted by  Denz0 on  Tue Jan 2 07:02 CST 2007
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last visit: Sat Dec 25 13:13 CST 2010
[RELATED]

Thank you for your reply. Do you think that changing rear (after catalytic) oxygen censor will solve the problem?
--
00 S70 GLT SE








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code P0422 only in a wet weather S70

posted by  KlausC on  Tue Jan 2 07:49 CST 2007
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

It's possible that changine the O2 sensor will fix the problem, but I hate to throw parts at a car while praying. Just follow the wires for both O2 sensors and look for possible chaffing first.

Klaus
--
1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi







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