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CHECK ENGINE LIGHT V70-XC70 1999

posted by chudar on Tue Sep 22 20:23 CST 2015
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last visit: Fri Jun 13 20:29 CST 2014

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Good evening all, replaced my PCV system about two weeks ago. The day after the install, the check engine light illuminated. Had the code read P0171 bank 1. Can the new PCV system cause o2 sensors to fail?

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CHECK ENGINE LIGHT V70-XC70 1999

posted by KlausC on Wed Sep 23 11:43 CST 2015
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last visit: Fri Oct 24 10:15 CST 2014

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Not only the vacuum lines, check the air intake lines and make sure they are snug. If you have a turbo, grab each intercooler line and try to twist them, if it moves tighten it up.
--
My back feels better when I sit in a Volvo seat

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CHECK ENGINE LIGHT V70-XC70 1999

posted by Herb Goltz on Wed Sep 23 10:51 CST 2015
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last visit: Fri Oct 24 13:23 CST 2014

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Looks like you are running lean-- look for a vacuum leak associated with the PCV repairs, since that is the last place you made changes...

Good luck!

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