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Recent questions tagged p0491

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Is the deaer fixing my car or just clearing the check engine light?
asked Sep 24, 2018 by Edna Shaffer (101 points)
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1 answer 1.4k views
P0491 FORD -
asked Apr 10, 2018 by
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1 answer 601 views
where can I find the fuse and relay for the secondary air system?
asked Feb 15, 2018 by
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P0491 VOLKSWAGEN -
asked Jan 15, 2018 by
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P0491 BMW -
asked Dec 31, 2017 by
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P0491 - what sensors detect the insufficient air flow
asked Oct 22, 2017 by
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P0491 CODE 2014 VW JETTA SPORTSWAGEN
asked Jul 24, 2017 by
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1 answer 801 views
P0491 and P0492, replace secondary air pump?
asked Jul 9, 2017 by
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I have a 2002 BMW 325i with a trouble code P0491. I need help
asked Jun 12, 2017 by
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P0491 & P0492 2002 BMW C 325CI
asked Jun 3, 2017 by
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