Question about 1997 Subaru Outback

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Check Engine Light

Looking for guidence on the best approach to a Check Engine Light being on. Engine runs rough sometimes but not all the time.

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  • kljtr Nov 29, 2008

    check engine light on emission inspection failed with a po420 code any ideas on what cause. cat or maybe a sensor?

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If you go to Autozone they will pull the codes off for free. Have pen and paper handy and take the info you get to the big blue Mitchell books (at your library?) or take it to the web. I'd go to Mitchell first, though. Haynes and Chilton manuals will have tables of OBDII codes, too, but not with as much diagnostic information. ... but they're quicker to read.

Posted on Aug 20, 2008

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