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2002 Jeep Liberty

Question: Why does the check engine light stay on?

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tommcg, 3.7L V6, Shabbona, IL, February 24, 2011, 13:49
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I've had my 2002 Jeep Liberty since 2003 & I love it, but it does have a problem. The check engine light had been on since 2006. I've taken it shops to get repaired & they say it needs a new gas cap or oxygen sensor. I've changed both numerous times, but it doesn't help. The check engine light will come back on no less than 3 days later. My husband has replaced the coils & spark plugs also. Now the check engine light is flashing & my Jeep is riding very rough. Any idea what is going on? Thanks.

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  • Answer #1

    ZeeTech February 24, 2011, 14:08
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     Master

    Looks like there is a hard misfire at least one or more cylinders. There should be few P03xx trouble codes in the PCM. I suggest take it to a mechanic and let them check it. If you ignore the problem it will cause further problems, like a catalytic converter damage.
    When the shop runs the diagnostic test ask them ALL the trouble codes and post them here.

    Zee

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