Question about 2003 Mitsubishi Lancer

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My service engine soon light is on on my 2004 Mitsubishi Lancer.

I took it to the auto parts store and they pulled two codes. 1 was the #1 spark plug was misfiring and the other was Emissions bank 1. I changed the spark plugs and the O2 sensor and the car was running alot better for about a day. Now the light is back on and is idling funny. Sometimes high and sometimes low.

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  • jplee79 Nov 30, 2008

    erratic idle up and down, wont rev over 4,000rpm

  • Anonymous Mar 25, 2014

    I replaced crank sensor and don't have spark in the first ignition coil but it sparks in second coil



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You can't guess with this vehicle take it to Auto-Zone they will check the code for free and get back to me. Good Luck

Posted on Dec 20, 2008


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Check engine light on, Mitsubishi lancer

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May 03, 2011 | 2004 Mitsubishi Lancer

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Service engine soon light is on

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reset the ECU. Remove the battery lead (black, negative one) for 30 minutes. Refit, clean up the terminal while you are at it with emery paper and fire up the car. Let it idle for 10 mins.

This resets the ECU and the service light will go out.

Please vote for me, 4 thumbs for a free answer from :)

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1 Answer

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you have to see if the coil pack fire up do you have spark coming out of the coil pack cylinder 2 never mind the other code the missing cylinder make the other sensor malfonction check if you have spark coming out of the coil pack if not change the coil pack if you have you spark check the compression let me know pierre please dont rate right away we work together to fix our problem because i whant you to get our car running good and i whant a fixya anything else is bad for me thanks pierre

Feb 25, 2009 | 2002 Mitsubishi Lancer

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