Question about 2002 Mitsubishi Eclipse

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Service Engine Soon light is on

My service engine soon light goes on and off in my eclipse. The idles high in the cool mornings, but, runs fine after it warms up. The gas mileage seems o.k. The car has close to 150,000 miles on it. Took it to a shop and they said it was my o2 sensor and catalytic converter. I just completed my emissions test and passed. What repairs may be needed, and, is there anything that I can take care of myself?

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Yes.. if you are a mechanic than you replace the o2 senser yourself.

Posted on Mar 07, 2009

  • crysiszone Mar 07, 2009

    The downstream O2 sensor is located on/just after your catalytic converter. There is a special socket used to remove the O2 sensor. You could remove it without the socket, but it won't be easy. If you have an AutoZone in your area, they can loan you an O2 sensor removal/installation tool for free. Just go in and ask for a loaner tool.
    They are not that difficult to replace. Just be SURE your car has cooled down completely. You will get badly burned if you try to remove the O2 sensor right after driving the car.

    I would recommend getting the O2 sensor right from the dealership. This way you're sure it'll fit and that the wiring harness is the correct length. The part number for the downstream O2 sensor for your car is M05269711. It goes for around $140-$175
    Good luck!


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After replacing the o2 sensor and catalytic converter if its showing ok.that means the car ois perfect at poresent.but check out the car at regular maintenace to make it run longer.always get the fuel pump and spark plugs cleaned 

Posted on Mar 07, 2009

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