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There are 2 ways to do this. #1- go to autozone, and ask them to do it for you. THey will take an obdII reader out there an erase the codes.

#2-disconnect your negative (most likely black) power cable from the battery, and give it a half hour for all of the memory in your car to erase. Read you owners manual on battery failure...it will tell you how to reset your idle conditionas and perameters.

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Q: How do you reset a 2003 Saturn ion check engine light?
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