I have a 97 ford explorer. The check engine light is on and it wont pass emissions. I've replaced all parts dealing with the tune up. What could be the problem?
What are the codes?
Originally it said i had a misfire and oxygen sensor. i just had all the parts replaced and the light was still on. i have not taken it back yet to see what the codes are saying now.
You have to clear the codes after the repairs are made or they will remain in memory and keep the light on.
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