how much will it cost to have the computer of a 1997 Mercury Mountaineer flashed?

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codenamebass

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I have a 1997 5.0L V8 Mercury Mountaineer AWD that has the check engine light on. It failed emissions for two oxygen sensor codes. My mechanic did a full inspection of the entire involved system for ANYTHING that could have caused those codes and said that everything is fine and its a computer problem and the computer needs to be "flashed" or "reflashed" (can't remember which he said)

how much is that going to cost if it is indeed the problem?
he also said it had to be done by the dealer...
 
Just get the codes erased and see if them come back. If so there is a problem. If you disconnect the battery for 10 minutes or so the codes should go away, erasing the check engine light being on. If the light comes back on there is a problem.


If the computer needs reflashed it is usually around $150 to have it done. I am not sure if 1997 Fords can be reflashed or not.
 
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