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Beware of posers

Unfortunately the 'misfire' code can be one of the more difficult to get to the bottom of. Check out for info on O2 sensor codes. Did you get a MAP sensor code too? That usually indicates a vacuum leak when accompanied with misfire codes. DTC codes are not a diagnosis they only give you a place to start looking. If you have a mechanic you trust, you may be better off having a shop take care of it. Beware of parts swappers posing as mechanics.
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