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Hi....I would like to assist you with your question. Unfortunately the mil light can come on for a countless number of reasons. You would have to have it scanned to see what code is stored in the system . Then I would most likely be able to give you a pretty good idea of whats wrong. You could also try calling the dealer to see what code was present when they erased it. Thanks,David Contact me if you have any further questions regarding this.
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