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1999 Mercury Grand Marquis Question: What would be the most expensive cost to repair an engine light diagnosis?

 

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Joy Kennedy Hughes, Vienna, VA, October 17, 2012, 08:05
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Would this require major work, and if so, what would be the approximate cost to make major repairs? The "check engine light" stayed on continuously. Need cost of diagnosis plus cost of any possible major repairs....Thank you.

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