how do I turne the engine light off after I fix the problem

Asked by Jul 03, 2016 at 09:05 PM about the 2008 Mercury Grand Marquis GS

Question type: Maintenance & Repair

1 Answer

66,115

Either with a scan tool or simply drive normally for a few days with the gas tank between 1/4 and 3/4. No more and no less. This will allow the computer to run all the diagnostics and determine the problem has been fixed. The check engine light will then go out. HTH. -Jim

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