My Check engine light flashed 42 times on my 2003 grand marquis

Asked by GuruH5FVC Jul 05, 2019 at 10:00 PM about the 2004 Mercury Grand Marquis GS

Question type: Maintenance & Repair

42 flashes from check engine light

1 Answer
41,620

TDolby answered 5 years ago

When a check engine light flashes, that usually is an indication of a misfire. Scan for the trouble codes. In the meantime, change the spark plugs if you never did.

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