American Cars
Mercury Grand Marquis
Check Engine Light
Late Model 1979-New Ford Mustangs

Why does check engine light in a Grand Marquis repeatedly turn on and off every few minutes or so?

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Wiki User
September 13, 2008 1:37AM

There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.