Question about 1995 Mercury Grand Marquis

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Check engine lite

I had a vacumm leak on the pvc line, fixed it and now the check engine lite stays on?

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  • dinocroce85 Apr 24, 2009

    I had a egr code. 0401 incificient flow. I found a pin hole in my egr emission tube. i replaced it. the code came back up again the next day after i cleared it. same code. i replaced the egr valve and cleared the code. i drove the car 344 miles then the check engine light came back on again! anyone have any suggestions what to try next b/c i am stumped now




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The ECU which stores the fault codes now needs resetting to tell the system that you have fixed the problem and will then do a quick check to satisfy itself. Usually most garages carry the tool for reset and won't charge you too much if anything at all.


Posted on Jan 06, 2009


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