Question about 1999 Mercury Mountaineer

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Code p0401-exhaust gas recirculation flow insufficient detcted

The 1999 mercury mountaineer failed safety. what is the proble?

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  • Anonymous Mar 21, 2014

    light comes on

  • Anonymous Mar 22, 2014

    I just got new spark plugs, egr valve, mass air flow sensor, and when getting the machine plugged in, CODES p100 cylinder 1 misfire and p0401 exhaust gas recirculation flow insufficient . What could this be?



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These vehicles as well as every other Ford vehicle has had problems with the DPFE sensors going bad. Ford had a program for this problem but was limited to time and mileage. You can contact a dealer to see if it still qualifies if not the sensor will need replacement. this is very easy to replace

Posted on Nov 24, 2008


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