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#1
05-21-2011, 11:24 AM
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97 f150 check engine light below quarter tank
i searched all over the board and couldn't find a thread about this problem. it's happened three times now and it's got me confused. when i get between a quarter and an eighth of a tank of gas (before the low fuel light comes on), the check engine light comes on and stays on. i will go off after i fuel up and drive it for a couple of days. when it happens, there is no change in performance or drivability. the last time it happened i had the codes downloaded and the only one i can remember is the 0401 code. it is the 4.2 liter, automatic, regular cab, two wheel drive. plugs, wires, and oil changed within the last 1500 miles. ideas?
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#2
05-21-2011, 09:27 PM
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Re: 97 f150 check engine light below quarter tank
Focus on the DTC P0401 ''Insufficent flow EGR''
It sounds like the EGR valve + passages need cleaning, See similar threads.
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