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Clear the code with a trouble code scanner. I had this code once because the owner installed the air filter wrong and F...I mean messed up the mass air flow sensor. The sensor had to be replaced.

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โˆ™ 2007-03-12 22:57:52
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Q: How do you clear out a p1151 lack of ho2s21 switch-sensor indicates lean check engine code on a 2003 ford f-150?
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