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    jpearce's Avatar
    jpearce Posts: 13, Reputation: 1
    New Member
    		  
    #1

    Aug 7, 2012, 01:38 PM
    Ford escape maf
    I changed the mass air flow sensor . Car is OK during the day but have to unplug in morning or night . Does the pcu or something need to be reprogrammed ?
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Aug 7, 2012, 02:48 PM
    No, just make sure all old codes are cleared from the PCM.
    jpearce's Avatar
    jpearce Posts: 13, Reputation: 1
    New Member
    		  
    #3

    Aug 7, 2012, 04:11 PM
    Can I clear the pcm without going to the dealer ?
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Aug 7, 2012, 04:43 PM
    Yes, use any code reader or scan tool to clear all codes. Many auto parts stores make them available for free.
    jpearce's Avatar
    jpearce Posts: 13, Reputation: 1
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    #5

    Aug 7, 2012, 07:18 PM
    One more question ; can these codes be actually affecting the way it runs ? My main symptom is it runs good all day but I have to unplug the sensor at night or the car won't turn over .
    Thanks for your time
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