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How to fix code p0731ford expedition 2005 - Vehicle Parts & Accessories

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Please note that these are just GUESSES from a shade tree mechanic . I do not claim to be a professional anything . Use my guesses at your own risk ! That being said , here is a place to start looking ...
Since the code refers to automatic transmissions , and gear ratios , I would certainly start by checking your car's transmission level . In most cars , the transmission fluid should be at full temperature . So , sometime , after you have been driving for 10 minutes or so , park somewhere LEVEL . Put the transmission in PARK . Pull the transmission dip stick , wipe it off with a paper towel , shop rag , or something appropriate . Reinsert it to the bottom . Pull it again , and read where the fluid level is .
If it is low , add the fluid SLOWLY . A PINT , or less at a time . Transmissions CAN be over filled . In MANY , if not most cars , the transmission fluid is added via the dip stick tube . ( This seems illogical to me , and you have to wait a while after every add , so the fluid drains fully out of the dip stick tube before you can get a good reading , but , OH WELL !!! )

Posted on Nov 08, 2014


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