2005-2009 Mustang Information on The S197 {Gen1}

Car was sitting thows too lean code

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Old 1/2/09, 07:09 PM
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Car was sitting thows too lean code

Happy New Year All!!! My car has been sitting in the driveway for the last coupe weeks during some weather and threw me a code P0171 "System too lean" one night when I started it up, it was about 22 degrees and snowing outside at the time. I shut it down and it sat for a week or so, I jumped it today since the battery died while the car was buried but the code remains. Anyone have any ideas as to what might cause this?
Old 1/2/09, 07:26 PM
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Originally Posted by Mikes_BLK_GT
Happy New Year All!!! My car has been sitting in the driveway for the last coupe weeks during some weather and threw me a code P0171 "System too lean" one night when I started it up, it was about 22 degrees and snowing outside at the time. I shut it down and it sat for a week or so, I jumped it today since the battery died while the car was buried but the code remains. Anyone have any ideas as to what might cause this?
if the code reads L and R bank it could be a vacuum leak
Old 1/3/09, 11:48 AM
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My threw that code twice - as it turned out it was a bad tank of gas.
Old 1/3/09, 11:52 AM
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humm try so gasline anti freeze or a fuel stabil izer ?
Old 1/5/09, 05:04 PM
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I would first replace the fuel filter...


Bob
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