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    poncho0723's Avatar
    poncho0723 Posts: 4, Reputation: 1
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    #1

    Mar 3, 2010, 08:53 AM
    P1131 code for a ford expedition
    I have a 98 ford expedition and is giving me this code p1131 I all ready replace the idle control valve and still shake a little but now when I'm on the light it shuts off for no reason please help
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Mar 3, 2010, 09:05 AM

    Code P1131: Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.

    I would replace the oxygen sensor.
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