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Code PO1131

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Old Apr 27, 2012 | 02:16 PM
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Default Code PO1131

I have a code PO1131, anyone know what it means? The Truck is a
96 f150 with a 5.0 auto trans.
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Old Apr 27, 2012 | 02:24 PM
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lean condition on bank 1
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Old Apr 27, 2012 | 02:31 PM
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Engine is trying to correct rich for overly lean system, in this case on bank 1 side or cylinders 1,3,5,7 because the sensor is reading lean. This maybe caused by a faulty HO2 sensor or you may have contaminated injectors, air or exhaust leaks. If you only have that code something on that side is going wrong.

Last edited by sylver91; Apr 27, 2012 at 02:34 PM.
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