1997 Expedition "check engine" code

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08-26-2002, 11:28 PM

Boxter

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1997 Expedition "check engine" code

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09-02-2002, 12:13 PM

bootman1

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1997 Expedition "check engine" code

Does anyone have any idea what the P1131 check engine code means? Will this be covered under warranty? The car shakes and idles realyy high or really low at rest. Thanks.

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09-02-2002, 09:06 PM

buzzard

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1997 Expedition "check engine" code

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

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