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Check Engine Light
Ford Ranger XL
Ford Ranger XLT

Why would a 1991 Ford Ranger Check Engine light come on only after the car has been running on the road for about 3 to 5 minutes?

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2004-11-29 06:27:32
2004-11-29 06:27:32

It goes into closed loop mode, and one of the sensors is not inputting the info the PCM needs.

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