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I HAVE A 2001 FORD EXPLORER SPORT THE CODE IS P1633 I HAVE CHANGED THE BATTERY AND CHECKED AND CLEANED THE CABLE ENDS WHAT ELSE CAN CAUSE THIS PLEASE HELP

Vehicle: 2001 FORD EXPLORER SPORT 4.0 SOHC

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This code is for the circuit to the keep alive memory to the PCM. You need a volt meter and to ohm the wiring to the PCM, if the wire is bad repair the wire. If the wire is good, then replace the PCM.

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