can you put a pcm out of an identical grand cherokee and have it work in another?

Asked by May 18, 2018 at 09:02 PM about the 1998 Jeep Grand Cherokee

Question type: Maintenance & Repair

powertrain control module swap in identical vehicles

6 Answers


You should not need to ever replace a PCM unless you put it under water. Diagnose your vehicle or have someone that knows cars do it.


I think you would need a reflash.

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The numbers have to match that are on the part itself.

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Best Answer Mark helpful

thanks for the help,i did have the pcm diagnosed as the probable problem. I dont see why one mechanic would find it hard to believe that a 20 year old computer would malfunction. In my experience, anything can break.


They do fail, but usually there is something that caused it, over or under voltage is a biggie, then there are those that just plain fail, who knows the reason. Thanks for the points.


If you put the battery terminals on wrong it will fry the pcm

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