It's quite rare for the PCM to fail. We can help you determine what the
problem is if you post the DTCs you've retrieved from the PCM.
If you don't let us help you and you decide to go out and spend $xxx.xx on a
new/used/referbished PCM, then take the time to carefully replace it and it
doesn't fix the problem, don't come crying here. ;)
Here is another link of general terminology
There have been a number of different control modules in the past,
at least for some models. I have a Reatta that has 4-5 different types.
The previous link I sent was more or less oriented toward the Taurus,
I think, but is still useful as far as nomenclature of systems
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