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It is in the air intake box at the front of the car.....one of the easiest PCM's to get to, but no GM dealer seems to want to tell you that.
The PCM (or ECM) is located on the interior of the car on the passenger side. To access the PCM/ECM remove the kick panel just beneath the glove box and it is right there. Disconnect the three electrical harnesses and and sucuritity clip and it's out.
On the dashboard
The pcm of a 2001 Taurus should be located under the hood. The unit is bolted onto the firewall on the passenger side.
In the truck
The pcm is located on the drivers side of car, by the radiator.
Powertrain Control Module (PCM)
Yes the ecm( engine control module)/ pcm( powertrain control module) are the same thing. Different manufacturers use different acronyms, ECU (engine control unit) is another often used.
In the air filter box
Pass side firewallbehind kick panel
Under the air filter housing
Under the dashboard , behind the glove box, passenger side.