WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Powertrain Control Module (PCM)
Courtesy of CHRYSLER GROUP, LLC
The Powertrain Control Module (PCM) (2) is located in the left side of engine compartment attached to the left inner fender. The PCM also incorporates the barometric pressure sensor in it's housing.