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: Identifying Exhaust Temperature Sensor System Components
Courtesy of CHRYSLER GROUP, LLC
Disconnect and isolate the negative battery cable.
Disconnect the exhaust temperature sensor wire harness connector.