Check Engine Light On problems of the 2010 Ford Escape Hybrid

While driving on interstate at highway speeds lost acceleration going uphill and wrench light came on. Pulled to side of road and stopped. Stopped engine for a few minutes and restarted. Engine started normally and check engine light came on. Acceleration erratic and rpm on acceleration high but not in the redline. Once on level highway could get to highway speeds and leveled out at a constant speed and rpm was near normal. Drove to dealership. Dealership reported no codes but electronic throttle body shorting internally. Replaced electronic throttle body. Dealership stated the electronic throttle body was not covered under warranty. Vehicle had 90, 232 miles at dealership.