2010 F150 PLT: While driving my F150 2wd on the highway the engine light will turn on periodically when I accelerate to pass a vehicle. It usually happens when I am doing 40mph and trying to pass a vehicle or catchup to the traffic speed. It seems as if though the transmission is not catching or something to that effect. I only have 110K miles on the truck and have had the transmission fluid changes at 100K. Need help to figure out this problem. I had autozone connect up the trouble code reader but because the engine light does not stay on I don't have any faults.