Three problems related to vehicle shudder have been reported for the 2015 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Ford F-150 based on all problems reported for the 2015 F-150.
My wife was driving vehicle and dash started flashing "hill start assist not available", "service advanced trac" and the wrench icon started displaying on console. Vehicle vibrated heavily slowed down in a "cripple" mode no matter how hard gas pedal was pressed. She pulled over, turned the ignition off and waited 5+ minutes before restarting. It re-started with engine light lit. In order to get it to dealer, she had to drive approximately 15 miles. Vehicle drove ok for a bit and then exhibited similar behavior 4 more times, including once going up the conejo grade between camarillo and newbury park where a big rig had to take evasive action to avoid hitting her when the Ford f150 suddenly and uncontrollably slowed down. Had the semi driving not been paying attention, he could have easily hit her. Ford dealer diagnosed as bad throttle body on 11/2/2020 same vehicle had exhibited brake loss due to faulty master cylinder (now a recall) in August of 2019.
After driving like for 30 minutes if I make complete stop and when I press gas paddle my car starts shaking and hard to get pick up. It shakes for couple of time and then goes normal. And while driving also I can feel the same.
At times my 2015 f150 loses all power and go to a low power/ "limp mode" setting. Cautions received are (1) service advance trac, (2) hill descent control fault, (3) hill start assist not avail, (4) traaction control fault light. When this occurs, the vehicle goes to a very low forward power setting (<5mph), runs extremely rough to the point where the vehicle shakes aggressively. This problem is intermittent in nature, and yesterday was the final straw. This suddent oss of power occurred on a busy road and I nearly got rear ended. I immediately limped off the road and was able to get the vehicle towed to the dealership in castle rock, CO. Currently I'm standing by for the mechanics diagnosis. Of note, I do see several similar write-ups of this problem on the NHTSA site regarding the 2015 f150. Ironically, a similar occurrence (ref. Nhstsa id#11083485) happened right up the road from me in castle rock, CO (4/5/18). I hope Ford is aware of this extremely dangerous, recurring problem within its f150 fleet.