2021 Ford F-150 electrical system problems

“My 2021 F-150 PowerBoost hybrid repeatedly lost propulsion while traveling on the highway in early October 2026, including four incidents on one trip around October 3. At approximately highway speed, the tachometer dropped to zero while the selector remained in D, and the truck coasted as if in neutral. There were harsh shifts around 9th/10th gear and difficulty accelerating beyond approximately 70 mph. A vehicle warning appeared. Disconnecting and reconnecting the battery temporarily restored operation. Sudden loss of drive power in highway traffic created a collision risk. The underlying cause has not been independently established. A Ford dealer's October 2026 inspection recorded an internal transmission hydraulic leak, clutch-disconnect trouble codes suggesting a hybrid drive unit concern, a recommendation to replace the transmission with the hybrid drive unit, and high-voltage battery cell-balance DTCs. More recently electric-driving mileage has remained at zero and the gasoline engine continues running while stationary. Severe shifting and vibration had varied between 2H and 4A modes. Around June 2025 the vehicle also stopped operating and was towed to…”

“While driving truck, it had an electrical fritz that caused the car to become undrivable, with systems not responding. when stopped to power cycle, the car would accessory on but not attempt to start. the horn would go off randomly. was able to manually put the truck into neutral and push into a safe spot, at what point a battery clear was attempted with no results, and required towing to dealership where water had intruded into the BCM”

“This vehicle was purchased new. It currently has about 56000 miles. Over time there have been numerous incidents where the battery was suddenly dead. The dealer repeatedly replaced the battery with out addressing the cause. This was done under warranty until recently when there was a charge of $1138. This supposedly resulted in the electronics being reset to factory settings. On a subsequent trip of about 2000 miles , there were numerous incidents (at least 8-10) where the Google Maps program, installed by the dealership, malfunctioned. My question is, what other electronic issues were installed with the factory settings. This has been reported to the dealer, with no response. On August 31, 2026, a request was made to the dealer for copies of service records for this vehicle so that this problem and lack of correction could be challenged. There has been no response, other than their saying “they will make it right “. They are apparently unable to provide service records.”

“Due to a dangerous design flaw in the 2021 Ford F150, I was put in a potentially dangerous situation by completely losing all power in the vehicle on a backroad. Design flaw is the DCN module, which floods into the vehicles electrical system/body of vehicle through the cowel drain that can supposedly be blocked by a singular piece of pine straw. Due to the design flaw, the vehicle completely lost all power and all electronics failed while driving down the road at 45 mph, putting both me and my father (riding passenger seat) in immediate danger. Ford knows and is aware of the design flaw and has refused to issue a recall, not only affecting my safety, but now I am going back and forth with ford over the fix to the tune of $2800 that they refuse to fix (vehicle is a gold certified cpo, has extended warranty). When asked how to prevent in the future, ford was and is not aware of how to prevent in the future, and I can not get to the cowel drain clog without professional equipment and ford performing. There is no way to tell the cowel drain is clogged or not, and there is not anything in the ford owners manual related to maintenance of the cowel drain. Again, due…”

“When backing up, the rear camera display shows a gray filter over the rear image on the display cluster and the right side warning sensors indicate a blue trapezoid on the cluster for the right side of the vehicle. The driver dashboard also has an alert that the rear brake assist feature is inactive”

“The safety daytime running lights are failing prematurely. My car has 32,000 miles and my DRL is burnt out on the passenger side. Online forums confirm that this is happening to many, many people. It’s a safety hazard for other drivers because the cost to repair is substantial and people aren’t fixing them. Ford should fix this as a recall.”