2017 Ford F-150 electrical system problems

“Transmission range and output sensors failed inside the molded leadframe, triggering P0720 and P0722. Ford program 26N04 denied coverage because the codes were not on the approved list. The violent downshifting in my truck has made it undriveable and I am unable to go to work and I am being treated horribly.”

“My 2017 Ford F-150 with SYNC 3 (software version 3.0, build 23219, the latest version Ford offers for this vehicle) has a recurring defect with hands-free phone calls. When a call comes in while my phone ([XXX]) is connected through Android Auto, the call displays as connected but there is no audio in either direction — I cannot hear the caller and the caller cannot hear me. Outgoing calls work normally. Ford's published workaround for this known defect is a setting ("Use Phone Ringtone"), but on my vehicle the setting will not stay selected — it reverts to the default every time the phone disconnects or the vehicle is shut off, so the failure returns on every trip. Ford fixed this defect in its newer SYNC 3.4 software, but has never made 3.4 available for 2017 vehicles, leaving no remedy. The truck is already on the final 3.0 build. This is a safety issue. Washington law prohibits holding a phone while driving, so a failed hands-free call pressures the driver to pick up and handle the phone. The vehicle's [XXX] Assist emergency feature also depends on SYNC maintaining a working phone connection, which this defect defeats. The failure has occurred repeatedly…”

“On 10/13/2026, driving about 25 mph on a city street, my truck entered failsafe with no prior warning lamps or symptoms. The PCM cut most engine power, leaving no acceleration, and set P1285 (CHT Overtemp Sensed) and P1299 (CHT Overtemp Protection Active). The engine was not overheating; a $40 CHT sensor fixed it. Evidence: I watched live data on an Autel MaxiCheck MX808S-TS while driving during the events. CHT dropped to implausibly low values for brief moments, then immediately returned to normal values matching coolant temp. Coolant temp stayed normal throughout. Failsafe triggered on these momentary dropouts, never on an actual high reading. The PCM logic is unsafe: 1. A low-reading sensor dropout was reported as an overtemp. The PCM set two overtemp codes and no sensor circuit code. 2. It ignored contradicting data. CHT recovered instantly and matched normal coolant temp, yet the PCM acted on one momentary bad reading. 3. The response was disproportionate. A sensor glitch with normal coolant temp should set a check engine light and circuit code, not remove engine power while driving. 4. It creates a crash risk. Losing acceleration in city traffic, amid…”

“I am reporting a potential safety defect involving the hood latch sensor or electrical system on my 2017 Ford F-150, currently at 151,895 miles. On three occasions (10/3/26, 10/4/26, and 10/7/26), the "Hood Ajar" warning appeared while driving, accompanied by an audible chime, although the hood appeared securely closed. The message remains displayed until I press OK on the steering wheel. 10/3/26: The warning activated while driving. I safely pulled over, released the hood latch, inspected the hood, and closed it again. The hood had appeared properly secured. 10/4/26: The warning activated while I was descending a steep hill with no shoulder or safe place to stop. Concerned the hood could open and obstruct my windshield, I had to continue driving until reaching the bottom of the hill and finding a turnoff. Upon inspection, the hood was completely closed. 10/7/26: The warning activated again. Because the previous two inspections showed the hood was closed, I dismissed the warning without stopping. This demonstrates how repeated false warnings can cause drivers to disregard a potentially legitimate safety alert. The security alarm also intermittently activates…”

“After a big freeze my fuel level gauge stopped working. I have replaced every sensor and fuse possible, along with multiple new fuel pumps. It has been taken to a certified Ford Dealership and they can’t find the problem. There is a Ford recall that already explains the problem exactly. It is Ford 26C26. I am not able to get my vehicle inspected and without knowing exactly what my fuel level is it could leave me stranded.”

“Vehicle is subject to active Safety Recall 26S28 for transmission lead frame and range sensor failure causing unexpected downshifts into 1st gear. Vehicle experienced downshifting symptoms creating severe road hazard and risk of rear-wheel lockup. Dealership cleared diagnostic trouble codes without saving freeze-frame logs, mis-entered VIN on billing estimates, and refused to complete the recall repair. Vehicle is available for inspection.”