2015 Ford F-350 SD engine problems

Filed Sep 15, 2026 · Electrical, Engine · MO

On June 9, 2026, the vehicle received a PCM reprogramming under Ford Recall 21E01. Before the update, the transmission had no symptoms: no slipping, no warning lights, and no diagnostic trouble codes. Between June 9 and August 11, the vehicle accumulated 1,894 miles. On August 11, 2026, while driving about 60 mph, the vehicle suddenly downshifted from sixth to fifth gear without input. A clunk was felt, followed by complete loss of all gears. There were no warning lights, no diagnostic trouble codes, and no limp‑mode activation. The failure was sudden and total. A diesel shop retrieved the strategy values after the incident, which showed no recorded indication of transmission degradation prior to the PCM update. The failure occurred less than 2,000 miles after the PCM reprogramming. The vehicle was in factory‑stock condition. The incident raises concern that the updated PCM calibration may have affected torque calculation, shift coordination, or diagnostic monitoring, resulting in an uncommanded downshift and loss of all gears without protective response.

Filed Jul 25, 2025 · Engine · CA

2015 Ford F350 6.7 liter Diesel Turbocharger with only 58,000 miles malfunctioned while accelerating on to freeway without any prior warning indicators or symptoms. Immediately engine acceleration was reduced drastically causing freeway cars to nearly rear end my vehicle and other cars swerving to avoid accident. A message showed up simultaneously while reduced acceleration occured on vehicle’s dash display indicating something to the effect “Reducing Acceleration” and a yellow check engine icon lit up on dash display. I limped the vehicle to the side of Freeway and shut engine off. Upon restarting engine discovered engine and turbo operated properly and was able to drive vehicle to a non-Ford Service Center to be repaired. The Technician could not find anything wrong with the operation of the engine-turbocharger and cleared the trouble code. Drove vehical for approximately 500 miles and the same reduced acceleration problem re-occurred while accelerating on to freeway. Pulled vehicle over to safe area, shut engine off, re-started engine, engine and turbocharger operated properly, drove home and then to Ford Dealership (check engine icon still lit). Discovered vehicle can not be smog tested with this intermittent problem due to check engine icon. My safety, my passengers safety, and others safety while driving on the freeway were put at high risk. The reduced acceleration problem does reoccur. Ford diagnosed the vehicle problem to be a bad turbo with an estimate of $5,100 dollars for removal and replace with new Ford Turbocharger which only has a two year warranty. The repair work is currently in process. I consider this turbocharger to be pre-mature failure and a safety risk! This turbocharger intermittent failure in my opinion should be a mandatory recall and paid 100% by Ford.

Filed Mar 7, 2025 · Engine · 93,000 miles · CT

The contact owns a 2015 Ford F-350. The contact stated that upon inspecting the oil level, the dipstick had fractured in half. In addition, the contact stated that the dipstick was rusted. The vehicle was not repaired. The local dealer was not contacted. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The approximate failure mileage was 93,000.

Filed Jan 30, 2025 · Engine · 120,000 miles · NJ

The contact owns a 2015 Ford F-350. The contact stated that while driving 55 MPH, the vehicle drove over a bump in the roadway and started losing motive power. There was no warning light illuminated. Despite the failure, the contact was able to drive at a reduced speed back to the residence. Upon inspection, the contact discovered that the intercooler hose had cracked, causing the vehicle to lose motive power. The contact replaced the intercooler hoses and the MAP sensor. Upon investigation, the contact stated that the failure was a known issue. Neither the dealer nor the manufacturer was notified of the failure. The vehicle was repaired however, the contact stated that the turbocharger failed to operate as needed. The failure mileage was approximately 120,000.

Filed Jan 9, 2025 · Engine · 120,000 miles · ID

The contact owns a 2015 Ford F-350. The contact stated after a visual inspection of the engine compartment, he observed that the engine block heater core wire assembly was melted. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to Safety Recall 18S45. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was 120,000.

Filed Dec 3, 2024 · Engine · AZ · fire

While driving truck caught fire left side of engine and in a few hundred yards of getting stopped burning fuel was pouring from left side in the area of secondary fuel filter.

Filed Jul 24, 2024 · Engine · CA

Had engine light on In 2019 .Nox sensor replaced under my 4year extended warranty. Truck had 103,000 miles 2021 had engine light on, Nox sensor fault, Calibration of Nox sensor preformed. Truck mileage 110,000 2024 engine light on. Nox sensor fault, Nox sensor replaced, My cost $1058.64 Truck mileage 113,945 So in four years and only 10,000 miles , I have had to install two of the same location , Nox sensors and one calibration. So in my vue, ford has an issue , with these parts and warranty. I would appreciate , if you would get back to me on the issue Sunrise Ford of north Hollywood seems to be on my side Technically the part in question has an issue,as do many other truck owners with same part.

Filed Jan 26, 2024 · Engine · 49,000 miles · CA

The contact owns a 2015 Ford F-350. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated on the instrument panel. The vehicle was taken to an independent mechanic, who determined that the diesel particulate filter was cracked and required a replacement. The vehicle was not repaired. After investigating the failure, the contact related the failure to Customer Satisfaction Program: 20M06, but the VIN was not included. The manufacturer was notified of the failure but referred the contact to the federal safety agency Hotline for assistance. The failure mileage was 49,000.

Filed Oct 19, 2023 · Engine · CA

We purchased the vehicle brand new (33 miles). At 65,142 miles (07/09/18) the engine quit running and we pulled to the side of Interstate 15 barely off the freeway. It had to be towed to the dealership. At 69,345 miles (12/26/18) the engine blew up while we were traveling at 65 MPH on Interstate 10 towing a 5th wheel trailer. Just made it to the beginning of the off ramp in Indio. Towed to the dealership where a short block engine was put in under warranty. At 80,029 miles (08/14/19) the engine locked up, would not turn over. Dealership put in a long block engine also still under warranty. At 115,000 miles (09/06/23) the engine quit running and we had it towed to the dealership where they stated we needed a new engine (#4). Unfortunately, the engine is not available and is no longer under warranty. It has scared us each time there is an engine failure and do not trust the vehicle to keep us out of harms way. I have all of the service order receipts. Thank you for your time.

Filed Sep 1, 2023 · Engine · 29,593 miles · MN

The contact owns a 2015 Ford F-350. The contact stated that while driving at 55 MPH, the vehicle message of “50 Miles until Derate Speed Limitation” was displayed. The check engine warning light was illuminated. The vehicle was diagnosed by a dealer as a failure with the DEF system and a failed NOX module. The manufacturer was made aware of the failure and confirmed that the vehicle was not under warranty. The failure mileage was approximately 29,593.