Ford F-350 SD loss of power problems

Filed Oct 15, 2026 · Fuel system · WI

I request that the federal safety agency investigate potential safety risks associated with the Bosch CP4 high-pressure fuel injection pump in the 6.7L Power Stroke diesel engine used in my 2018 Ford F-350 Super Duty. My truck has approximately 148,000 miles. I purchased it used and am concerned about potential catastrophic pump failure, sudden engine power loss, fuel-system contamination, and substantial repair costs. A CP4 pump failure can release metal debris into the fuel system, potentially damaging injectors, fuel rails, lines, and other components and requiring extensive repairs. Sudden engine power loss while driving or towing could create a serious safety hazard, particularly on highways. I understand that certain vehicles from Ford and other manufacturers have been subject to recalls or safety actions involving CP4 high-pressure fuel pumps. I ask the federal safety agency to determine whether those actions involve the same or substantially similar pump design and failure mechanism as the pump installed in my 2018 F-350. Please review available failure data for 2018 Ford F-350 trucks equipped with the 6.7L Power Stroke diesel, evaluate the risks of fuel-system contamination and sudden power loss, and determine whether existing investigations or recalls should be expanded to include this model year or other affected vehicles. I request that the federal safety agency investigate whether this potential defect presents an unreasonable safety risk and require appropriate corrective action if a safety defect is identified. Owners should not have to wait for a potentially dangerous failure and extensive fuel-system damage before this concern receives adequate investigation. Vehicle: 2018 Ford F-350 Super Duty Lariat Engine: 6.7L Power Stroke diesel Approximate mileage: 148,000 miles Pump status: No confirmed pump failure reported. Thank you for reviewing this safety concern.

Filed Oct 7, 2026 · Transmission · 140,000 miles · IL

The contact owns a 2020 Ford F-350 SD. The contact stated that while driving and depressing the brake pedal, the vehicle lurched forward, and the brake pedal was depressed with more force for the vehicle to respond as intended. The contact stated that while driving at various speeds, the transmission shifted hard and downshifted with reduced power. The Forward Collision Avoidance alarm sounded after the vehicle downshifted. The contact pulled over to the side of the road before continuing to drive. Additionally, the vehicle rolled backwards while in park(P). The vehicle was taken to the dealer, where it was diagnosed and determined that the transmission needed to be replaced. The failure was associated with the federal safety agency Campaign Numbers: 20V365000 (Power Train) and 22V256000 (Power Train); however, the VIN was not included in the recalls. The dealer reported the failure to the manufacturer, and a case was filed. The failure mileage was approximately 140,000.

Filed Aug 28, 2026 · Engine, Fuel system · NV · fire

Wife was driving the truck(I was the passenger) while towing our dump trailer. After approx 100 miles into this trip the dash showed a "Reduced Engine Power Warning", and then shuddered. That was immediately followed by a "Service Engine Soon" warning on the dash, and the truck shut down as we were pulling to the shoulder. I smelled diesel fuel as we slowed to a stop. I got out and saw some smoke coming from under the hood. I looked under the truck and saw burning material falling from underneath, I shouted fire, and my wife exited while I retrieved our dog from the back seat. The cab was filling with smoke. Wife called [XXX] while I retrieved a few more small items from back seat. We stepped back and the truck was fully engulfed in flames in a few minutes. Fire crews were on scene after several more minutes, and by that time the truck was burnt to the ground. This truck was in excellent condition with no prior running issues or warnings of mechanical problems. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 19, 2026 · Fuel system · 30,000 miles · ID

The contact owns a 2021 Ford F-350 SD. The contact received notification of the federal safety agency Campaign Number: 24V957000 (Fuel System, Diesel). The contact stated that while driving 20 MPH, the message "Reduced Power" was displayed, and the check engine warning light was illuminated. The vehicle stalled and failed to restart. The vehicle was towed to a dealer and was diagnosed with failures of the CP4 fuel pump, cycloid filters, and contamination of the entire fuel system. The vehicle was not yet repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 30,000.

Filed Jul 8, 2026 · Electrical · MN

I was driving my truck home when it completely shut off, I lost all power to everything, including the power steering brakes. When I got home, I did some research on the Internet to see possible causes. Apparently there is a service bulletin for the fuse box having water getting into it from the cowl of the hood, which states it can do exactly what happened to my truck? You can also keep your truck running and not shutting off and just to hold host of other safety issues with the service bulletin. . So I brought my truck in to get diagnosed by Ford and they did indeed say it was the fuse box under the hood that got water into it and shorted it out. Ford would not cover this part even though I have a factory extended warranty, annoying this is a common issue for 2020 to 2022 Ford trucks they issued a recall on expeditions in a couple other vehicles, but not Ford trucks specifically the super duties. How is this? OK that they don’t tell a customer who purchased a vehicle that this could potentially happen and then when it happens, they refuse to cover anything even though it’s their fault why it happened.

Filed Jul 1, 2026 · Transmission · AZ

The transmission began malfunctioning by having hard shifting issues and losing power in some gears. An indicator on the dash lit up resembling a mechanics open-end wrench. Research online showed that the vehicle should not be driven and taken immediately to a mechanic or dealership. If driven especially pulling a heavy load like the fifth wheel that I bought the truck to tow the transmission could fail causing a serious safety issue. I immediately took the vehicle to a certified Ford dealership. At the dealership they informed me that parts in the transmission had failed and that it was the same exact condition as shown in recall 20S33. The noted recall was for trucks manufactured in January and February of 2020. My truck was manufactured March of 2020. The time warranty had expired for the vehicle but the mileage warranty was for 60,000 mi and the truck failed at $29,800. The transmission failed due to a manufacturing defect but I was billed over $9,800 for the repair. I have attached photos of the work order and receipt.

Filed Jun 11, 2026 · Fuel system · 195,000 miles · TX

The contact owns a 2021 Ford F-350. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed, but the vehicle failed to accelerate as intended. The vehicle was driven to the shoulder of the road, where it lost motive power. The message "Reduced Engine Power" was displayed, and the check engine warning light was illuminated. The contact stated that the failure occurred while a fifth wheel RV was hitched to the vehicle. The vehicle was towed to the dealer, where it was diagnosed that the high-pressure fuel pump had failed and needed to be replaced. The vehicle was not repaired. The contact was informed that the manufacturer denied covering the repair under the federal safety agency Campaign Number: 24V957000 (Fuel System, Diesel) due to a contaminated fuel system; however, the dealer confirmed that the fuel system was not contaminated. The dealer submitted information to the manufacturer advising that the fuel system was not contaminated. Additionally, a case was filed; however, the contact was denied coverage. The failure mileage was approximately 195,000.

Filed May 8, 2026 · Engine, Fuel system · FL

The component/system that failed or malfunctioned is the SCR (Selective Catalytic Reduction) NOx Catalyst Efficiency system, triggering DTC P20EE – SCR NOx Catalyst Efficiency Below Threshold (Bank 1). This issue began immediately after Ford Recall 24S78 (PCM software update) was performed on April 29, 2026 at Ferman Ford of Countryside. The truck had zero emissions or check-engine issues prior to the recall flash and was perfectly maintained to Ford standards with Howes diesel treatment every tank. The problem has been reproduced and confirmed multiple times by the dealer: After the May 4 PCM reprogram per TSB 21-2248 After replacement of both NOx sensors on May 5 (code returned in under 17 miles) After replacement of the DEF injector (code returned again) The dealer only performed one manual DPF regeneration instead of the two required by Ford SSM 49202 and pinpoint test RD15, and they did not complete the SCR Parameter Reset. They are now quoting an additional ~$2,000 out-of-pocket for a DPF replacement after partial goodwill assistance was approved. The vehicle has been repeatedly inspected and repaired by Ferman Ford. No independent inspection yet. Ford Customer Service has been contacted and partial goodwill was approved, but significant out-of-pocket costs remain. Warning lamps/messages (Service Engine Soon light + “exhaust emission control system is not operating as expected”) first appeared immediately after the April 29 recall PCM flash and have continued ever since. Safety risk: A loss of motive power, entry into limp mode, or reduced power while driving could result in a crash or inability to maintain highway speed. This appears to be a direct consequence of the Recall 24S78 PCM software update tightening emissions monitoring. All repair orders, photos of warnings, and supporting documents are attached for your review. There is 12. I was not able to upload the last of the documents.

Filed May 1, 2026 · Fuel system · TX

Vehicle Safety Complaint – 2021 Ford F-350 I am submitting this complaint regarding a safety-related failure involving my 2021 Ford F-350. While driving under normal conditions, the vehicle suddenly entered “limp mode,” resulting in a significant and immediate loss of power. Approximately 20 miles later, the vehicle completely shut down, leaving me stranded and requiring the truck to be towed to Gene Messer Ford for diagnosis and repair. The failure created a potentially dangerous situation, as the loss of power limited my ability to maintain safe speeds and respond to surrounding traffic conditions. After the vehicle was delivered to the dealership, it took approximately one week for inspection and an additional two weeks to complete repairs. During the repair process, I was informed that newly installed components—including the fuel rail and two fuel injectors—were defective and required replacement again. This raises concerns about whether the root cause of the failure was properly identified and whether contamination or systemic failure within the fuel system was present. I am also aware of widely reported issues involving high-pressure fuel pump (HPFP) failures in Ford diesel engines, which can result in catastrophic damage to the entire fuel system, including injectors, fuel rails, and lines. Given the nature of my vehicle’s failure and the components involved, I am concerned that this incident may be related to a broader, known defect. This type of failure—sudden loss of power followed by complete shutdown—poses a serious safety risk, particularly if it occurs at highway speeds or in high-traffic conditions. I am requesting that this complaint be reviewed as part of a broader investigation into potential fuel system defects in Ford diesel trucks. I believe this issue may warrant further scrutiny and possible recall action to prevent similar incidents.

Filed Apr 10, 2026 · Driver assistance, Electrical · 30,000 miles · MI

The contact owns a 2022 Ford F-350 SD. The contact stated that while attempting to accelerate from a complete stop, the vehicle lost power. There was no warning light illuminated. The vehicle was able to restart. The contact received notification of the federal safety agency Campaign Numbers: 25V455000 (Fuel System, Gasoline), 25V686000 (Back Over Prevention), 26V104000 (Electrical System, Exterior Lighting), and 26V204000 (Visibility); however, the parts to do the recall repairs were not yet available. The vehicle was taken to the dealer but was not diagnosed or repaired. The dealer stated that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 30,000.