2015 Ford F-350 SD transmission 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 Nov 16, 2024 · Transmission · OR

Put it into drive and it went in reverse at least twice now (I'm assuming that's the transmission control modular...?) Luckily we didn't hit anyone and it's happened at home or a drive thru....no...not yet....it says our truck isn't part of the recall the year had (had no idea there even was a recall for it until it had the issue, and trying to figure it out and someone told us about it the same day the issue occured).....there were no other indicators of prior issues or warnings to it happening....

Filed Nov 21, 2021 · Engine, Fuel system · OR

P20BA - DEF Reductant Heater Code for a defective DEF reductant heater on a 2015 F-350 6.7L diesel with 57,500 miles NOT covered under dealer emissions warranty.

Filed May 10, 2021 · Engine, Transmission · 128,000 miles · AK

Turbocharger intercooler hose blew of while driving causing a loud explosive noise and lost of compression almost causing a crash. I was on a multi-lane highway and it created a safety hazard

Filed Oct 29, 2020 · Electrical, Engine · 51,408 miles · CO

Vehicle was attempting to clean the exhaust filter with the def system. Check engine light came on. Vehicle began slowing down. Scanner revealed code p20ba-00, reductant heater "a" control circuit performance, and p0884 TCM power signal intermittent. Vehicle was being driven at highway speed. Ford dealer contacted regarding repairs. Advised was not under warranty for emissions control. Cost prohibitive to repair.

Filed Apr 6, 2020 · Transmission · 79,000 miles · FL

Tl* the contact owns a 2015 ford f-350. The contact stated while driving 30 MPH, the accelerator pedal was depressed however, the vehicle failed to respond. The contact stated that the vehicle started to decelerate. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to sawgrass ford (14501 w sunrise blvd, sunrise, fl 33323), to be diagnosed. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was 79,000.

Filed Oct 1, 2019 · Engine, Fuel system · 97,000 miles · ID

On my 2115 ford f 350 powerstroke diesel the check engine light came on and it de rated the power. I read the cel code and its pb20a which is a redactant heater performance failure. This problem is covered under warranty for all models 2011-14, f250-f 550 and 2015 f450, f550 only. Ford isn't covering the f250 of f350 in the 2015 years. My truck meets the date and manufacturing plant criteria and it is no drivable because of this emissions control part failure. The redacdant heater keeps the diesel exhaust fluid from freezing and renders the vehicle un drivable when it falis.

Filed Aug 30, 2019 · Transmission · 85,000 miles · UT

Tl* the contact owns a 2015 ford f-350 superduty. While driving various high speeds, the front end of the vehicle shook uncontrollably without warning. The contact slowed the vehicle down until the shaking ceased and resumed normal operation. The contact drove to larry h. Miller ford lincoln draper (11442 lone peak pkwy, draper, ut 84020, 801‑590‑0561) where a few unknown parts were replaced; however, the failure persisted. Since the initial repair, the contact had taken the vehicle to several independent mechanics and was repaired, but the failure continued. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was 85,000.

Filed Mar 15, 2019 · Engine, Fuel system · 55,250 miles · TX

Diesel exhaust fluid reductant heater fault, check engine light has illuminated and is not covered under previous recalls. Recurring problem for ford super duty that needs to be extended for this model as it is the same problem that previous attention was given to. It is a emissions problem that fails on these trucks.

Filed Nov 14, 2018 · Transmission · 56,000 miles · UT

Tl* the contact owns a 2015 ford f-350. While driving 55 MPH and making a left turn, the vehicle shook and the check engine indicator illuminated. The contact diagnosed the vehicle and stated that it needed a reductant heater control. The vehicle was not repaired. The vehicle was not taken to a dealer to be diagnosed or repaired. The manufacturer was notified of the failure and stated that the vehicle did not meet the criteria for the failure. The failure mileage was approximately 56,000.