Same problem w/ the def heating unit as on earlier/similar f-series trucks that have compelled ford to issue extended warranty (see customer satisfaction program 18m01) -- a dtc208a error comes up, indicating failure in the def sender/heater. not clear why ford is omitting the 2015 f350 powerstrokes when they're using the same part and built in the same factory as the models that have had the warranty extended.
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.
I was driving out of state (ny) when an alert stated "low fuel pressure) and the vehicle slowed to 5-10 mph while traveling on the interstate. upon exiting, the vehicle stopped running leaving me and my family stranded. i had it towed to a local shop which informed me the bosch high pressure fuel pump was not delivering the required pressure (/,000 psi). upon contacting the ford dealership where the vehicle was purchased, i was informed the vehicle exceeded warranty miles (100,000/129,239) and the cost of the pump was $1,245 with exchange prior to labor charges. in all, ford dealer wants nearly $5,000 to repair the pump which was poorly designed.
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.
Exhaust filter cleaning when that warning comes on my trucks engine is really rough and shakes. this is when driving to clear the exhaust filter.
Def tank filled at 7300 miles. at 9600 miles a "exhaust fluid low" 50 miles til engine idle. picked up exhaust fluid and refilled-only 2 gals added to overflowing. did not reset, went to stanley ford kenai, ak. countdown went on, then"engine idle at next restart" dealer says to bad nox sensors, replaced and codes cleared. 15 miles later, exhaust system failure" engine will idle soon" fortunately i made it home in the dark and 40 miles in the rain. now it has gone into the "engine idle" mode and "check your manual" dealer called, tow truck called, soon to be going back to dealer.
During regeneration of the diesel particulate filter the truck loses power and operates roughly. this last occurred as i was merging into traffic on the highway during slick road conditions. this could have very easily resulted in loss of traction and/or collision as i was unable to accelerate to speed.
Would not regenerate when required. went into filter full service now mode. then check engine light came on.
Exhaust fluid message on dash that speed will be limited to in 50 miles. went and bought a new jug of blue def. it took 2 gallons to fill to running over. then before i got to the kenai, ak dealer, it says engine will idle upon restart. the kenai, ak dealer said up and down stream nox sensors had failed and reset the codes. 15 miles later, i get and "exhaust system failure" engine will idle soon. made it home(40 miles at 10pm and raining) then it says engine idled, check operator manual. basically it thinks my def tank is empty, but it has only 75 miles on a completely full tank.