Crankcase (pcv) problems of the 2018 Ford F-150

The 2018 f150 I purchased started out a good vehicle like most vehicle do. The problems then began to come one after the other. Routine oil changes on the vehicle at the dealership with no hiccups turned into “your motor is low on oil”. The tech tried to find a leak. The motor wasn’t leaking anything, so naturally the tech told me the motor was burning the missing oil. The tech told me “they all burn alittle oil” and topped it back off. I had another “incident” where I was driving on the highway a few weeks later and my engine light came on, and I lost oil pressure. The red “low oil pressure” message came on the dash and I promptly limped my truck to the dealership once again. The tech diagnosed the truck and found a plugged pcv valve. It was changed for a brand new one from the dealer, followed by another oil change well under the recommended interval naturally, due to the motor burning almost all of the oil. The truck still burns oil, and the issue seems to be impossible to remedy. The issue that followed the engine burning oil is the 10r80 transmission installed from the Ford manufacturer. Once again everything seemed fine when I purchased the truck. After driving it for 20-30k miles, the transmission has developed a flare shift between the 3rd-4th gears. The transmission is getting more and more hesitant to upshift and maintain and gain speed. This is considerably noticeable when attempting to get on the highway. This is unacceptable. It puts me in a very vulnerable spot because it doesn’t happen all the time. So I have to be extremely aware and prepared for the truck to become inoperable while merging into the flow of traffic. On two occasions now, while merging onto the highway with traffic, I have had to pull over to the shoulder of the road and put my hazards on to allow traffic to go around me due to my 2018 f150 with the 5. 0/10r80 combination not increasing speed, and reving close to 5k rpms. These issues must be addressed.

With 83,000 miles, we checked the oil to discover it was empty. Upon taking it to the dealer, they determined that there was severe scoring due to the known pcv value issue under TSB 19-2365 for excessive oil consumption. Prior to this time, there had been no oil issues with the vehicle. Dealer recommended replacement of the engine. The engine was replaced in August 2024 with a remanufactured engine. The oil was changed on December 5, 2024. From that point to February 25, 2025, the oil was checked periodically with 3 quarts of oil being added over that period of time. We took the truck back to the dealer to check to see why there is excessive oil consumption again. The dealer instructed us that they would need to follow the recommended action in TSB 19-2365 to reprogram the powertrain control module, install a new engine oil level indicator, and change the engine oil. We would then need to bring the truck in weekly for the dealer to check the oil to assess whether there was excessive consumption of oil. We asked why the engine would have been replaced in August 2024 with another engine that had the same problem as the engine replaced. Weren't the corrections done to the engine per the TSB 19-2365? we were told they did not know.

The contact owns a 2018 Ford F-150. The contact stated that while driving at an undisclosed speed, the oil pressure warning light illuminated. The vehicle then made an abnormal sound. The vehicle was towed to an independent mechanic, who diagnosed that the oil plug had detached, causing all of the engine oil to leak. The mechanic added oil to the engine; however, the check engine warning light illuminated while driving. The vehicle was taken back to the independent mechanic, but the check engine warning light was no longer illuminated. The independent mechanic determined that the crankcase ventilation system had disconnected; however, no repair was performed. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 64,000.