Engine failure. Right.

 

Sorry - missed this earlier. The issue happened three times before I installed the AutoStop Eliminator. Each time the *** was enabled. Happened once after the installation.

 

This seems like an old thread, but no resolution, and it just happened to me, for a second time.. 2020 F-150 5.0.. First time, I had just turned into a parking lot, and as I straightened out and hit the gas again, it just shut down. I was able to coast into a spot and put it in park. No problem restarting. Mileage on the truck was probably around 2500 give or take.. Then today, with 4900 miles on the truck, I was pulling into my driveway. Same situation, I hit the gas to move forward a little further, and it just shut down. This time, since I was literally parked at home, i just put it in park and came inside to research, so I haven't tried to turn it on again, although I'm confident based on this thread that it will be fine. I have posted my experience on the government website on this page, but just wanted to add my case to this forum too, and bump it to see if anyone has had a confirmed solution? This is the first 2020 I've seen mentioned, so I dont have much hope it's fixed since it's been a problem for a while!!
For another datapoint. the weather is 40 degrees here now. It rained today, so it's damp, but not wet. I noticed a couple other people mention 40'ish degree weather, so maybe it's related? The first time it happened to me, the weather was roughly the same. First time, I had driven about 15 miles from home, so the car was plenty warm. This time, I also would call it warm, but I had only driven maybe 8 miles total. The heat was working well, so I know the coolant was warmed up substantially.

Anything else to try to remember and document while my memory is still fresh?

 

Sorry to hear the issue persists into the 2020 model year. Having it happen in traffic kind of enhances the pucker factor.

Maybe when more naysayers like "isthatahemi" experience this condition and almost wet their pants and complain, the government will crack down on Ford before someone gets seriously hurt or worse.

 

My 2019 5.0 did this one time, but I also had been dealing with some rough idle issues. A day or so later the truck did give me the check engine light so into the dealer it went. They ended up replacing the cam positioning sensor if I recall correctly. Haven't had a repeat of the problem since.

 

My 2018 died randomly 2-3 times right after it was brand new (less than 10,000 miles). I never took it to the dealer or anything and never saw or noticed any codes/lights on the dash. I'm at 60,000 miles now and it's never happened again.

 

Several people have described this as the truck "stalling".. At least in my case, my perception was that the truck was having no problems at all, and the "feature" decided to turn it off. Both times, I was moving, in gear, with the engine running, and as I hit the gas, it just turned it off. No stumbling, and no delay before the message popped up on the dash. It was definitely not a truck with a stumbling engine, trying to keep it running, and then it stalled. It was very intentional and instant.

 

Guess it may be as simple as the *** (auto stop/start) miscommunicating the brain (CPU/ECU). Happens all the time, and not only vehicle related.

 

The 2018 with the 5.0 I had did it twice, after unplugging the small plug in the white box under the dash that disables the A.S.S. it never did it again.

 

I cannot say enough that trying to use 'Simple" blame for a complex system is not the way it can be thought of.
The Auto start system is a complex series of events. A fault in the chain will stop the Auto start function.
Even in very hot ambient temps, re-cranking for any purpose will not result is a high re-charge rate to an AGM battery and especially if it has a lot of age.
Same thing in very cold temps, the AGM is not recharged at a high rate if the battery is also cold.
This is in Ford Documentation and not just a lot of hot air talk. The control for this and other factors is written into the BCM program by intent. It's not a part of the engine computer program but has >input< to the engine program to alter engine control conditions while driving that does NOT include stopping the engine once it is running except for auto stop/start at which point the vehicle is already at a stop by braking control signal and speed sensing.
The battery management system has a sensor at the battery on the negative lead that sends the conditions back to the BCM for control of the system due to the battery temps, state of charge and AGE and includes the need for system re-set after replacing an AGM battery for any reason.
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Stalling could be a Throttle body that needs cleaning on a vehicle that has 30k mile up. Crank case oil/fumes etc is piped back through the PCV to the intake side of the throttle body and can cause accumulation of sludge.
I do not find a way a battery is reasonable cause for stalling because there is still an Alternator the system >>>normally runs off. The vehicle really does not run off the battery. The Battery is there for a high current source for cranking the engine. The same Alternator that supplies power to run the vehicle also charges the battery.
The total vehicle systems are beyond most driver understanding, at this point, and only way is to catch up, use common sense, and learn.
The Owner manual does not tell all.