Complete shut down while driving

[sajohnson]

Recently the same thing happened to me. Search my user name for more details.

First time they replaced the battery, 2nd time was a bad/loose ground wire. I'm sure the 2 incidents are connected to one another.

Good luck with a diagnosis/fix.

There have been enough posts about loose ground wires that it's certainly worth checking them first, before troubleshooting.

Without physically checking, a loose ground may not be found during routine testing. It may only cause problems after the car has been subjected to vibration.

In fact, even owners of a trouble free BS might want to confirm that all ground connections are tight.

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[RSH]

If you search the board, others have had random shutdown issues including myself. I also had some other electrical anomalies. In my case all were solved when the dealer replaced the battery under warranty.

 

[BravoAlpha]

is auto start/stop playing a factor here?

 

[Escape2Bronco]

is auto start/stop playing a factor here?

Not per the OP or based on the numerous other reports of this issue. Mostly battery related and not due the auto start system.

 

[RSH]

It took me 3 dealer visits to have my issue resolved, the 1st and 2nd time the dealer said everything was normal, 3rd time I said I don't want the BS back until it's fixed. It's been flawless since.

 

[wireman]

I would kindly remind them that this is a hazardous issue with the car shutting down on the freeway and in the middle of an intersection.

Liability comes into play. Appreciate if you would fix it before someone gets seriously hurt.

Documented with Ford is good.

 

[Mark S.]

is auto start/stop playing a factor here?

Like Steve, I don't think the auto stop/start is causal. It MAY be the final event in the sequence. For example, if the battery or one of the connections to it fails the the car is running solely on power supplied by the alternator. If the start/stop system shuts the car down at that point you will not be able to restart until you fix the problem with the battery.

 

[BravoAlpha]

Like Steve, I don't think the auto stop/start is causal. It MAY be the final event in the sequence. For example, if the battery or one of the connections to it fails the the car is running solely on power supplied by the alternator. If the start/stop system shuts the car down at that point you will not be able to restart until you fix the problem with the battery.

right. If the auto start/stop were deselected, would it happen anyway on the road stopped in traffic? This is the Internet so let me be clear - when the engine stops, so does the alternator which is supplying your primary source of electrical power. My main concern along with everybody else’s is, these things are shutting down and going dark in dangerous situations. Disabling the feature, allowing the engine to run allows you to drive and maintain electrical power. Would we have a better chance if we disabled the feature?

Obviously, this doesn’t alleviate the problem. If the battery has issues or connection issues… you’re gonna get stuck somewhere eventually. I’d rather be stuck at the gas pump or at Costco rather than in the middle of I-44.

Batteries can do some weird things and modern vehicles are drawing power from them all the time. Now imagine stop and go situations on busy streets stop signs and rush-hour traffic and the battery is working overtime having to restart the engine several times.

 

[sajohnson]

A potentially related thread:
https://www.broncosportforum.com/forum/threads/power-loss.6341/

 

[Ale]

is auto start/stop playing a factor here?
[/QUOTE]
This morning the service manager at the dealer told me that the battery was completely depleted (two weeks ago he told me it was in perfect health, I could Get another 2yrs out of it… I know the amount of driving I do, and find it hard to believe). In an any case, today they told me the start/stop feature might be too much for the battery.
the car was designed with this battery to support the start/stop feature, if the battery can’t take it, then the wrong battery was installed from the factory, or there’s an error in the design…. In my opinion, again,I know nothing about cars.

 

[Ale]

Hi All
I have A 2022 OB Sport… 36k miles.
it’s been twice in one month that I’ve had to tow the car on a flat bed because the car completely shuts down while driving. The first time left me stranded in the middle of the highway during rush hour, and last night on the intersection, in rush hour.
when it shuts down nothing works, absolutely nothing, not even the hazard lights. All electrical features are disabled, the wheels lock, can’t turn it back on.

I’ve taken it to Ford and they claim they can’t recreate the issue and they deemed the car “fine”. A car that randomly shuts down is not “fine”. I’ve asked them to check batteries, alternator, maybe there could be a short circuit… idk, I’m not a mechanic just going by common sense, but the people at Ford claim they hook up the computer, all the error messages were cleared (erased) and the car is fine… all that means to me is that they reset the computer, that just eliminates error messages, but doesn’t solve the issue.
last night I was told it could even be a network problem….
has anyone encountered this and what was your outcome?
thanks!

they have replaced the battery as it was completely depleted. Two weeks ago I asked Them to check the battery and they told me it was in perfect condition and still had a couple of years left.
I know The amount of driving I do, and I doubt it, but i haven’t had the car for two years yet.
they also told me it could be the start/stop feature causing the issue. I don’t buy it. they will keep it this week to run more tests.

Question for you all… did anyone ever get a low battery message/ light/ warning? If the battery was depleted how come the car never gave a warning in all two weeks of use?

 

[Ale]

It took me 3 dealer visits to have my issue resolved, the 1st and 2nd time the dealer said everything was normal, 3rd time I said I don't want the BS back until it's fixed. It's been flawless since.

How did they fix it?

 

[RSH]

How did they fix it?

Dealer replaced the battery, the original was a FoMoCo lead acid battery, it was replaced with a Motorcraft AGM.

 

[Bucko]

There have been enough posts about loose ground wires that it's certainly worth checking them first, before troubleshooting.

Without physically checking, a loose ground may not be found during routine testing. It may only cause problems after the car has been subjected to vibration.

In fact, even owners of a trouble free BS might want to confirm that all ground connections are tight.

Without an assembly manual at hand, it could be difficult to locate all grounds. No doubt there will some under or inside the dash, under the frame, etc.

A difficult task for many. I'd suspect and expect this would be something a Ford mechanic would check when casing an electrical fault.

 

[I-gor]

Please keep us posted with service department updates. It will be interesting to see if the issue is indeed battery related only. Sorry your BS is being a pain.

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