Start/Stop Timing & Battery

[Hugo]

I recently noticed mine doing similar - it would turn off engine then almost immediately restart - seems to be linked to having heated seats turned on and early in my drive - not sure if this is normal behavior or an issue? I have not noticed this behavior now that it has warmed and I am not using the heated seat function

Yeah it's hard to tell if it's a problem or programming. I assumed it was a problem and it turned out to be a bad battery but from what I understand it's also designed to limit use under power consuming conditions. Mine didn't give any alerts before about battery charging. Would be nice if we had a battery condition page in the cluster to give us a heads up of potential problems but I'm sure they would view that as a potential headache.

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[TNKIRK]

Mine has suddenly stopped turning off......Talked with my tech at Ford dealer.......To stop and start....22 items must be right or okay to accomplish this task........He said to sit tight, and not to worry

 

[daemonic3]

My 2017 EB had an option to display the auto start/stop status in the cluster. When mine wasn't turning off I used it to figure out why. It was saying "Engine On due to Battery Charging" because my battery was 4 years old and starting to fade.

But my point is that screen was great and called out the reason it remains ON. I don't know if it is still a display option on the '21s.

 

[SonnyDigs]

Mine stopped working..
Ford says my battery is fine but when I turn the truck off the line comes up on screen like it's downloading something..
It says start engine or turn off engine.. power saving.
That tells me not a fully charged Battery.
Now what?

 

[Hugo]

Mine stopped working..
Ford says my battery is fine but when I turn the truck off the line comes up on screen like it's downloading something..
It says start engine or turn off engine.. power saving.
That tells me not a fully charged Battery.
Now what?

An update to the original post. Ford ended up testing my battery and determining it was bad. They replaced it about 9 months ago. But its kinda doing something similar again.

Mines not quite doing this but I noticed that my truck wont auto-stop lately. Battery just says vehicle charging as a reason. I've been driving it around all weekend. I just measured the battery and its at 12.4 volts resting. I'm wondering if its software/update related.

 

[DT400]

I didn't know about having to have a certain amount of brake pressure as one of the criteria to engage Auto start/stop but if you are stopped and let up on the brake just a bit, not enough to roll but just slightly, the engine will restart.
I use this to start the engine when at a light a few seconds before traffic starts to move...I am not convinced starting the engine and accelerating immediately is a good thing.
Whether or not it matters I don't know but it makes the mechanic/engineer in me feel better.

Darrell

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