Truck shows charged to 100% without being plugged into a charger.

[KentuckyKeith]

It was midday yesterday (2/11/26) and I had been doing some running for work. Nothing out is the ordinary. As I’m driving down the road I look down and my distance to empty shows 223 with a charge of 100%. Well that’s impossible….i think, but I’m not that well versed on EV’s. Either way, I plug my truck in each night at home and I’m set to charge to 80%. It does that really well and each morning I have about 183 miles and an 80% charge when I start my day. Yesterday was no different. Except midday in the middle of my running and without having plugged up again since leaving the house; my battery state shows 100% charged. It’s now down to 93% and I have no plugged in, not even last night at home. Any ideas how this happens, or what happened?

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[chriserx]

Which nav software were you using?
The 100% has been common lately with some update, I don't ever really use any nav, is that your range or the trip remaining
It just occurred to me you could be in a non ER. So yeah likely nothing to worry about.

 

[KentuckyKeith]

I generally use google maps through apple CarPlay. Not sure how that might play into it, but this definitely isn’t my forte. I don’t think google maps was estimating the charge percentage or the range though.
Here’s my problem with thinking maybe third party software saw the battery state where it was at that exact time and keyed on that as a 100% charge and then started to show the battery drain from there. In that case, the mileage to empty should’ve show closer to 170mile. But this jumped the mileage up to 223 so software would’ve had to understand what the range for a full charge is

 

[chriserx]

Clarify which battery you actually have to be sure. If I understand correctly you had just unplugged, taking a trip, and it shows 100% charge. IIRC see the PT update thread and check if your truck was updated recently.
https://www.ford.com/support/software-updates

Edit: I just saw the full thread title, when was your last charge and to what level?

 

[proprepper]

Congratulations, your truck has more gremlins than mine does.

 

[Heliian]

You recently received an update and your charge locations and preferred charge times reset, you went to leave the house and voilà, 100%

You'll need to redo them.

At least that's what happened to me this week.

 

[Maquis]

Agree….you got an update that deleted your charge limit and it charged to 100%. You probably didn’t pay attention to it until later in the day.

 

[KentuckyKeith]

It could be the update and I’ll check my settings. But I think I wasn’t clear about when it showed 100%. When I left the house around 8am it showed 80% charged. I did some driving through the day for work. Probably 25 miles or so that morning (this is common for me). At about 1pm as I’m driving between places I have to go for work, I looked down and saw that my battery was at 100%. Bear in mind that at 8am it was at 80%, I had driven some miles, I did not plug in anytime while making those runs for work, and then at 1pm, having not charged since I unplugged at 8am to leave the house, I showed 100%. How can I go from what was probably 60% to 100% without charging. That’s not possible! But that’s what the dashboard shows!

 

[chriserx]

It could be the update and I’ll check my settings. But I think I wasn’t clear about when it showed 100%. When I left the house around 8am it showed 80% charged. I did some driving through the day for work. Probably 25 miles or so that morning (this is common for me). At about 1pm as I’m driving between places I have to go for work, I looked down and saw that my battery was at 100%. Bear in mind that at 8am it was at 80%, I had driven some miles, I did not plug in anytime while making those runs for work, and then at 1pm, having not charged since I unplugged at 8am to leave the house, I showed 100%. How can I go from what was probably 60% to 100% without charging. That’s not possible! But that’s what the dashboard shows!

Eat any mysterious candy lately?

 

[electricpig]

Try charging intentionally to 100% and see what happens. If you have OBE scanner and software, check for voltage variation after intentionally changing to 100%. Also check the 12V battery. A weak.12V.creates strange issues. How old is the 12V battery?

 

[jberry2]

My 2023 Lightning Pro has the same issue. It updated a couple of days ago and now reads 100% charge even though I had it set at 70% on the app. Now the target charge slider on the app is set at 100% and I cannot adjust it. I closed the app and reopened it to no avail.

 

[MountainAlive]

 

[KentuckyKeith]

No mysterious candy, I don’t drink, and I don’t do drugs. That’s how I can afford a Lightning.

It’s also not a charge settings issue on the app. That is set to 80% and that’s where it stops, every time. That part isn’t giving me any problems.

The problem is where did the charge come from in the middle of the day without me ever hooking up to a charger. This is super concerning to me because if there was a system malfunction and the system use the current battery state to be 100% at the time of the malfunction and reading the battery status. Will that charge status now become my 100% mark and won’t go any higher. So basically I was at about 60% battery life when it went to 100%. So is 60% now my ceiling? Am I just going to lose the upper 40% of my battery for usage?

 

[chriserx]

So, assuming everything you are stating is accurate, your best bet is to check your codes, next, reset your 12v system by disconnecting battery, most suggest 30 min but I think 5 min is enough, and disconnect the OBD just in case the fault is there, unlikely but you never know. This is just to check for weird glitches/relay issuesSee if the problem returns. If it does, it's time for a professional. Based solely on the fact the swap from SR to ER is so easy, you may also want to check your total battery capacity and current kWh levels when both encountering and not encountering the issue. The next 2 most likely suspects are gonna be the HV BMS and an intermittently failing module, maybe through some wiring in the battery (either of these should have thrown a light though). There are other potential causes, but that's why you likely need to get it checked.

 

[Maquis]

What you claim happened makes no sense. Try to reproduce it And report back.

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