HYBRID 12V Battery Mystery SOLVED

[Finnster]

Well I'm gonna monitor mine a bit and see. I've not had any issues at all, but I know someone with a 25 that has. But I did all the software upgrades at Ford

Add me to the list!
No issues here either, except for slowly dropping 12V resting voltage.
I have 2 outstanding recalls 25C69 & 26C10, Integrated park module update and trailer module reprogramming.
I need to get those done to see if I notice any improvement in 12V SOC.

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[rslilly76]

Add me to the list!
No issues here either, except for slowly dropping 12V resting voltage.
I have 2 outstanding recalls 25C69 & 26C10, Integrated park module update and trailer module reprogramming.
I need to get those done to see if I notice any improvement in 12V SOC.

had the park done
waiting on trailer one

 

[rslilly76]

Add me to the list!
No issues here either, except for slowly dropping 12V resting voltage.
I have 2 outstanding recalls 25C69 & 26C10, Integrated park module update and trailer module reprogramming.
I need to get those done to see if I notice any improvement in 12V SOC.

all batteries will drop slowing while parked, look at this. My average is 12mA

A 12mA (0.012A) parasitic draw is very low and considered normal for most modern vehicles, typically powering memory settings for radios and computers without draining the battery. Acceptable ranges are generally under 50-85mA. A 12mA draw is unlikely to be the cause of a dead battery. [1, 2, 3, 4]

 

[Jims Maverick]

I was getting the low battery warning often on my 2023. I decided to try something on my own. I bought a NOCO5 and charged the battery completely. At that stage I did the battery reset and then per the manual, let the truck sit overnight before starting it (actually, a bit longer). Next daydid business as usual. From that point on, I rarely get the low battery notifications. Went away for 10 days, and never got a notification at all.
At the least, try the battery reset per the manual.

 

[MakinDoForNow]

I was getting the low battery warning often on my 2023. I decided to try something on my own. I bought a NOCO5 and charged the battery completely. At that stage I did the battery reset and then per the manual, let the truck sit overnight before starting it (actually, a bit longer). Next daydid business as usual. From that point on, I rarely get the low battery notifications. Went away for 10 days, and never got a notification at all.
At the least, try the battery reset per the manual.

Anytime the dome light does not light up put the noco5 on the jump pins.

 

[First Sergeant]

I was getting the low battery warning often on my 2023. I decided to try something on my own. I bought a NOCO5 and charged the battery completely. At that stage I did the battery reset and then per the manual, let the truck sit overnight before starting it (actually, a bit longer). Next daydid business as usual. From that point on, I rarely get the low battery notifications. Went away for 10 days, and never got a notification at all.
At the least, try the battery reset per the manual.

Did you charge battery in the vehicle or remove it and charge? Just curious.

 

[HeyBales]

all batteries will drop slowing while parked, look at this. My average is 12mA

A 12mA (0.012A) parasitic draw is very low and considered normal for most modern vehicles, typically powering memory settings for radios and computers without draining the battery. Acceptable ranges are generally under 50-85mA. A 12mA draw is unlikely to be the cause of a dead battery. [1, 2, 3, 4]

That QA 12 mA micro drain isn't parasitic (that means undesired draw), it's expected to be between 25-50 mA per service manual - so yours is excellent.

It's a reference to the last Sleep period, after the 60 min max things are turning off.
If you do a bunch of short errands you might never reach Sleep, so you'll find it remaining a static figure until you do have a sleep period.
I've found the shorter that is, like an errand was just long it enough it must have just gone into sleep with some tests still to do - the QA reading is 75-90 mA. The longer, the lower. Except I've been getting lots of 60-65 mA lately overnight.

There was another Amp draw PID I saw in that app that didn't start with BCM - that's the one you want.

You can remove the Auto Start/Stop from your view - that's for the EB. As well as predicted Amps, that's for the load cycle request for the alternator - hence a bogus figure.

 

[HeyBales]

I was getting the low battery warning often on my 2023. I decided to try something on my own. I bought a NOCO5 and charged the battery completely. At that stage I did the battery reset and then per the manual, let the truck sit overnight before starting it (actually, a bit longer). Next daydid business as usual. From that point on, I rarely get the low battery notifications. Went away for 10 days, and never got a notification at all.
At the least, try the battery reset per the manual.

No - because it's not a new battery - per the manual.
New batteries need less Amps because of less internal resistance.
Old batteries need more Amps because of more resistance.
That difference does occur in the pre-25MY. Got it in log files from doing that same test.
It likely does a resistance test during the BMS Relearn when it's done intermittently, but the number of days as new battery enters into some calculation.

I'd suggest your full charge was the biggest factor in helping your battery - and that Relearn. Not the Reset.
Now, the Reset did make the Relearn occur the next time it could, as opposed to whatever the normal cycle would have been.

My battery is living at 11.5V morning resting currently - 50% SOC.
No alerts in Ford app. Though max battery saver is enabled with power ports & dash off with door open, light off quickly after door close.

You might want to do another charge up, Relearn overnight - then the point of this thread.

 

[Master Blaster]

Anytime the dome light does not light up put the noco5 on the jump pins.

If your dome light does not come on when you open the door, then your battery is in deep sleep mode and is very close to critical failure.

 

[samspritzer]

If your dome light does not come on when you open the door, then your battery is in deep sleep mode and is very close to critical failure.

That happens to me a lot especially in cold weather, yet the battery is fine. This has been going on ever since I took delivery of the truck.

 

[goulaigan]

In 2025+ yes.
22-24 no.

I was just going to toss my new hitch light for this reason. Are you saying there is a fix for a 2026 Lariat Hybrid?

 

[MakinDoForNow]

If your dome light does not come on when you open the door, then your battery is in deep sleep mode and is very close to critical failure.

Dome light doesn't come on at a higher voltage than the voltage for deep sleep condition. It's Getting close but not there yet .
Dome light will not come on if you have not started truck for, if I remember correctly for 7 days. On my 22 XLT lux pkg I still have my OEM 12v, don't drive it much about 6k miles. It does see my noco 5 quite a bit. If I open door without dome light on and it's been less than 7 days since I have driven it I put noco 5 on jump pins. If I check voltage across jump pins and it's less than 12.1v I will put noco5 on at that time.

 

[rslilly76]

That QA 12 mA micro drain isn't parasitic (that means undesired draw), it's expected to be between 25-50 mA per service manual - so yours is excellent.

It's a reference to the last Sleep period, after the 60 min max things are turning off.
If you do a bunch of short errands you might never reach Sleep, so you'll find it remaining a static figure until you do have a sleep period.
I've found the shorter that is, like an errand was just long it enough it must have just gone into sleep with some tests still to do - the QA reading is 75-90 mA. The longer, the lower. Except I've been getting lots of 60-65 mA lately overnight.

There was another Amp draw PID I saw in that app that didn't start with BCM - that's the one you want.

You can remove the Auto Start/Stop from your view - that's for the EB. As well as predicted Amps, that's for the load cycle request for the alternator - hence a bogus figure.

understood

 

[Master Blaster]

That happens to me a lot especially in cold weather, yet the battery is fine. This has been going on ever since I took delivery of the truck.

The battery is not fine. How are you determining that it is fine?

 

[Mavster Mechanic]

I was just going to toss my new hitch light for this reason. Are you saying there is a fix for a 2026 Lariat Hybrid?

I don't have a 25 or 26. So I don't have the exact steps.

But you just need to customize your trailer settings in one of the trailer menus. Set it to shortest trailer allowed.

If you can put in zero feet, do that.
If it needs a positive integer, put in 1 foot.

Then your blind spot and cross traffic alerts won't be affected by your hitch light. Some folks put on bike racks with integrated lights. Ford started to acknowledge this possibility in 2025.

The older trucks simply turn off alerts.

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