Battery - 12v. No start for the first time

[Waterick]

Well, here I am now. I knew the day was coming. I bought my noco5 and Wolfbox jump pak several months ago in anticipation. I have charged it several times starting about nine months ago and just finished a few days on the noco last weekend. I've had the Maverick since November 29, 2023 and have about 9700 miles. I think I made it last this long by never setting up Ford Pass and pulling the telmatics fuse. I did drive the truck over 250 miles this week but it sat from Friday afternoon until this evening. At first, even the jump box would not see the weak battery. It's on charge now, hopefully I can get the dealer to look at it soon. While it's going in, I plan to get at least four s/w recalls done and of course the SSM53801. I know I never leave the HVAC on, but I guess it could cycle because of the humidity here. I was trying to make it until the 25A72 Recall was available in the third quarter. I plan to reinstall fuse 11 prior to taking it to the dealer.

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[Matso]

Interesting. Your new battery is what should have been installed from the factory. And to my knowledge dealerships are not using AGMs as a replacement, only the OEM flooded. I did get them to install an AGM on my hybrid but it was a long battle and I had to pay a $100 upcharge. Incidentally, after about 48 hours of not driving it guess what? The deep sleep mode notification popped up again. The voltage at the battery terms reads 11.88 so it seems that is the approximate threshold for deep sleep mode to initiate. And so it appears AGM batteries are not the answer after all.

 

[HeyBales]

Well, here I am now. I knew the day was coming. I bought my noco5 and Wolfbox jump pak several months ago in anticipation. I have charged it several times starting about nine months ago and just finished a few days on the noco last weekend. I've had the Maverick since November 29, 2023 and have about 9700 miles. I think I made it last this long by never setting up Ford Pass and pulling the telmatics fuse. I did drive the truck over 250 miles this week but it sat from Friday afternoon until this evening. At first, even the jump box would not see the weak battery. It's on charge now, hopefully I can get the dealer to look at it soon. While it's going in, I plan to get at least four s/w recalls done and of course the SSM53801. I know I never leave the HVAC on, but I guess it could cycle because of the humidity here. I was trying to make it until the 25A72 Recall was available in the third quarter. I plan to reinstall fuse 11 prior to taking it to the dealer.

Bummer - mine finally bit the dust after 4 days of much longer drives than normal.
I think the BMS attempt to lighten the charging rate to what was 4 good (eh - decent, never good!) cells failed, and one of them overcharged and joined forces with the 2 other bad ones.

Which recall is that - doesn't appear to be valid that Google can find?
This is close, but past not future.

"Ford Recall 25S72 is a July 2025 recall for a rearview camera."

Also - I think my battery got a bad cell within the first 3 months - which is when the subject came up for me to wonder about - and charging rate & SOC was already low in log files.
So I'd bet the charging you did after a potentially bad cell was too late.

I made it over a 15 months and 12K , only 1 full charge at that 3 month point (when I saw wasn't helping), and never disabled Fordpass access or telematics to Ford.
So I think the undercharging bites the battery pretty early on during any extended off time, or battery drain (I used to sit with radio going truck in Acc mode only). Just never recovers.
It's like the BMS relearn accepts a new low point in reading/testing - and goal changes, and bam!

 

[Waterick]

Bummer - mine finally bit the dust after 4 days of much longer drives than normal.
I think the BMS attempt to lighten the charging rate to what was 4 good (eh - decent, never good!) cells failed, and one of them overcharged and joined forces with the 2 other bad ones.

Which recall is that - doesn't appear to be valid that Google can find?
This is close, but past not future.

"Ford Recall 25S72 is a July 2025 recall for a rearview camera."

Also - I think my battery got a bad cell within the first 3 months - which is when the subject came up for me to wonder about - and charging rate & SOC was already low in log files.
So I'd bet the charging you did after a potentially bad cell was too late.

I made it over a 15 months and 12K , only 1 full charge at that 3 month point (when I saw wasn't helping), and never disabled Fordpass access or telematics to Ford.
So I think the undercharging bites the battery pretty early on during any extended off time, or battery drain (I used to sit with radio going truck in Acc mode only). Just never recovers.
It's like the BMS relearn accepts a new low point in reading/testing - and goal changes, and bam!

Took it ('24 Lariat) to the dealer. Service said all my open recalls have now been rolled into the 23C41 taillight/turn signal stuff (first time to dealer) and they will do that. The fix for the 25S72 recall is not available yet, I was hoping to wait for it. The SSM, the tech will have to look up as they don't have that info according to service writer. Left it there Tuesday night.
They called today; battery checked out OK, They did the recall and applied the SSM (assume 53801) and it's ready. They asked if I wanted them to keep it over another night to make sure the battery holds. I told them that's a good idea and said to do it. If it holds, I'm probably still looking at a new battery real soon. Let you know how it turns out here.

 

[HeyBales]

Oh - that recall for the rearview cameras - was for non-Lariat's with their cheap slow infotainment system. Lariat's weren't part of it.

That would be good if they actually noted battery voltage and compared to next morning.
Not that it'll probably drop a lot - but for mere mA draw that is supposed to occur, probably still more.

 

[Waterick]

Oh - that recall for the rearview cameras - was for non-Lariat's with their cheap slow infotainment system. Lariat's weren't part of it.

That would be good if they actually noted battery voltage and compared to next morning.
Not that it'll probably drop a lot - but for mere mA draw that is supposed to occur, probably still more.

This current recall, 25S72, (just got the notice last week) is for certain 2018-24 Ford Sync System vehicles. Notice does not say Lariat specifically, but there it is. My screen sometimes goes blank, does not hold the camera delay setting, nor the rear occupant reminder setting. When the screen blanks, there is no back-up camera. Fix is supposed to be in third quarter this year. Always get everything back (so far) when I do a Sync reset. Maybe the recall for the XL's and non-Sync XLT's already fixed this for them.

 

[HeyBales]

Well - was trying to find a decent hybrid 12V battery thread to put an update in.
Not a case of search NOT finding anything!
Way too many to select from.
Maybe I'll update others.
Another thought on what's going wrong.

Warranty replacement battery after my use 4/23/24 to 7/25/25 - 15 months usage.
Though Activated 4/8/24 and mfg 48 wk/23.
390 CA or CCA? / 65 RC (really!) / 45 Ah (always tested 100% SOH to that till end, bad tester)

New battery mfg 5/8/25 - newer 585 CA / 470 CCA / 65 RC / ? Ah
Recharged to full 7/26/25.

IIRC key-Acc to Ford's special SOC 83% 12.6V, and with a short drive got up to 85%.
Which is a full battery charge. 85% SOC. So stupid.
Interesting that while driving and engine running - the 12VB is having a 1 Amp discharge, for just some seconds that I caught it for screenshot.
I guess that's why there is a PID for battery cumulative discharge running - prior battery was at 0 for that still.
I guess the age of battery in months never gets reset. BS / BMS Reset routine Zero's out the Cumulative PID's and that age in days.

So here's the interesting thing.
I've been tracking before Key On and HVB brought online, the SOC%, V, and prior sleeps Battery Quiescent Current (which is tracked under Cumulative Dishcharge Sleep Mode), still can't decide if avg or max.

Last 32 days the SOC% & V has of course been dropping steadily - the undercharging issue.
But here's the PID's of what it thinks the cumulative figures are. Based on the sensor on the negative post - which is supposed to be reading amps, I'm assuming the system can tell time correctly for Amp hours math.
This is after driving for a bit, started around 12.1 or 12.2 V, at 74% SOC it's already dropped to only 3A of current, no longer attempting to get back to 85% it appears.

But from the Cumulative readings - the BMS thinks it's ahead.
4 Ah cumulative charge, but only combined discharge of 3Ah.
Even if that's 3.55 rounded up, and 3.45 rounded down - the system still thinks it's ahead.
But the drop proves it's not, by a decent amount.

I'm really thinking that ammeter is not accurate for one direction mainly.
Maybe there's another reason for it's confusion.
Truly just battery degradation, like it's loss just sitting on a work bench, in 32 days?

 

[rknrbt]

I tend to agree but my hard headed hillbilly ways would make that seem like accepting defeat and letting Ford win. I am old and can be a cranky bastard as my dealership is finding out. Now I am being a cranky old bastard with a national case number on this issue. If enough people complain eventually it will get their attention. As my grandpa used to say "the squeaky wheel gets the grease!"

After taking my truck to another dealer as the national service rep advised and them keeping it 8 days they did determine that the battery is indeed bad and in need of replacement. I advised I do NOT want another of the EFB batteries installed, I will only accept an AGM battery regardless of cost. Ford declines to cover or assist with this exchange and any cost will be out of customer's pocket. So $342 later I am home with my truck with a healthy AGM battery and bad feelings toward Ford Motor Company.

 

[OleFordGuy]

After taking my truck to another dealer as the national service rep advised and them keeping it 8 days they did determine that the battery is indeed bad and in need of replacement. I advised I do NOT want another of the EFB batteries installed, I will only accept an AGM battery regardless of cost. Ford declines to cover or assist with this exchange and any cost will be out of customer's pocket. So $342 later I am home with my truck with a healthy AGM battery and bad feelings toward Ford Motor Company.

Well, after ALLLLLLLLLLLLLL this time I'm glad you finally got the AGM battery !!! But still $342.00 out of your pocket
At least that will be a short term fix until the AGM starts to fail. The only real Long Term fix is for Ford to get their head out of the sand and correct the software code related to the battery charging/maintenance (IMO). Until then the noco/agm is probably the best you can hope for.

In all seriousness, I'm happy you stuck with it and made your case. I tip my hat to you sir!

 

[rknrbt]

Well, after ALLLLLLLLLLLLLL this time I'm glad you finally got the AGM battery !!! But still $342.00 out of your pocket
At least that will be a short term fix until the AGM starts to fail. The only real Long Term fix is for Ford to get their head out of the sand and correct the software code related to the battery charging/maintenance (IMO). Until then the noco/agm is probably the best you can hope for.

In all seriousness, I'm happy you stuck with it and made your case. I tip my hat to you sir!

Now you ought to know me well enough by now to know it doesn't just end here, LOL. But I agree Ford needs to come out with software that first of all lets the battery charge more fully. As a 30 year Ford employee now retired I no longer have blind loyalty to the company. I shot down a referral just last week when a friend with a Honda asked about an X plan for a new Escape. I told her to look at a Honda CRV instead and she did a couple days later and bought herself a new one!

 

[Waterick]

Took it ('24 Lariat) to the dealer. Service said all my open recalls have now been rolled into the 23C41 taillight/turn signal stuff (first time to dealer) and they will do that. The fix for the 25S72 recall is not available yet, I was hoping to wait for it. The SSM, the tech will have to look up as they don't have that info according to service writer. Left it there Tuesday night.
They called today; battery checked out OK, They did the recall and applied the SSM (assume 53801) and it's ready. They asked if I wanted them to keep it over another night to make sure the battery holds. I told them that's a good idea and said to do it. If it holds, I'm probably still looking at a new battery real soon. Let you know how it turns out here.

Did get the truck back today, same old battery. I guess it held enough overnight, never got to see the tech. They did apply the recalls and the SSM according to the SA. The courtesy lights did come on and the dash lit up when I opened the door. However, when I plugged my Scan Guage II back in, it only showed 11.7 volts with the ignition off. So, not too promising. Maybe, the battery will last until the 25S72 Recall fix is in. Hopefully, replacement batteries will be AGM's by then. A side note: so far, the Sync screen is now working as designed and holding it's settings.

 

[dochawk]

I did get them to install an AGM on my hybrid but it was a long battle and I had to pay a $100 upcharge. Incidentally, after about 48 hours of not driving it guess what? The deep sleep mode notification popped up again.

There are parallel threads on the F-150 forum.

Between there and here, and having read dozens of threads on this, I've found a few commonalities:

1) Putting in an AGM often, but not always, solves the problem.

2) Vehicles that shipped with AGM are not immune from this problem.

3) Putting in an ABM battery seems to solve the problem every time (at least if you also do the reset called for when replacing battery)

 

[MakinDoForNow]

Bummer - mine finally bit the dust after 4 days of much longer drives than normal.
I think the BMS attempt to lighten the charging rate to what was 4 good (eh - decent, never good!) cells failed, and one of them overcharged and joined forces with the 2 other bad ones.

Which recall is that - doesn't appear to be valid that Google can find?
This is close, but past not future.

"Ford Recall 25S72 is a July 2025 recall for a rearview camera."

Also - I think my battery got a bad cell within the first 3 months - which is when the subject came up for me to wonder about - and charging rate & SOC was already low in log files.
So I'd bet the charging you did after a potentially bad cell was too late.

I made it over a 15 months and 12K , only 1 full charge at that 3 month point (when I saw wasn't helping), and never disabled Fordpass access or telematics to Ford.
So I think the undercharging bites the battery pretty early on during any extended off time, or battery drain (I used to sit with radio going truck in Acc mode only). Just never recovers.
It's like the BMS relearn accepts a new low point in reading/testing - and goal changes, and bam!

The BMS relearn is why I will put my noco g5 on and let the optimization cycle complete and then lock the truck (maybe after 3 days it takes to finish optimization) for the BMS relearn with noco left on. THEN I WILL UNLOCK DOOR AND OPEN IT SHUT IT. THIS RESTARTS NOCO AND THEN I LOCK DOOR WHICH RERUNS, I THINK BMS RELEARN. might do it one or two more times. BMS sees 12v several times at full voltage. Seems to help. If hood is left up overnight then the jump points will show the 12v voltage without turning anything on by opening the door to access the battery. You can check 12v every few hours for several days without turning anything on and monitor rate of discharge.

 

[HeyBales]

The BMS relearn is why I will put my noco g5 on and let the optimization cycle complete and then lock the truck (maybe after 3 days it takes to finish optimization) for the BMS relearn with noco left on. THEN I WILL UNLOCK DOOR AND OPEN IT SHUT IT. THIS RESTARTS NOCO AND THEN I LOCK DOOR WHICH RERUNS, I THINK BMS RELEARN. might do it one or two more times. BMS sees 12v several times at full voltage. Seems to help. If hood is left up overnight then the jump points will show the 12v voltage without turning anything on by opening the door to access the battery. You can check 12v every few hours for several days without turning anything on and monitor rate of discharge.

Pretty good process.
I thought I did see reference to how often the relearn is done - since it does a little testing of draw rate to attempt to figure things out, doesn't want to do it every night.

Now - there is a sensor for hood open, despite no light. It's why you can get a mis-lock chirp, and truck will tell you if you go Ready with it open.

I'm guessing that's one Ford has figured out how to go ahead and make the module sleep, just as if there was a light there to eventually turn off.

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