Recall: 25S02 12V BATTERY INSPECTION

[NJBob]

This recall is for EcoBoost Mavericks with the EFB (MY 22).

Whats EFB?

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[Packer Bill]

Whats EFB?

Enhanced Flooded Battery.

 

[NJBob]

Duh.... If it's an internal battery short/defect it affects any of the cars that use that battery....UNLESS Ford has only installed the bad ones in the Maverick Hybrid (not likely).

I was wondering how any inspection is going to reveal anything. Any internal shorts or opens may not reveal themselves at the time of the test.

 

[NJBob]

Enhanced Flooded Battery.

Thanks

 

[Darnon]

I was wondering how any inspection is going to reveal anything. Any internal shorts or opens may not reveal themselves at the time of the test.

The inspection criteria is literally just 'Does it have a flooded battery still? If so, replace it.'

Owners will be notified by mail and instructed to take their vehicle to a Ford or Lincoln dealer to have their vehicle inspected for the presence of a Ford Absorbed Glass Mat (AGM) 12V battery. If there is not a Ford AGM battery present, one will be installed.

 

[MakinDoForNow]

I also got the message to have my 12 volt battery checked out. Since my Maverick will be 3 years old on March 9th, I decided to take it in and have everything checked before my 3 years are up. Used up my points for a oil change etc. and they said my original battery is still good and doesn't need replacement. (Hybrid truck)

Exactly what I did when my 3/36:was coming up. even though I have 7/100 ESP.
When the quickie hand held checker said battery was ok but low, I went to service rep and said it had been on maintainer regularly and needed a better test. Was told they had to have truck for 2-3 days and I said they could keep it as long as it took to get time on the tester. Left truck there to prevent rescheduling delays if I took it home and scheduled them to pick it up. Called wife to come get me. Service called late next day and said it had a new BXT99RT4A MAX (bigger better than original OEM) as original had a bad cell).

 

[MakinDoForNow]

I was wondering how any inspection is going to reveal anything. Any internal shorts or opens may not reveal themselves at the time of the test.

The long tester (takes 3-4 hours, I believe) charges some, rests some, checks how much charge "sticks", etc. and compares to good battery expectations. A battery at say 75% that is sulfated will gain voltage quicker than a battery at the same SOC that is not sulfated with the same current fed. Voltage will settle faster with an internal short than one without. Tester just has to measure with greater precision.

 

[HeyBales]

Respectfully, how is this not a HYBRID thing? States Hybrid specifically in the article.

Sorry - misunderstanding.

The Recall this thread is about is not a hybrid thing. EB specific.
There was a past recall about the same issue too. EB specific.

There is no recall for hybrids regarding batteries yet. Unlikely to be because the hybrid issue prevents starting and driving - the ultimate safety!

 

[Ozarkbeard]

Do you flash 5 times or high to low 5 times, ending in low? Just flashing is like a warning to other drivers or low high low high 5 times? Confusing!

Turn on the truck.
Put your headlights on lowbeam.
Pull back on the stalk 5 times.
Press the brake pedal 3 times.
WAIT - Within 20 seconds or so, you'll see the red Battery light flash, confirming BMS reset.

Afterward, if possible; lock the truck and let it sit for at least 8 hours. Don't open the truck or pull the driver's door handle during that time.

 

[MavTime]

I'm beginning to think there is no fix if people getting their own AGM eventually still run it low.

Turn on the truck.
Put your headlights on lowbeam.
Pull back on the stalk 5 times.
Press the brake pedal 3 times.
WAIT - Within 20 seconds or so, you'll see the red Battery light flash, confirming BMS reset.

Afterward, if possible; lock the truck and let it sit for at least 8 hours. Don't open the truck or pull the driver's door handle during that time.

Correction, it is probably best to perform both as Ozarkbeard suggested and HeyBales corrected for me.

FYI, it is one or the other. Either the BMS Battery Sensor reset procedure you describe calibrates the BS on the spot, AND/OR leaving it sit for 8 hrs and it calibrates on its own the BMS system.

Unacceptable that both trucks have battery issues and for years now, and it isn't clear if it is a harness, a module, or cheap batteries or all of it. I am beginning to think there is no "real fix" for this or Ford would have handled it a long time ago. I don't care about the app being offline during low battery as much as the stupid smart interior lights not coming on. It effects all Mavs, so I wish more people would ping Ford and the NHTSA and complain.

 

[ShadowBlack XL440]

Duh.... If it's an internal battery short/defect it affects any of the cars that use that battery....UNLESS Ford has only installed the bad ones in the Maverick Hybrid (not likely).

The Hybrids and Ecoboost use different 12v batteries.

 

[Ozarkbeard]

I'm beginning to think there is no fix if people getting their own AGM eventually still run it low.

FYI, it is one or the other. Either the BMS reset procedure you describe calibrates the BMS on the spot, OR leaving it sit for 8 hrs and it calibrates on its own.

Thanks for the clarifications!

I agree about buying an AGM. It may just be kicking the problem down the road, if posts by some AGM buyers are any indication. I'ma just keep using a battery tender until Ford comes up with a fix for the issue. Probably afterward, too. I've used them for years to prolong 12v battery lifetime. It works.

 

[Ozarkbeard]

Duh.... If it's an internal battery short/defect it affects any of the cars that use that battery....UNLESS Ford has only installed the bad ones in the Maverick Hybrid (not likely).

The Hybrid & ecoboost use different sized 12v batteries.

 

[Ozarkbeard]

Enhanced Flooded Battery.

Or, not an Absorbed Glass Mat (AGM) battery.

 

[HeyBales]

I'm beginning to think there is no fix if people getting their own AGM eventually still run it low.


FYI, it is one or the other. Either the BMS reset procedure you describe calibrates the BMS on the spot, OR leaving it sit for 8 hrs and it calibrates on its own.

Unacceptable that both trucks have battery issues and for years now, and it isn't clear if it is a harness, a module, or cheap batteries or all of it. I am beginning to think there is no "real fix" for this or Ford would have handled it a long time ago. I don't care about the app being offline during low battery as much as the stupid smart interior lights not coming on. It effects all Mavs, so I wish more people would ping Ford and the NHTSA and complain.

It's not a BMS reset - it's a BS reset (Battery Sensor).

Per the manual, it's to be used when a new battery is installed, and that's the only time it's mentioned for use.
There are PID's for Days in Service that is reset to 0, and a cumulative Charge/Discharge tally that is reset to 0, and prior Voltage after a long enough rest. (Volts inaccurate after charging)
Those values among several are used in calculating SOC% and battery degrading with age.

In other words - declaring to the BMS system - here's a new battery, update all values to what you see now.
(and why it's such a bad idea to do it when battery wasn't even charged up - just chasing a new low into the ground)

The BMS relearn is only mentioned in the manual via the 8 hrs locked no disturbance.
Which for sure should be done after fully charging the battery as it says, or new battery installed which should be fully charged too.

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