12 volt Battery recall

[Walter56]

Read of a recall on the bronco sport concerning 12 volt battery. Considering made in same place as Maverick got to wonder if it's same issue as others have here regarding current sensing

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[KevCuRaoi]

Read of a recall on the bronco sport concerning 12 volt battery. Considering made in same place as Maverick got to wonder if it's same issue as others have here regarding current sensing

Are you talking about 24S60? That covers 76 2024 Bronco Sports only (all built on Oct 24th 2023):
All of the affected vehicles were incorrectly produced with 2023 Model Year Powertrain Control
Module (PCM) calibrations. Affected vehicles are unable to receive the remedy software associated with safety recall 24S24 or may have received an incomplete repair under 24S24. If the remedy is not complete, the BCM and PCM calibrations may be unable to detect a sudden battery degradation while driving. If the battery suddenly degrades during a drive it can lead to a vehicle that is unable to restart after an auto stop/start event or experience a stall while coming to a stop at low speed. Either of these conditions may be accompanied by a loss of 12-volt accessories, including hazard lights. A loss of motive power can increase the risk of a crash.

The software update isn't available yet, but I doubt it will take long.

 

[sanpablo]

I believe the Maverick has had this recall-24S24

 

[Darnon]

I believe the Maverick has had this recall-24S24

Correct, and it primarily concerns to EcoBoosts where the battery is under the hood. Ford's determination was that the under hood temperatures could result in a failure of Flooded Cell batteries while driving that the Battery Monitoring System would not detect, resulting in the battery charge dropping too low to start under auto-start/stop operation.

The investigation revealed that MY 2021-2024 Ford Bronco Sport and certain MY 2022-2023 Ford Maverick vehicles are equipped with a 12V enhanced flooded battery (EFB), which may experience an abrupt failure during a drive cycle. The failure is the result of an internal corrosion issue, which is influenced by long exposure to high under-hood temperatures. If the sudden loss of 12V battery voltage is not detected by the vehicle’s battery management sensor, the vehicle can experience a loss of power event without providing any warning to the driver. Following a loss of power due to battery failure, the vehicle may be without all 12V accessories including hazard lights and typically will not be able to be restarted.

 

[Old Fart]

My hybrid low voltage battery took a dump in May, seems to like the replacement.

 

[OneAlienBoi]

So I have a question guys pertaining to the 12V battery and the recalls, some reports are claiming the software recalls have effectively addressed this issue, but also that Maverick's with the older, less durable batteries are swapped out with what's called AGM or AGA batteries or something like that, which are apparently much higher quality.

Is this true? I've heard some owners say yes, their battery was changed, and others say no, the dealer didn't swap or touch the original battery.

 

[710-oil-614]

So I have a question guys pertaining to the 12V battery and the recalls, some reports are claiming the software recalls have effectively addressed this issue, but also that Maverick's with the older, less durable batteries are swapped out with what's called AGM or AGA batteries or something like that, which are apparently much higher quality.

Is this true? I've heard some owners say yes, their battery was changed, and others say no, the dealer didn't swap or touch the original battery.

The dealer is not going to put an AGM battery in, you would do that yourself.

AGM batteries are superior batteries to flooded cell batteries so they handle the draw better, can charge quicker, etc but they aren't going to solve the 12v battery issue that plagues the hybrids.

 

[23grayXLT84]

Deep sleep season is slowly approaching. Getting ready for influx of posts come November.

 

[OneAlienBoi]

The dealer is not going to put an AGM battery in, you would do that yourself.

AGM batteries are superior batteries to flooded cell batteries so they handle the draw better, can charge quicker, etc but they aren't going to solve the 12v battery issue that plagues the hybrids.

If it's a much better battery, why won't it solve this issue by swapping it in?

 

[710-oil-614]

If it's a much better battery, why won't it solve this issue by swapping it in?

Because it treats the symptom (dead/low voltage battery) due to the problem (BMS).

It’s like having a head gasket leak and putting a quart of oil in every fill up. You aren’t fixing the problem you’re just addressing a symptom.

 

[OneAlienBoi]

Because it treats the symptom (dead/low voltage battery) due to the problem (BMS).

It’s like having a head gasket leak and putting a quart of oil in every fill up. You aren’t fixing the problem you’re just addressing a symptom.

So how can we permanently address the problem itself? What is BMS if you don't mind me asking?

 

[710-oil-614]

So how can we permanently address the problem itself? What is BMS if you don't mind me asking?

BMS is the battery management (or monitoring) system that is supposed to keep your 12v sufficiently charged.

There are a number of factors that contribute to the 12v battery issues with hybrids but the DC to DC charge does to seem to be a culprit as well as the constant draw for the 4G modem and other things like key fob and proximity entry.

Basically even when your vehicle is off, there’s a lot going on still that is draining the 12v battery.

Ford’s BMS is doing a poor job managing parasitic draw on the flooded cell battery and it’s an issue.

AGM batteries hold up better but still will succumb to the same strains over time.

 

[pigsareus]

Because it treats the symptom (dead/low voltage battery) due to the problem (BMS).

It’s like having a head gasket leak and putting a quart of oil in every fill up. You aren’t fixing the problem you’re just addressing a symptom.

add to it the cost of an AGM is substantially more than a flooded so for sure Ford isn't going to pony up for that even if that was the fix....

 

[MakinDoForNow]

BMS is the battery management (or monitoring) system that is supposed to keep your 12v sufficiently charged.

There are a number of factors that contribute to the 12v battery issues with hybrids but the DC to DC charge does to seem to be a culprit as well as the constant draw for the 4G modem and other things like key fob and proximity entry.

Basically even when your vehicle is off, there’s a lot going on still that is draining the 12v battery.

Ford’s BMS is doing a poor job managing parasitic draw on the flooded cell battery and it’s an issue.

AGM batteries hold up better but still will succumb to the same strains over time.

Ok what if it's something half stupid. Like the BMS telegraphs BCM (or?) that it needs 14.6v for battery and BCM combines all requests for current and DCDC produces 14.8v to get current on buss. Then BMS sees the 14.8 and says "too much, I cannot use it" and waits for 14.6v. so do we need to install a variable "regulator" to boost or limit voltage at battery positive to what BMS is asking for???
Edit to add:
Thoughts of by ex programmer who spent years debugging others work!

 

[23grayXLT84]

Ok what if it's something half stupid. Like the BMS telegraphs BCM (or?) that it needs 14.6v for battery and BCM combines all requests for current and DCDC produces 14.8v to get current on buss. Then BMS sees the 14.8 and says "too much, I cannot use it" and waits for 14.6v. so do we need to install a variable "regulator" to boost or limit voltage at battery positive to what BMS is asking for???

This isn't rocket science, it's a basic function (for a vehicle to charge it's 12v) that's been around for years...

Guess Ford can't master the art of 12v charging along with CV axles and backup cameras that must communicate via a dialup connection to the infotainment system

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