5/23/2024: Recall 24S24 on hold (as of 5/24/2024 hold is lifted)

[Colonel Angus]

Hi guys. It's been a while since I last visited the forum. Just lost interest and involved in other things. Hope everyone is doing well. I just received the Recall Notice yesterday in the mail. So I guess it's a go to have it done. Going to try and schedule a mobile appt soon. My '23 BS has been excellent although it doesn't get driven much. Just broke 1200 miles since I got it last July. I've had the battery tender on it regularly and it's running just fine.

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[Dude]

Yes Recall 24S24 is a go and is recommended to have done. Just had mine done last Thursday via mobile service. It’s a quick update. I’ve had no issues before or after.

 

[Colonel Angus]

I really like the idea of the mobile service coming to the house. I wonder if they do oil changes also?

 

[Dude]

I really like the idea of the mobile service coming to the house. I wonder if they do oil changes also?

Yes and all these services as well from one of the local Ford dealership mobile service:

Oil changes
Tire rotations
Wiper blades

Fluid Exchanges
• Power steering
• Transmission
• Brake Fluid

Engine air filters
Cabin air filters
Fuel filters
Fuel injection service
Throttle Body service
Differential service
Customer Pay Batteries
Qualifying manufacturer Recalls

 

[Colonel Angus]

Great. Kill two birds at once. Recall fix and an oil change. Oil life is down to 23%.
Thanks for the info.

 

[rdc17]

Does the recall fix reset custom tire circumference values programmed via Forscan back to stock?

 

[Dallas911]

Little did we know the BS's we bought were actually plug-in hybrids.

 

[sajohnson]

I have a question, but first some quotes from the NHTSA pdf:

Recall 24S24 says:

* "An insufficient calibration strategy for detecting sudden battery degradations during a drive cycle..."

* "The BCM and PCM calibrations are unable to detect a sudden change in the 12volt battery State of Charge (SOC) during a drive cycle."

* "From December 2023 through March 2024, the Low Voltage Power Supply Engineering team conducted system and vehicle level testing and teardowns with batteries with various physical conditions and state of charge. The testing revealed that the Body Control Module (BCM) and Powertrain Control Module (PCM) calibrations are unable to detect the battery failure on these vehicles, which can result in a LOMP [loss of motive power] if the alternator is unable to keep up with the electrical load demand or if an Auto Stop-Start event is initiated."

* " The update BCM calibrations M1PT-14F390-ACG (Bronco Sport), NZ6T-14F390-ADD (Maverick Gas), NZ6T-14F390-BDB (Maverick HEV) will provide improved detection of 12V battery SOC during drive cycles, inhbit auto stop/start in the event of a low SOC, and provide notification to the driver if the battery is degraded. The updated PCM calibrations M1PA-12A650-UE (MY21), N1PA-12A650-AE (MY22), P1PA-12A650-AF (MY23), R1PA-12A650-AD (MY24) will increase the alternator output threshold to maintain vehicle operation if a low 12V battery SOC is detected during a drive cycle."

* See: https://static.nhtsa.gov/odi/rcl/2024/RCLRPT-24V267-6161.PDF

Our recall letter also refers to: "sudden battery degradation" and "a sudden change in the 12V battery SOC..."

Question:

1) What would cause a "sudden" change (decrease) in SOC and/or sudden 'degradation' -- to the point that accessories fail to operate and/or the vehicle stalls?

Language like, "unable to detect the battery failure " and "if the alternator is unable to keep up with the electrical load demand" and "provide notification to the driver if the battery is degraded" is a big clue.

It sounds like the problems people have reported ARE primarily due to defective batteries, and the calibration of the BCM and PCM -- while obviously very important -- is secondary.

 

[ZQ8]

I noticed all that language also and thought it was odd.

 

[Dude]

“Sudden” is an imprecise term and I wouldn’t read too much into it. To me the description is intended to be fairly vague. “Sudden” might mean one thing to you such as instantaneous but might mean something else to another person. It is not descriptive and not precise.

One side note: when the engine is off (with Auto Stop/Start), the battery voltage could read fairly good even though it’s actually has a low charge and when the vehicle starts, a battery could indeed drop in voltage “a lot” (which can appear to be a “sudden” drop due to the added load). That’s one reason a load test is needed (vs a simple voltage test) to assess the health of a battery. I also am being intentionally vague here but you can bet the Ford Low Voltage Power Supply Engineering Team has characterized the issue across a number of vehicles.

The fixes are calibration values only, there is no actual software change as in code.

My opinion .. the batteries are fine. The Recall should fix the primary issue by changing the calibration settings. Some batteries could have been damaged in the past (before Recall 24S24) unless the vehicle was driven sufficiently or was fairly routinely kept on a battery maintainer.

As I’ve said in the past, we do not know the Battery Management System (BMS) algorithms and we can infer alittle more (but not much) via the wording in the recall other than the calibration was incorrect before and is correct now.

While I don’t 100% agree with everything in Post #26, have a look at it if you haven’t had a chance to read it:
https://www.broncosportforum.com/forum/threads/the-new-recall-is-out-now.11156/post-193048

 

[Bronclahoma]

No comments of anyone having a problem after the update, so seems to be good now. I had mine done about three weeks ago prior to a trip to northern New Mexico where I knew I'd be several miles from help if I had a problem.. Since I first got my 21 BL I've been nervous about the electrics. Bought a small jump charger and still carry it.

 

[Dude]

Although I do not have any data on this, my guess is the vast majority of the more than 400,000 owners never saw an issue with their battery and I also guess most either drove the vehicle sufficiently to keep the battery reasonably charged or they are the owners that use a battery maintainer. I didn’t have any issues before Recall 24S24 nor any issues so far in the week after 24S24 was done on my ‘22.

All of the comments (which is about a dozen owners so far) I’ve seen after owners got Recall 24S24 completed relate to the System Off to Save Battery (or similar messages) or the owner stated their Auto Stop/Start didn’t engage as they expected. And a few other owners complained about completely unrelated items like their Sync stopped working so we can ignore those unrelated issues.

The steps for the Tech to install Recall 24S24 include hooking up a battery charger/maintainer but the tech that did my mobile service said if the battery tested good he would not hook one up. I had him test my battery and it tested good.

My guess is those dozen owners reporting the issues above could be due to their battery may have had a low charge, but none of them mentioned the tech checked their battery as part of recall 24S24 so no way to know what caused their issue after they had the recall done,

I think we may know more within the next year on how well 24S24 worked .. if there are no more reports of safety issues with the vehicle dying (due to a low battery) then we can be pretty sure 24S24 worked as Ford intended.

 

[Bronclahoma]

I drive my 23 BL daily, so should be sufficiantly charged. The mobil tech said my battery tested a little low and placed a charger on it before the updates.

 

[Bronclahoma]

Although I do not have any data on this, my guess is the vast majority of the more than 400,000 owners never saw an issue with their battery and I also guess most either drove the vehicle sufficiently to keep the battery reasonably charged or they are the owners that use a battery maintainer. I didn’t have any issues before Recall 24S24 nor any issues so far in the week after 24S24 was done on my ‘22.

All of the comments (which is about a dozen owners so far) I’ve seen after owners got Recall 24S24 completed relate to the System Off to Save Battery (or similar messages) or the owner stated their Auto Stop/Start didn’t engage as they expected. And a few other owners complained about completely unrelated items like their Sync stopped working so we can ignore those unrelated issues.

The steps for the Tech to install Recall 24S24 include hooking up a battery charger/maintainer but the tech that did my mobile service said if the battery tested good he would not hook one up. I had him test my battery and it tested good.

My guess is those dozen owners reporting the issues above could be due to their battery may have had a low charge, but none of them mentioned the tech checked their battery as part of recall 24S24 so no way to know what caused their issue after they had the recall done,

I think we may know more within the next year on how well 24S24 worked .. if there are no more reports of safety issues with the vehicle dying (due to a low battery) then we can be pretty sure 24S24 worked as Ford intended.

For a part to have an acceptable failure rate, it needs to be exponentially lower thand "the vast majority is good." Lot of people on this board have complained about battery failures from the day BS was introduced.

 

[Dude]

For a part to have an acceptable failure rate, it needs to be exponentially lower thand "the vast majority is good." Lot of people on this board have complained about battery failures from the day BS was introduced.

Agreed but we don’t know if a lot is 1,000 or 100,000 that experience the safety issue but Ford stated the numbers are “small”. It is what it is but if similar safety complains continue well into the future after those owners had 24S24 performed, we will know 24S24 did not (fully) solve the safety issue.

As far as numbers on outright premature battery failures, we don’t know that number either.

Unless you work for Ford or have insider information.

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