F150 LIGHTNING 2022 LARIAT /CODE U019B

[Sahit]

I am not sure if the BMS recalibrates on it's own over time, or how long that would take.

I have heard that can happen in the ICE F-150's, so maybe it is true in the Lightnings.

But in the mean time, one might have an under-charged battery being drained further by the vehicle while in use and by parasitic draws and the BMS will not detect the real SOC of the battery.

When the battery gets down low enough the DC-DC converter is supposed to activate to charge it. But if the BMS thinks the battery is already charged, it will not trigger the DC-DC converter.

If not calibrated when a new battery is added, it may begin to load-shed thinking the fully charged new battery is the depleted old battery, and that could result in errors like the OP observed.

I think if you look for other threads about resetting the BMS you will find this is the case.

Thanks for the explanation, it makes sense.

I also want to add that even the original 12V battery holds the charge fine when charged externally, so the battery itself does not seem to be the issue. This makes me think the problem may be elsewhere, possibly software-related. I have not received any software updates since I imported the truck from the USA.

The vehicle was parked normally in my garage in a fully working condition, and the issue appeared suddenly the next morning without any prior warnings or messages. This sudden failure also points more toward a software or BMS-related issue rather than a bad battery.

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[chriserx]

Interesting, if it were mine, I'd repeat the process of charging and trace down the sound, also open the frunk. Isn't the 12v DCDC in the frunk passenger side?

 

[Sahit]

Based on the code, replacing the battery was a waste of money. Surprised you could find the right battery.

If communication with the BCCM is lost, it has to be restored.

I have no idea what the issue might be, sorry. Buying a modern vehicle without FDRS access is, we'll, crazy IMO.

You are absolutely right. However, when you really like a vehicle and truly want it, you go ahead and buy it. That is exactly how I acted, because I really love the F-150 Lightning. At the time, I did not think carefully enough about the possible complications or problems that could come with it.

 

[Sahit]

Interesting, if it were mine, I'd repeat the process of charging and trace down the sound, also open the frunk. Isn't the 12v DCDC in the frunk passenger side?

Thank you for the suggestion, I really appreciate it.

From my observation, the clicking “tick-tick” sound is coming from underneath the vehicle. It happens more frequently when the 12V battery voltage starts to drop, especially when it goes below approximately 12.4 volts.

This makes me think the DC-DC system may be repeatedly trying to engage and disengage as the voltage falls.

 

[Sahit]

We can help you fix this if you are handy with diagnostics and electrical, have tools, and are willing to work on your own vehicle.
You will need to get, FORScan, and remove the frunk tub. As soon as you let me know all of this is possible I will send you instructions on what to check.

Thank you very much, I really appreciate your willingness to help.

Yes, I already have FORScan and I am comfortable working with diagnostics and electrical systems. I also have the necessary tools and I am willing to remove the frunk tub and work on the vehicle myself.

Please let me know what steps I should follow and what exactly I need to check. I am ready to proceed as soon as you guide me.

 

[Sahit]

Could some animal chewed up the wiring? I would have a good look to see if you can find any signs of that.

It is possible, but I also have other vehicles parked in the same garage and I have never had this happen before. The garage is always kept closed, and I have never previously experienced any issues with animals or damaged wiring.

Of course, I will still perform a careful visual inspection just to be sure.

 

[Sahit]

Well, since he's in Europe . . ANY help is better than NO help at all...
But it has to suck having a unicorn in Europe....that is having problems.

Thank you all so much for your time, patience, and willingness to help — I truly cannot express how much I appreciate the support and guidance I am receiving here. Every suggestion and every comment means a lot to me.

I fully understand how challenging it is to own and troubleshoot this vehicle in Europe, which makes your help even more meaningful to me. I am extremely grateful for any additional guidance you can provide, and I am carefully following every piece of advice shared here.


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[RickLightning]

Sounds like the HVBJB contractors. Just a guess. They click, relays.

 

[evowner]

It is possible, but I also have other vehicles parked in the same garage and I have never had this happen before. The garage is always kept closed, and I have never previously experienced any issues with animals or damaged wiring.

Of course, I will still perform a careful visual inspection just to be sure.

I agree, but if your other vehicles are ICE (internal combustion engine) that may be a repellent. The F150 Lightning has a bunch of clean hiding spots easily accessed from the bottom. Lastly from what I understand the insulation consists of plant-based materials in some parts of the wiring harness. It is an issue in the US.

 

[ZSC100]

Thank you very much, I really appreciate your willingness to help.

Yes, I already have FORScan and I am comfortable working with diagnostics and electrical systems. I also have the necessary tools and I am willing to remove the frunk tub and work on the vehicle myself.

Please let me know what steps I should follow and what exactly I need to check. I am ready to proceed as soon as you guide me.

OK, First, with the 12V charged, you can leave your charger on it, in the vehicle while performing all of this. Turn on the vehicle and clear all DTCs with FORScan.

If any are persistent such as the one this thread is about, What module is exhibiting the DTC?

This will tell us where the break in communications is. Here is a high level breakdown of the CANetworks:

 

[chl]

Interesting, if it were mine, I'd repeat the process of charging and trace down the sound, also open the frunk. Isn't the 12v DCDC in the frunk passenger side?

Yes it is under the frunk floor in the center per this video.


I did not see the OP say if he went through the re-calibration routine for the 12V battery BMS - hopefully he did that.

But the clicking combined with the error code does seem to point to the HV battery contactors being the source/symptom of the problem - since the DC-DC inverter gets it's 'juice' from the HV battery, if there is a problem there the 12V battery would not be getting charged.

 

[Sahit]

Yes it is under the frunk floor in the center per this video.


I did not see the OP say if he went through the re-calibration routine for the 12V battery BMS - hopefully he did that.

But the clicking combined with the error code does seem to point to the HV battery contactors being the source/symptom of the problem - since the DC-DC inverter gets it's 'juice' from the HV battery, if there is a problem there the 12V battery would not be getting charged.

Thank you very much for this very helpful and meaningful video. I truly appreciate the support from you kind people who are helping me without any personal benefit. I am relying on your guidance to understand what steps I should take next.

 

[chl]

It seems he didn't have the CSP-23B50-S1 done - "Reprogram Battery Charge Control Module" so maybe that is the issue.

November 6, 2024. New! AFFECTED VEHICLES
Vehicle Model Year Assembly Plant Build Dates
F-150 Lightning 2022-2023 Rouge Electrical Vehicle Center October 14, 2021 through February 1, 2023

US population of affected vehicles: 102,112. Affected vehicles are identified in OASIS and FSA VIN

He should check the VIN on-line and/or the sticker on the driver side front door to see if he has one of the affected vehicles.

 

[chl]

Thank you very much for this very helpful and meaningful video. I truly appreciate the support from you kind people who are helping me without any personal benefit. I am relying on your guidance to understand what steps I should take next.

No problem. I'd suggest this check list:

1) did you do the recalibrate the BMS routine after reinstalling the fully charged 12V battery? A problem with the 12V battery system can cause the error.
2) did you check all the fuses? A blown fuse might cause a problem with the 12V system.
3) do you see any signs of wiring or connector damage, corrosion, etc.? This will take a lot of inspecting to find if that is the problem, but the previous posts about narrowing down the communication breakdown with diagnostics should help.
4) did you check your VIN to see if you need the "CSP-23B50-S1 - Reprogram Battery Charge Control Module" - it affected over 100,000 vehicles? You can check it at the Ford.com web site. If you need the CSP, maybe if you contact Ford they can arrange the update.

Because of various laws (export, copyright, etc) sending updates overseas can be a problem. But maybe the US consulate could help with that. A US Embassy is technically US territory so that might be a loop-hole?

I believe the error code and symptoms probably result from one of the above issues.

There is also the possibility the BCCM itself is not functioning properly and needs to be replaced, but that would be last on my list.

 

[Sahit]

No problem. I'd suggest this check list:

1) did you do the recalibrate the BMS routine after reinstalling the fully charged 12V battery? A problem with the 12V battery system can cause the error.
2) did you check all the fuses? A blown fuse might cause a problem with the 12V system.
3) do you see any signs of wiring or connector damage, corrosion, etc.? This will take a lot of inspecting to find if that is the problem, but the previous posts about narrowing down the communication breakdown with diagnostics should help.
4) did you check your VIN to see if you need the "CSP-23B50-S1 - Reprogram Battery Charge Control Module" - it affected over 100,000 vehicles? You can check it at the Ford.com web site. If you need the CSP, maybe if you contact Ford they can arrange the update.

Because of various laws (export, copyright, etc) sending updates overseas can be a problem. But maybe the US consulate could help with that. A US Embassy is technically US territory so that might be a loop-hole?

I believe the error code and symptoms probably result from one of the above issues.

There is also the possibility the BCCM itself is not functioning properly and needs to be replaced, but that would be last on my list.

Thank you very much for your checklist and continued support. Here are the exact diagnostic results after following your instructions:
• The 12V battery was fully charged with an external charger.
• All DTCs were cleared.
• After rescanning, the same fault keeps returning.
Recurring DTC detected across multiple modules:
• U0111 – Lost Communication With Battery Energy Control Module (BECM)
Appears in:
• SOBDM-A
• SOBDM-B
• SOBDM-C
• PCM (Powertrain Control Module)
• APIM
• ACCM
• The MIL is ON for this fault.
• I also checked my VIN online using the official recall database, and it shows that there are currently no active recalls for my vehicle.

• All visible fuses appear to be OK.
• The BECM and its wiring/connectors under the frunk have not yet been physically inspected.

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