See this December 2024 note that Ford put out:
Love your work with the logging. I hadn't noticed you did that graph, but after looking at it now I suspect it's just a noise/fidelity issue as you're looking at mV change and we're only talking about +/- 10mV changing thermals from when the vehicle turns off to when it turns on the next time are probably causing the scatter in the plot. It's also what causes people to think their truck is malfunctioning when they see miles of difference in range from when they turn off to when they turn on and/or when the temp changes while driving for whatever other reason. In Oklahoma it's common to get in your vehicle for a 1hr drive then when you step out it's 50+degF cooler or hotter. The battery has zero insulation, so when air is rushing over that aluminum pack case it can really influence the pack temp.
Yep that should be your plan.Well, looks like it's off to the dealer. Did another attempt at 100% charging last night and same result. Once it got to 80% SOC, charging slowed significantly and when it got to 82%, charging stopped and the SOC jumped to 100%. Starting the truck this morning, the truck showed 100% when I got in but as soon as I pressed Start it went to 82%. Same as others have experienced (one example).
SOC:
Charge kW
Sorry for the news!
If you don't/can't immediately drop it off try a slower charge rate if you can, seems to be about 40A already but can't hurt...probably.Well, looks like it's off to the dealer. Did another attempt at 100% charging last night and same result. Once it got to 80% SOC, charging slowed significantly and when it got to 82%, charging stopped and the SOC jumped to 100%. Starting the truck this morning, the truck showed 100% when I got in but as soon as I pressed Start it went to 82%. Same as others have experienced (one example).
SOC:
Charge kW
Ford has disgustingly under advertised the module failure rate, I think it's close to 10%, but they believe if they keep it advertised/believed under 4% they can avoid liability (god knows they need it). If they would've handled it correctly like so many other things they shouldn've done it honestly would be no big deal. A competent tech can replace a module in just 2hrs. But that requires that they have one on the shelf. I've said it for 3yrs+ now, Ford should have an ER and SR standard module sitting on the shelf at every eCertified dealer in the nation,, that's only about 3000 of each. It would have saved them WAY more in black eye value than the cost.
This tracks with what you were experiencing, NMC Li usable range is 3.0-4.2V,, 0.13V variation is 11%, so you not being able to charge past 85% makes sense, the BMS couldn't hold back 95 cells while trying to pump up cell 29.Update. Contacted dealer yesterday and they said they could get to it today so I dropped it off last night. I made sure the Advisor knew about the SSM and gave him a copy (thanks @GoodSam!). He said he had a knowledgeable EV tech that would handle.
Got a text this morning that a battery module is bad, covered on warranty (duh) and is normally $7500. No ETA on when part will arrive. Says Ford will cover a loaner.
Being curious I bought a 3-day PTS subscription. Shows tech connected to FDRS and immediately did a Battery Health test. Then spent the next hour reviewing the Workshop manual.
Battery Health test shows cell 29 in module 3 well below average:
My last Car Scanner look was showing a 0.130 V variation from average which looks to be pretty close to the numbers above.
So I join the "two module failures" club. First one was almost exactly 2 years ago. Module 6.
Could be worse I guess. Ram has 1000's of Etorque generators on backorder with some taking 2 months plus. Took them about 5 weeks to get mine in.
Yeah it's just a guesstimate based on my personal experiences and what I've seen over the past 3 years. Also, personally I know three people who have had two modules fail. I guarantee you Ford is not counting double failures. We know there are just over 100,000 Lightnings in North America. For one Ford dealer in Oklahoma to have replaced over 100 modules seems crazy, but they have kind of touted themselves as being experts in EV service. And they have EV loaners, so it feels like they are going after the business.
.
