L2 charging speed recently dropped 33%

[kdryden99]

I am also seeing the sawtooth charging pattern: 9.25 kw rate then 7 repeated on a 10 minute cycle on my Juice Box 40. I've never seen this in the 2 previous years. It started right after the 4.2.6 update. For how many years after we bought the car are we going have to worry about Ford f__king up our cars without telling us as they “improve” our cars?

Is yours a 2021 job 1?

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[Howard]

Late last week, my 2022 MME installed the DCFC CSP update; earlier this week it installed OTA 4.2.6. I am charging the car for the first time this morning in preparation for a medium range trip later this morning. I have some interesting numbers that I would like to add to the mix of things lol. I use an OBDLink MX+ and Car Scanner app. I started the car and connected my phone to the reader. One of the sensers I was monitoring was the AC Charger Coupler Temperature. The OTA was installed on Tuesday and I haven't driven the car since it was installed. The AC Charger Coupler temperature per the app was 187F. Now I am really sure that was not the correct temperature of the coupler but that is what it indicated with my garage temperature at 80F. I turned the car off and plugged in my Grizzl E charger. AC charger amps was 40A with the car's charger output amps showing 23.2. Charger amps showed a constant 40A until the 23 minute point. At that point, I started seeing it cycle occassionally between 40 and 39A. Charger output power started at 8.93kW. It would dip to 8.88kW or so when charger amps dropped to 39A. FP app shows an 8kW charge rate (I know it clips the number) as it always has. Right now, the car has been charging for 50 minutes and here are some of the parameter numbers:
Charge rate power average: 8.87kW
Charger output current average: 22.67A
AC Charger coupler temperature average: 285F (max detected temperature 290F) - can't explain this at all. I checked the cable and charger port and nothing is even remotely hot. Garage ambient temperature is at 82F.

This is the first time I have monitored a charge at the house. Right now I don't see a change in how the car is charging. My 2022 MME was built in April 2022.

Prior to leaving on our day trip with the 2022, I will move my reader to my 2023 MME and see what the AC charger coupler temperature is showing with it not charging. I will post that information later on this afternoon or evening when we get back. If anyone knows why temperature reading on AC charger coupling is so high, I would like to know. By the way, HVB temperature and coolant inlet temperature have been relatively constant between 78 and 81F. At time of posting this, AC charger coupler temperature is indicating 294F; charge cable and charging port are still cool to the touch.

 

[Howard]

Here are the post charge numbers for my 2022 MME (I have a few minutes before we leave on our trip).
Charge time: 66 minutes
Average charge rate (per car scanner app): 8.86kW
Energy added (per FP app): 6.8kW
Charge rate (per FP app): 8kW
Charger used: Grizzl E Duo (only one car plugged in)
Distance added (per FP app): 33 miles

AC charger coupler temperature immediately started dropping as soon as I stopped the charge. Indicated temperature prior to starting the charge was 183.56F; maximum indicated temperature was 296F. I moved my OBD II reader from our 2022 MME to our 2023 MME (it is currently on OTA 4.2.4); AC charger coupler indicated temperature just sitting in garage was 183.56F. I don't know why this is the case; maybe someone on forum can shed some light on this reading. Anyway, I don't see any difference in how the car is charging after the 4.2.6 update. Both of my MMEs when charging by themselves on our duo charger have shown a charge rate of 8kW in the FP app. This is the first time I have monitored a charge at our house. I have not monitored the charger coupler temperatures when I have DCFC charged on the road; but I have not received any over temperature warnings when charging.

 

[Peugfan]

Is yours a 2021 job 1?

Yes, Production date of Jan 28, 2021. Premium EX AWD.

 

[mkhuffman]

Would love to know if this is as Ford intended for whatever reason or if this needs to be fixed.

I will bet you a six pack it is not intended and there will be an OTA fix in a couple months.

 

[JimmyMachE]

AC Charger coupler temperature average: 285F (max detected temperature 290F) - can't explain this at all. I checked the cable and charger port and nothing is even remotely hot. Garage ambient temperature is at 82F.

AC Charger coupler temperature reading is always way off in Car Scanner. I wouldn't worry, unless you have DTC codes in memory for charger port overheating - P0E5F:27 etc.
https://www.macheforum.com/site/threads/car-randomly-stops-charging.27358/page-5#post-632865

https://www.macheforum.com/site/threads/charge-port-temperature.28722/#post-655071

 

[Howard]

Thanks for information, @JimmyMachE. I have never had any DTC's regarding high temperatures on charging port on either of our MMEs. I figured it was something with the app once I saw that our 2023 MME reading was the same as our 2022 MME reading with no charge being done. Thanks for the links also.

 

[OldEVGuy]

To add my experience with my Job 1 car. I finally decided to have the windshield/roof recalls done, so it's been at the dealers the past few days. Yesterday, when they were calibrating the windshield, the wrench light came on, and they saw the charging port was over 400 degrees. At about the same time, I got a notice on the app saying there was a powertrain malfunction/ AWD fault. I went to the dealer, and was able to talk with a technician. She was working on two Mach-E's that needed the whole charging port harness replaced. She thought mine might need the same thing done. Anyway, it's in line to be diagnosed next week.

 

[JimmyMachE]

it's been at the dealers the past few days. Yesterday, when they were calibrating the windshield, the wrench light came on, and they saw the charging port was over 400 degrees.

Did they measure it with IR thermometer, double-checked with FDRS?

 

[Jim622]

I just noticed this exact same thing on another forum. EV insider. The same questions are being asked with Honda and Volkswagon.

 

[OldEVGuy]

Did they measure it with IR thermometer, double-checked with FDRS?

I didn’t ask. I was assuming FDRS, but I’m not sure.

 

[jgcom]

To add my experience with my Job 1 car. I finally decided to have the windshield/roof recalls done, so it's been at the dealers the past few days. Yesterday, when they were calibrating the windshield, the wrench light came on, and they saw the charging port was over 400 degrees. At about the same time, I got a notice on the app saying there was a powertrain malfunction/ AWD fault. I went to the dealer, and was able to talk with a technician. She was working on two Mach-E's that needed the whole charging port harness replaced. She thought mine might need the same thing done. Anyway, it's in line to be diagnosed next week.

This is fascinating. 400 degrees (I'm assuming F, not C) is crazy hot for anything with electronics and many polymers, and if true the thing would probably "smell hot" and be stinking up the place. Hotter than this would need a non-solid-state sensor in all likelihood, so 400 might really mean that the sensor output was read to be max, wrong or right.

I wonder whether a software bug that many of us suspect is in play is actually causing damage, or if there is an ongoing hardware failure in the charging port assembly that people (like me) are mistaking for a software bug.

Thanks for passing this along!

 

[jeffMachE]

I've now had the "plugged in but not charging" behavior happen 3 times in the last week. Never had this happen in the 15 months I previously had the car. I've even taken to standing at the car to see it start to charge before walking away. Last night, charging was stopped after 3 minutes (according to my JuiceBox app). Really annoying, as I count on the car being charged every night. Luckily I have enough charge to get through the day, but not being able to rely on the car charging overnight is becoming concerning.

 

[Howard]

Most temperature sensing devices I have worked on over the past 4+ decades fail high when the sensor is an "open" circuit and 0 degrees when the sensor is "shorted". During the charge yesterday, mine started at an indicated temperature of 183F and steadily increased during the charge to a maximum indicated temperature of 296F when I stopped the charge for us to leave on our trip. The moment I stopped the charge, temperature started dropping. Like I said before, my 2023 MME AC charger coupler temperature indicated 183F as well with it not being charged. Temperatures were monitored via Car Scanner app.

 

[OH2AZ2OH]

Most temperature sensing devices I have worked on over the past 4+ decades fail high when the sensor is an "open" circuit and 0 degrees when the sensor is "shorted". During the charge yesterday, mine started at an indicated temperature of 183F and steadily increased during the charge to a maximum indicated temperature of 296F when I stopped the charge for us to leave on our trip. The moment I stopped the charge, temperature started dropping. Like I said before, my 2023 MME AC charger coupler temperature indicated 183F as well with it not being charged. Temperatures were monitored via Car Scanner app.

I wonder if the conversion from C to F is being done twice?? If ambient is 82F, but the car thinks it’s getting the temp in C, it might be converting again and getting 180.

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