L2 charging speed recently dropped 33%

Shayne

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This doesn’t seem to apply to my car

I don’t get any alerts of any kind anywhere . Doesn’t stop charging

Amp Just goes up and down
Would be weird if that SSM references our problem as it is for problems back on March 27, 2023 and my problem started after service applied updates on June 7, 2023. It does note that engineering is currently working on a solution for this condition that is expected in June 2023. Maybe we got the solution that caused our problem. Solution was to lower our charging to an up and down average of 32 amp? Here is what was updated to cause the problem.

Ford Mustang Mach-E L2 charging speed recently dropped 33% Screenshot 2023-08-04 131504


Really wonder if I should drop my dumb 40 amps charger down to 32 amp for the 1 to 2 months? Wish someone from Ford would let us know if that is a good idea for now. Started June 7 so the end of September for a fix sounds about right. Around 4 months after the software update caused the problem to fix it. I would be happy if I do not have to go into service again and it gets fixed.
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kennethjk

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Would be weird if that SSM references our problem as it is for problems back on March 27, 2023 and my problem started after service applied updates on June 7, 2023. It does note that engineering is currently working on a solution for this condition that is expected in June 2023. Maybe we got the solution that caused our problem. Solution was to lower our charging to an up and down average of 32 amp? Here is what was updated to cause the problem.

Screenshot 2023-08-04 131504.jpg


Really wonder if I should drop my dumb 40 amps charger down to 32 amp for the 1 to 2 months? Wish someone from Ford would let us know if that is a good idea for now. Started June 7 so the end of September for a fix sounds about right. Around 4 months after the software update caused the problem to fix it. I would be happy if I do not have to go into service again and it gets fixed.
I would derate it for the next couple of months.

I have no idea if the up and down will ruin anything but why take any chances.
 

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Mach-Lee

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Really wonder if I should drop my dumb 40 amps charger down to 32 amp for the 1 to 2 months? Wish someone from Ford would let us know if that is a good idea for now. Started June 7 so the end of September for a fix sounds about right. Around 4 months after the software update caused the problem to fix it. I would be happy if I do not have to go into service again and it gets fixed.
I have no idea if the up and down will ruin anything but why take any chances.
I don't think so, it's just going work like a thermostat and maintain 80ºC at the charge port, which shouldn't hurt anything (J1772 is rated 105ºC). Going down to 32 amp will take longer to charge vs. letting it derate. But do what you want. As long as the car is done charging by next morning probably doesn't matter.
 

Shayne

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I would derate it for the next couple of months.

I have no idea if the up and down will ruin anything but why take any chances.
It means opening the box and messing with dip switches. To be honest I do not know if it is jumping up and down? Maybe I will sit with OBD and see what it does. Rather it just work such that I plug it and forget it to tell you the truth. No such luck with my little pony it needs babysitting at all times ;).

I don't think so, it's just going work like a thermostat and maintain 80ºC at the charge port, which shouldn't hurt anything (J1772 is rated 105ºC). Going down to 32 amp will take longer to charge vs. letting it derate. But do what you want. As long as the car is done charging by next morning probably doesn't matter.
Thanks was not going to bother but always like to treat my tools with respect. So no longevity impact on the converter etc. It is when you are leaving on a trip and press charge to 100% that the slow charging kind of ticks you off. Give it a good amount of time and hope for the best. Really good that this car drives so awesome as it has not sat too well.
 


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I just got 4.2.6 today. I had been charging at 8 kW. I'll find out tonight if this is the update that derates my charger.
 

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Ford knows about it the derate issue, we just need to be patient for the OTA to come in a month or two. In the meantime it's okay to keep charging. It will just take longer.
Just in time for winter... It's comical really.
 

Shayne

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Just in time for winter... It's comical really.
Kind of like my 12V dying at -28C all the time. Come spring I get a software update to fix it until the next winter came. Software now comes on and maintains (auto preparing for drive) itself; third winter bob was your uncle. We have to admit things are getting better all around it is just the few basics that do not work that bring the experience down. Drive, charge and condition/maintain itself is all that is really required. Pushing a door button, carplay, kick to open (working excellent now) are all trivial things that you can get over and work around. I am thinking this winter all should be good in the great white north. That is if no more update surprises are coming.
 

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I think it has been well established as a software bug, but I just charged my car for about 2.5 hours and I maintained 11.4 kW the entire time. My garage was not super hot, but around 80 F. So definitely within the range where others are experiencing problems.

If it is software, why is my car behaving normally when I am up to date on all the OTAs?
 

Shayne

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I think it has been well established as a software bug, but I just charged my car for about 2.5 hours and I maintained 11.4 kW the entire time. My garage was not super hot, but around 80 F. So definitely within the range where others are experiencing problems.

If it is software, why is my car behaving normally when I am up to date on all the OTAs?
Better question is why were ours working perfect for 2.5 years and now don't after the update? Is something now being monitor that is working on yours that is not functioning correctly on others? And yes all experiencing this issue are now envious of you.
 

Murse-In-Airy

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Would be weird if that SSM references our problem as it is for problems back on March 27, 2023 and my problem started after service applied updates on June 7, 2023. It does note that engineering is currently working on a solution for this condition that is expected in June 2023. Maybe we got the solution that caused our problem. Solution was to lower our charging to an up and down average of 32 amp? Here is what was updated to cause the problem.

Screenshot 2023-08-04 131504.jpg


Really wonder if I should drop my dumb 40 amps charger down to 32 amp for the 1 to 2 months? Wish someone from Ford would let us know if that is a good idea for now. Started June 7 so the end of September for a fix sounds about right. Around 4 months after the software update caused the problem to fix it. I would be happy if I do not have to go into service again and it gets fixed.
Mach-Lee is correct. As I was one of the first people to see this problem, had my charge port replaced and am still having the problem. Ford has reached out to me and even scheduled an appointment for me to have this update/fix installed. Unfortunately the update was subsequently delayed, but this is the fix that I was scheduled to get. So when it is out, it’s supposedly going to address the SOBDM issues and hopefully our charging will get back to normal.

Also, I did derate mt wife’s charger down to 32 amps until this gets cleared up. We have grizzl-E classics. It only takes 30 seconds to accomplish.
 

Shayne

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Mach-Lee is correct. As I was one of the first people to see this problem, had my charge port replaced and am still having the problem. Ford has reached out to me and even scheduled an appointment for me to have this update/fix installed. Unfortunately the update was subsequently delayed, but this is the fix that I was scheduled to get. So when it is out, it’s supposedly going to address the SOBDM issues and hopefully our charging will get back to normal.

Also, I did derate mt wife’s charger down to 32 amps until this gets cleared up. We have grizzl-E classics. It only takes 30 seconds to accomplish.
Grizzl-e Extreme here works well. @Mach-Lee mentioned it may be slower and mine is averaging around 32 amp right now therefore it is not jumping from 40 to 32 in equal intervals. It would need to average around 32. Calculated average is 6.4 KW now and assuming about 85% efficient; use to be always over 8. Not really monitoring it but takes longer by a couple of hours (20-80). Would like it fixed but it's good that it is still charging. Getting conflicting opinions about hard capping it? Think maybe this one does not deserve babying? ;)

So no appointment right now did they give you a time frame? Keep us informed and beam us the fix.
 

Murse-In-Airy

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Grizzl-e Extreme here works well. @Mach-Lee mentioned it may be slower and mine is averaging around 32 amp right now therefore it is not jumping from 40 to 32 in equal intervals. It would need to average around 32. Calculated average is 6.4 KW now and assuming about 85% efficient; use to be always over 8. Not really monitoring it but takes longer by a couple of hours (20-80). Would like it fixed but it's good that it is still charging. Getting conflicting opinions about hard capping it? Think maybe this one does not deserve babying? ;)

So no appointment right now did they give you a time frame? Keep us informed and beam us the fix.
I will keep this thread updated. The update mentioned in the SSM is the one the dealership was instructed to install. But then it wasn’t available and my tech had to call the engineer to find out… oh, it’s been delayed. So a waste of everyone’s time at that moment. But it does confirm that the update was the correct one, if it ever gets released.

Also, after downrating the Grizzl-E Classic, I don’t think it’s helping with the charging speed. At 40 amps, things heat up and then charging slows down. At 32 amps, things don’t seem to heat up and are just slow overall. So same result.
 

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Better question is why were ours working perfect for 2.5 years and now don't after the update? Is something now being monitor that is working on yours that is not functioning correctly on others? And yes all experiencing this issue are now envious of you.
My 2021 Premium Job 1 was having this charging issue. Ford replaced the charger port. I have now charged twice from 40% to 80% with a constant rate of 11kw. I am up todate on OTAs. There was a faulty temp sensor in the charger port.
 

kdryden99

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I will keep this thread updated. The update mentioned in the SSM is the one the dealership was instructed to install. But then it wasn’t available and my tech had to call the engineer to find out… oh, it’s been delayed. So a waste of everyone’s time at that moment. But it does confirm that the update was the correct one, if it ever gets released.

Also, after downrating the Grizzl-E Classic, I don’t think it’s helping with the charging speed. At 40 amps, things heat up and then charging slows down. At 32 amps, things don’t seem to heat up and are just slow overall. So same result.
So this seems to be one of those situations where it's the port, the software update, or both. At this point I am hoping to get this update and that it resolves the issue. I hate having parts changed on a brand new car, especially if it doesn't resolve the problem.
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