L2 charging speed recently dropped 33%

Mach-Lee

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Same story with my charging. Two years of charging at 40 amps, then 4.2.6 update in June then bam….will cycle between 40 amps and 32 amps. The charge handle on my JB 40 charge port connecter is and always has been barely above body temp so I do not know where this sensor is that says it's hot as hell and the charge rate has to be slowed down.
The temp sensor is on the backside of the pins in the charge port, which get much hotter than the exterior of the plug. You can’t really judge pin temps based on the outside of the plug.
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Is there any way to get a better temp reading on the charge port if the frunk panels are pulled off or is it better to just buy an OBDII reader? I just would like to know is this temp real or is it a bad sensor.
 

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The temp sensor is on the backside of the pins in the charge port, which get much hotter than the exterior of the plug. You can’t really judge pin temps based on the outside of the plug.
Understand but I can feel the handle and not much has changed there. That is an indication that not much has changed since I first got it and charged it the first time. Should we assume something internal was always a problem and we were living on the edge all this time ;) Pins good, nothing melted here. Must be past the users responsible as all looks cleaned and brand new here. 14,000 miles on it so has not been charged that much.

Is the software you mentioned still in the works and possible ETA? Coming up on 3 years and I would like everything done and it running good by then. Making things that did work not is not exciting. Has gotten a lot better and thinking Ford can do it. If that's an AC charging cable or something else I hope they just do it soon and give us EA's a break.
 

azerik

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Would be nice if they told us so we wouldn’t have to find out by accident.
I'm sure there's a LOT of people completely oblivious to it even happening. If they were notified there'd be a lot more demand for it to be fixed, and heck, even might make news, that Ford doesn't want.
 

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I'm sure there's a LOT of people completely oblivious to it even happening. If they were notified there'd be a lot more demand for it to be fixed, and heck, even might make news, that Ford doesn't want.
You’re right, many don’t know. Gd forbid they actually have to fix something because we want it Because it’s supposed to charge the way they advertise it. Better to just annoy the few that know what’s going on.
 


azerik

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If it just dropped to 40amp there wouldn't be that much fallout, it'd be annoying yeah, but not "FFS" annoying.

Currently I'm charing my FFE in the driveway from my WallConnector. It's a 6.6kW car. The charger is currently throwing 3.3kW at it because the handle is too hot for Tesla. (Probably not that related as this is a 11 year old Focus EV)
Ford Mustang Mach-E L2 charging speed recently dropped 33% Screenshot 2023-09-21 at 3.28.52 PM
 

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Is there any way to get a better temp reading on the charge port if the frunk panels are pulled off or is it better to just buy an OBDII reader? I just would like to know is this temp real or is it a bad sensor.
Charge until it derates, then unplug the J1772 and immediately scan the top pins in the port with an IR thermometer. They cool off very quickly, but you might be able to catch a 60-80°C reading.
 

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Update: Finally got the harness today. I was at 65% but decided to charge anyways to test it out. The car was able to charge at 48 amps however there is definitely throttling going on as it wasn't going higher than 44 amps compared to before when i was always around 46/47 amps. Also the zig zag pattern is still occurring but not as predominant as before. So my conclusion is the problem is caused by both software and hardware.
Here is my hypothesis, Ford updated the software to now slightly throttle the charge and oscillate the charge in order to preserve the battery by reading different temp sensors. Due to the bad temp sensor, the software overthrottled and oscillated the current too much causing it to fluctuate more than necessary and even shutting down the charge when charging at 47-48 amps. With the new temp sensor the throttling is getting a proper value and the software update is working as Ford inteded.

Ford Mustang Mach-E L2 charging speed recently dropped 33% Screenshot_20230921_225620_Enel X Way
 

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Update: Finally got the harness today. I was at 65% but decided to charge anyways to test it out. The car was able to charge at 48 amps however there is definitely throttling going on as it wasn't going higher than 44 amps compared to before when i was always around 46/47 amps. Also the zig zag pattern is still occurring but not as predominant as before. So my conclusion is the problem is caused by both software and hardware.
Here is my hypothesis, Ford updated the software to now slightly throttle the charge and oscillate the charge in order to preserve the battery by reading different temp sensors. Due to the bad temp sensor, the software overthrottled and oscillated the current too much causing it to fluctuate more than necessary and even shutting down the charge when charging at 47-48 amps. With the new temp sensor the throttling is getting a proper value and the software update is working as Ford inteded.
I do not see much zig zag in your graph appears pretty steady with small variations. How were you able to get them to actually acknowledge it and fix it?
 

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I do not see much zig zag in your graph appears pretty steady with small variations. How were you able to get them to actually acknowledge it and fix it?
They were able to see some codes in the system and by showing the graph they acknowledged there was an issue. Also, I was able to develop a good relationship with the service department, so they know if I am there it's because of an issue. Still took almost 2 months to get the harness. Yes the zig zag is not as predominant even though it used to be a straight line but I cant complain.
 

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They were able to see some codes in the system and by showing the graph they acknowledged there was an issue. Also, I was able to develop a good relationship with the service department, so they know if I am there it's because of an issue. Still took almost 2 months to get the harness. Yes the zig zag is not as predominant even though it used to be a straight line but I cant complain.
What harness did you get?

mine doesn’t zig zag, goes up and down like a yo-yo after about 45 minutes of straight 40 amp

Ford Mustang Mach-E L2 charging speed recently dropped 33% IMG_2366
 

Shayne

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They were able to see some codes in the system and by showing the graph they acknowledged there was an issue. Also, I was able to develop a good relationship with the service department, so they know if I am there it's because of an issue. Still took almost 2 months to get the harness. Yes the zig zag is not as predominant even though it used to be a straight line but I cant complain.
What I have found is it does not matter if the relationship with service is good or not as they do exactly what Ford allows them to do. Did you have a DTC code for the 105C? Could you please post a copy of your work order for this replacement. Seeing the symptoms and fixes would be good.
 

azerik

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What harness did you get?

mine doesn’t zig zag, goes up and down like a yo-yo after about 45 minutes of straight 40 amp
He only charged for 1.5 hours and it probably wasn't quite hot enough in Canada for the true yoyo to happen.
Ford Mustang Mach-E L2 charging speed recently dropped 33% Screenshot 2023-09-22 at 9.14.36 AM

It's going to have to be less than 60 degrees out to keep the yoyo from happening it looks.
 

kdryden99

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He only charged for 1.5 hours and it probably wasn't quite hot enough in Canada for the true yoyo to happen.
Screenshot 2023-09-22 at 9.14.36 AM.png

It's going to have to be less than 60 degrees out to keep the yoyo from happening it looks.
You obviously have not been paying attention to this thread. I was the one who discovered the issue in the first place and I have had he issue ever since ever single charge regardless of the outside temp. The up down always took exactly 10 minutes to occur. If i increased the output current to 48 the car would just stop charging.

The dealership replaced the wiring harness with the charge port.
 

azerik

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You obviously have not been paying attention to this thread. I was the one who discovered the issue in the first place and I have had he issue ever since ever single charge regardless of the outside temp. The up down always took exactly 10 minutes to occur. If i increased the output current to 48 the car would just stop charging.

The dealership replaced the wiring harness with the charge port.
You sure about that?
Mine: https://www.macheforum.com/site/threads/l2-38-48-amp-charging-flux.27831/ May 3rd
Another: https://www.macheforum.com/site/threads/my-charging-waveform-has-changed-what’s-up-with-this.28096/ May 15th
Along with several others that didn't have a way to see it in a graph but realized "it takes longer to charge".
Great, your port was replaced and it still does it and if you charge at 48 it just quits. Those of us who could turned it down to 40 or 32amps, still struggling with it. Yours yoyoing at 10 minutes seems to be an edge case.
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