L2 charging speed recently dropped 33%

[thenew3]

Thanks, that's the same firmware I have, yet I still have the ping pong charge curve.

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[tuminatr]

Thanks, that's the same firmware I have, yet I still have the ping pong charge curve.

The firmware in my car has been updated. Mach Lee came over and did the update. In my case that & a new charger has solved the problem but for some the issues could be different.

One other thought this issue was also a misunderstanding on my part. I figured the charger (EVSE) was providing 9.6kw so that's what I should see in the app. At 40a Ford pass rounds down to 8kw even though my car is seeing 8.96kw according to a OBD2 scanner so some of the issues may be Ford pass related.

 

[Shayne]

You realize the charge rate is going to decrease as you approach 100% right? You're at 98% so 4 kW seems right to me. Set your limit to 90% instead. Charging to 100% takes an extra hour or two because of the taper.

Well of course? You realize that my car charges like a POS right? At my place and reproduced at my dealers.

ICYMI (it's a long thread, and I posted this a long time ago). My slow L2 charge issue was caused by a faulty onboard charger. This affects the L2 charging only, and for my car, only above 32 Amps. This means most Tesla destination chargers did not work. It was a herculean effort to get this taken care of. The issue could only be seen on my EVSE, and my dealer did not have a way to charge the car above 32 Amps, except by using my equipment. Ford engineering got involved, and it took a while to get resolved.

But it did get resolved. My onboard charger was replaced, and the car now L2 charges at up to 50 Amps, as it should. The key was communicating with the dealer, and providing OBDII plots, and loaning them my EVSE.

Slow DCFC charging is completely separate. At no time was my car affected by that. DCFC does NOT use the car's onboard charger. If you are getting slow charge rates below 80%, try using a Tesla SC instead.

You lucky soul Ford has decide to ignore and sh!t on some.

 

[mjmcnns]

Are there any recent known causes/resolutions to this? Our Mach-E has undergone a similar drop in L2 charging at our home recently. Down to 3-4kw charge rate.

 

[azerik]

The firmware in my car has been updated. Mach Lee came over and did the update. In my case that & a new charger has solved the problem but for some the issues could be different.

One other thought this issue was also a misunderstanding on my part. I figured the charger (EVSE) was providing 9.6kw so that's what I should see in the app. At 40a Ford pass rounds down to 8kw even though my car is seeing 8.96kw according to a OBD2 scanner so some of the issues may be Ford pass related.

Actually this reminds me that i havn't tried setting my car above 32amps since I FDRS'd it. I'll have to run the gauntlet and see if it can handle 40+ amps and not yoyo. Before FDRS (whatever the dealer did) it would start high and within g30 ~40 min drop down from 48 to about 40and an house later drop to about 36. Granted my fan and pump was doing whatever it felt like at that time and hardly making a sound. Now my vents open and it runs the fan for a while off and on. My garage is an avg of 104 almost all day and 115 at night wile charging so I'm sure some thermal throttling will happen. I'm also on 599 (and have been for a very long time) on my Emporia.

 

[azerik]

Can’t say the latest software in the car resolves this either.

Reading left to right, 32amp > stopped and started charging again at 48amps, then it dropped and yoyo’d. And even went down to 3kw annd started again. That second dip wasn’t me at 10:52. Only been 18+ months, I hear the fix is soon.

 

[Mach-Lee]

Are there any recent known causes/resolutions to this? Our Mach-E has undergone a similar drop in L2 charging at our home recently. Down to 3-4kw charge rate.

There are a multiple of causes that have to be worked through. Each case may be different.

• Faulty EVSE (the Ford Mobile Charger is notorious for derating)
• Bent/dirty pins in the charge port
• Melted pin sockets
• Loose/worn J1772 pin sockets in the handle
• Loose crimps on the back side of the J1772 pin sockets or charge port pins
• Bad electrical connection anywhere upstream of the car (inside the EVSE, wall plug or outlet, junction box, circuit breaker, panel, etc)
• Low/high line voltage or bad power quality (e.g. not close to 208/240V 60 Hz)
• Outdated charger software
• Faulty charge port thermistor (temperature sensor)
• Problem with on-board charger electronics
• Problem with motor electronics cooling system (such as bad pump or low coolant)
• Faulty S3 latch switch circuit in the J1772 handle that causes intermittent contact
• Excessive ambient temperatures above 104ºF
• Issue with the charge port lock mechanism (which also prevents DC charging)
• Other powertrain/high voltage issues "Service vehicle soon" that cause a global power limit

In summary, sometimes it a problem with the charging equipment or power, and sometimes it's a problem with the car. And sometimes it's just because it's too hot outside. The charge rate is limited so the charge port does not melt, or when a bad connection is detected.

 

[Shayne]

Can’t say the latest software in the car resolves this either.

Reading left to right, 32amp > stopped and started charging again at 48amps, then it dropped and yoyo’d. And even went down to 3kw annd started again. That second dip wasn’t me at 10:52. Only been 18+ months, I hear the fix is soon.

Yep definitely you got zap with ford limp charging software to stop melting and burnt smells of the charging port. Could be a lot of things but it is not. It is exactly like Fords limp mode before your HVJB blows it is limp charging so your port does not melt. Yours is a whole lot better than what Ford installed and left me with. Mine averages 32 amps and no better.

This BS about sloppy pins and heat is just plain disinformation to what is actually going on here. Appears my dealer and me have bad chargers and the car can do no wrong. Fan boys will deflect until they die. Definitively it is the software that was installed on the car (Transfer Function) that is the problem. If it was something else Ford would say so but they know it is the car as they installed it and know what they did.

 

[yazoo888]

After reading this thread, I guess I have the WORST L2 charging rate possibly. Fellow Mach E drivers, please help to check this out for me --

I have a 2021 Select since August 2022 , currently, it is a bit over 33K miles. In my garage, electrician wired 240V socket for me； the charger I am using the is the original FORD charger that came with the car.

For the last 2 years (Aug. 2022-2024), on my Ford Pass App, I have seen max 6-7 kW charging rate, never seen higher than that. Most of time during charging time (set to 9pm-8am typically, because of the rate plan). Most of the times, I have seen mostly 3 kW charging rate, NOT even 6 kW. The indicator lights some times (maybe often times -- since I did not pay attention to it) goes to Yellow. Thoughts and suggestion?

 

[Mach-Lee]

After reading this thread, I guess I have the WORST L2 charging rate possibly. Fellow Mach E drivers, please help to check this out for me --

I have a 2021 Select since August 2022 , currently, it is a bit over 33K miles. In my garage, electrician wired 240V socket for me； the charger I am using the is the original FORD charger that came with the car.

For the last 2 years (Aug. 2022-2024), on my Ford Pass App, I have seen max 6-7 kW charging rate, never seen higher than that. Most of time during charging time (set to 9pm-8am typically, because of the rate plan). Most of the times, I have seen mostly 3 kW charging rate, NOT even 6 kW. The indicator lights some times (maybe often times -- since I did not pay attention to it) goes to Yellow. Thoughts and suggestion?

Frequent yellow light on the Ford Mobile Charger means it's gone bad. VERY common problem with that unit and tons of topics about it (search). So I would say your problem is most likely caused by the mobile charger and replacing it will probably fix it.

 

[Neil4Real]

Frequent yellow light on the Ford Mobile Charger means it's gone bad. VERY common problem with that unit and tons of topics about it (search). So I would say your problem is most likely caused by the mobile charger and replacing it will probably fix it.

Do you think they updated it at all when they issued that TSB or whatever for it? Or still the same one prone to failure?

 

[4sallypat]

Emporia consistently has been delivering full 11kW (48A) for 2 years (Lightning and Mach E).

Have not seen any drop.

Charge curve below - shows tapering off over 90%:

 

[Mach-Lee]

Do you think they updated it at all when they issued that TSB or whatever for it? Or still the same one prone to failure?

You're talking about the Ford Mobile Charger? I think Webasto maybe had a bad batch or made a revision, all the issues seem to be reported by 2021 and 2022 owners, not really any I'm aware of from a 2023+ vehicle.

 

[Shayne]

So this is where I am at this stage of trying to get this fixed. The dealer has now reproduced it and acknowledged it.

Here is the final invoice at first they wanted to say all was good and at the end this is what I got.

And here is the charging event at their service garage.

Any suggestions what my next step is in getting this fixed would be appreciated.

 

[Murse-In-Airy]

I’ve totally given up on this whole thing. My wife doesn’t drive that far. Sure it’s a pain in the ass that it won’t charge at full speed and if we set it to 90% we may only get 78% by morning. But that’s only when we plug in at a real low SOC, which is rare for her.

So while I’m not happy with the situation, it also isn’t worth the angst I was allowing it to cause.

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