L2 charging speed recently dropped 33%

[generaltso]

I got the dreaded "parking brake malfunction". When they charged out my wiring and fixed that, that's when mine started auto engaging

I've had the parking brake connectors replaced and applied all available updates, and I still don't get the auto-engaging parking brake.

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[kodiakng]

For the first two hours, it maintained 11 kW like normal. Near the end? Well, see the chart above. I may try cleaning the port like Lee suggested, but it never used to do this before. Is it software, or wear and tear? Maybe both?

my guess is it's a combination of at least three things:

1. updated software with lower threshold and tolerance for charge port temperature de-rating
2. higher incident rate than expected in temperature sensor problems/failures
3. charge port wear and tear

it seems we see more reports of problems on older MMEs but enough newer ones to think it's more than just age related wear and tear or a sudden onset of charge port failures.

 

[kennethjk]

I just last an hour at 40 amp and then went to 32 amp. Had to disconnect as leaving but normally just goes up and down

 

[Shayne]

I've had the parking brake connectors replaced and applied all available updates, and I still don't get the auto-engaging parking brake.

I have had the rear park brakes CSP done also as I did not want them to lock on and am on 4.3.6 and the dealer is good to me. Do not think mine engages either as I have rocked it reaching into the frunk. It has a park pin and never really think to much about it. Always seems to be where I left it so far

 

[azerik]

Yesterday I did a 5-hour charge. After about 2 hours, the charge rate started throttling. I left it alone until it reached around 85% and then I disconnected the charge. At the end, it was severely throttled.

The car was parked inside the garage, which was around 82 degrees. Not very hot at all.

I'm sorry for your kW loss.

Remember a few months back when people were mentioning the outside temp being wrong, by about 10 degrees, and the AC needing to be adjust ed from time to time because it just can't seem to hit the same temp without adjusting it? I think someone applied a multiplier to the temp sensors. Not just the port temp sensor but, the inside and outside ac as well as possibly the motor temp sensors. I noticed yesterday my outside temp climbs to 128. It was 104 outside. The longer the car ran the hotter it got even though the car was in the shade and outside while I was washing it. It should have gone down. Not that I blasted the car with water like a regular car wash but the 'outside' temp shouldn't climb 2 degrees a minute while running and driving for 15+ minutes and end up 20 degrees hotter than reality.

 

[kennethjk]

I think this is another version of the HVBJB

Software to correct bad hardware

 

[Mach-Lee]

I'm sorry for your kW loss.

Remember a few months back when people were mentioning the outside temp being wrong, by about 10 degrees, and the AC needing to be adjust ed from time to time because it just can't seem to hit the same temp without adjusting it? I think someone applied a multiplier to the temp sensors. Not just the port temp sensor but, the inside and outside ac as well as possibly the motor temp sensors. I noticed yesterday my outside temp climbs to 128. It was 104 outside. The longer the car ran the hotter it got even though the car was in the shade and outside while I was washing it. It should have gone down. Not that I blasted the car with water like a regular car wash but the 'outside' temp shouldn't climb 2 degrees a minute while running and driving for 15+ minutes and end up 20 degrees hotter than reality.

Not quite, I think the port temp threshold was reduced in the latest powertrain software. So that reveled ports that are marginal and starting to overheat. Just like how the recall software reveled a bunch of marginal failing HVBJBs after it was installed. The software didn't cause the hardware problem, it just revealed it for the first time and is being smarter about managing power to prevent damage from overheating. Having said that, I think they dropped the derate temp limit too much in this round of software, hopefully they increase it somewhat in the next round to improve the situation. Some people with bad overheating problems are still going to need new charge ports though.

If you run the A/C while the car is parked, the front temp sensor gets warm from the heat rejected by the radiator/condenser. If you feel the front of the car, it will be warm.

 

[azerik]

If you run the A/C while the car is parked, the front temp sensor gets warm from the heat rejected by the radiator/condenser. If you feel the front of the car, it will be warm.

Bummer. I thought the sensor would have fresh incoming air.

 

[Shayne]

Not quite, I think the port temp threshold was reduced in the latest powertrain software. So that reveled ports that are marginal and starting to overheat. Just like how the recall software reveled a bunch of marginal failing HVBJBs after it was installed. The software didn't cause the hardware problem, it just revealed it for the first time and is being smarter about managing power to prevent damage from overheating. Having said that, I think they dropped the derate temp limit too much in this round of software, hopefully they increase it somewhat in the next round to improve the situation. Some people with bad overheating problems are still going to need new charge ports though.

So the first fix is a different software version and then possibly hardware if required. Any time line on when that could possibly start happening?

 

[azerik]

I'll go clean me port. Arrrr.

 

[thenew3]

Hi, new to EV's here. Picked up a used 2021 MME Premium ER AWD recently. Also had an Emporia L2 EVSE installed at my house, hardwired to a 60Amp breaker. I've noticed if I look at the emporia app, real time stats show the charge rate at 11kw for 1.5 minutes, then drops to 7kw for 3 minutes then back to 11kw for 1.5 minutes then back down to 7kw for 3 minutes and repeats this cycle until the car reaches the pre-programmed 80% charge level.

Since this is my first EV I'm not sure this is normal or not. I asked the previous owner who has a Grizzle (?) L2 EVSE that he has used with the MME for 2+ years and says it always charges at 9-9.5kwh constantly until reaching that pre-programmed threshold. He doesn't see the fluctuation between high and lower charge rates.

I don't know if something is wrong with the Emporia L2 EVSE, the MME or something else.
The electrician I used does a lot of L2 EVSE installs of many different brands. He seems to know what he is doing and the county inspectors didn't find any issues with the install when they did the inspection.

Do you guys think this is a software issue? MME hw issue? Emporia EVSE issue or something else?

 

[Mach-Lee]

Hi, new to EV's here. Picked up a used 2021 MME Premium ER AWD recently. Also had an Emporia L2 EVSE installed at my house, hardwired to a 60Amp breaker. I've noticed if I look at the emporia app, real time stats show the charge rate at 11kw for 1.5 minutes, then drops to 7kw for 3 minutes then back to 11kw for 1.5 minutes then back down to 7kw for 3 minutes and repeats this cycle until the car reaches the pre-programmed 80% charge level.

Since this is my first EV I'm not sure this is normal or not. I asked the previous owner who has a Grizzle (?) L2 EVSE that he has used with the MME for 2+ years and says it always charges at 9-9.5kwh constantly until reaching that pre-programmed threshold. He doesn't see the fluctuation between high and lower charge rates.

I don't know if something is wrong with the Emporia L2 EVSE, the MME or something else.
The electrician I used does a lot of L2 EVSE installs of many different brands. He seems to know what he is doing and the county inspectors didn't find any issues with the install when they did the inspection.

Do you guys think this is a software issue? MME hw issue? Emporia EVSE issue or something else?

Charge port connection quality issue. You’re charging faster than he was so it will generate more heat in the charge port. Try reducing amps on the EVSE to 40A to match his setting. Ambient temperature and solar radiation is also a factor, perhaps your climate is hotter or you’re charging outside in the sun.

 

[Shayne]

Hi, new to EV's here. Picked up a used 2021 MME Premium ER AWD recently. Also had an Emporia L2 EVSE installed at my house, hardwired to a 60Amp breaker. I've noticed if I look at the emporia app, real time stats show the charge rate at 11kw for 1.5 minutes, then drops to 7kw for 3 minutes then back to 11kw for 1.5 minutes then back down to 7kw for 3 minutes and repeats this cycle until the car reaches the pre-programmed 80% charge level.

Since this is my first EV I'm not sure this is normal or not. I asked the previous owner who has a Grizzle (?) L2 EVSE that he has used with the MME for 2+ years and says it always charges at 9-9.5kwh constantly until reaching that pre-programmed threshold. He doesn't see the fluctuation between high and lower charge rates.

I don't know if something is wrong with the Emporia L2 EVSE, the MME or something else.
The electrician I used does a lot of L2 EVSE installs of many different brands. He seems to know what he is doing and the county inspectors didn't find any issues with the install when they did the inspection.

Do you guys think this is a software issue? MME hw issue? Emporia EVSE issue or something else?

Not normal and a recent phenomena since a recent update to the vehicle. If you read this whole thread you will understand what is going on. Most likely nothing wrong with your charger it is a car.

Charge port connection quality issue. You’re charging faster than he was so it will generate more heat in the charge port. Try reducing amps on the EVSE to 40A to match his setting. Ambient temperature and solar radiation is also a factor, perhaps your climate is hotter or you’re charging outside in the sun.

Not much to do with ambient temperatures and car will do it in cooler temperatures also (50F). Hoping this will not be the fix that Ford will start to push.

 

[thenew3]

Charge port connection quality issue. You’re charging faster than he was so it will generate more heat in the charge port. Try reducing amps on the EVSE to 40A to match his setting. Ambient temperature and solar radiation is also a factor, perhaps your climate is hotter or you’re charging outside in the sun.

His ambient temp were in the 90's to 100's. Mine is in the 60's. He was charging in the sun on his driveway. I was charging in the shade in my garage.
Lowering to 40A gets similar up/down pattern. 1.5 minutes at 9kwh, then 3 minutes at 7kwh and repeats.

Not normal and a recent phenomena since a recent update to the vehicle. If you read this whole thread you will understand what is going on. Most likely nothing wrong with your charger it is a car.


Not much to do with ambient temperatures and car will do it in cooler temperatures also (50F). Hoping this will not be the fix that Ford will start to push.

Thanks, After I posted above, I spent sometime and read through this entire thread and see that many folks are seeing the same issue. Hoping this gets resolved.

 

[azerik]

Not sure how accurate these are but this is the temps after driving and just getting home. A few hours of heat soak in 105+ (not 130+…)

To me all BUT the DC charger coupler temps look off. This was after a 18 mile drive on the freeway at 70, not leaving it running in the driveway.

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