Mp3 stuck at 16 amp charging after using public charger

[Tom85]

So I've been using my home OHME pro home charger for 6 months and it's been working fine. I used a public charger for the first time while on holiday ( non Tesla ) since I've come home it does charge over 16 amps. I've restarted the charger , hard reset the charger via the fuse box.

This makes me think it's the car and the public charger somehow set this beha

vior off .

I don't have access to anyone with a EV to test my charger so I was thinking if I use a public charger would it work the same as my Ohme and therefore if it's stuck at 16 amps it's the car that's the issue ?

Btw 2019 mp3 70k millage.

 

[Billbrown1982]

It would have to be pretty bad to affect the charging I imagine but have you checked for any crap in the charge port that may have been on the public charger?

Long shot but all I can think of

 

[LoudMusic]

Have you tried another charger?

Also I think most people call your model M3P. MP3 is something else

 

[Tom85]

Have you tried another charger?

Also I think most people call your model M3P. MP3 is something else

Haha that's auto correct for you I haven't tried another charger , that was my question if I use another public charger is it treated the same way as a 32amp home charger

 

[LoudMusic]

That very much depends on the charger itself. It very well may be less than 16A. But at least you'd have another data point in trying to solve this.

Have you opened a ticket with Tesla support?

 

[init6]

Have you checked that the car setting for charge current hasn't been altered?

 

[MrBadger]

Have you checked that the car setting for charge current hasn't been altered?

Looks from the screen shot, as car is plugged in, that charge point is only offering max 16A.

This is communicated from the charge point to the car using the pilot pin.

If car is not plugged in then I believe it will show max 16A.

Also worth stating that charge current is location aware, so if you plug in to a charge point at a different location then it will automatically select a different charge rate. But this should not affect max charge rate offering.

Finally, some software versions have broken charge rate, but it’s been a long time since I have heard of anyone mentioning that. But if you are on some oddball software version…

 

[init6]

Thanks couldn't remember if the second figure was the max the charger output or that was the one that could be varied. Car not near me so I couldn't check.

 

[Tom85]

That very much depends on the charger itself. It very well may be less than 16A. But at least you'd have another data point in trying to solve this.

Have you opened a ticket with Tesla support?

Not yet , id like to work out if it's the car or charger before I start spending money. It just seems odd that after a public charger its caused an issue

 

[Billbrown1982]

Not yet , id like to work out if it's the car or charger before I start spending money. It just seems odd that after a public charger its caused an issue

Opening a ticket is free and always possible some kind of software fix will clear it.

 

[navguy12]

So I've been using my home OHME pro home charger for 6 months and it's been working fine. I used a public charger for the first time while on holiday ( non Tesla ) since I've come home it does charge over 16 amps. I've restarted the charger , hard reset the charger via the fuse box.

This makes me think it's the car and the public charger somehow set this behaView attachment 1044760vior off .

I don't have access to anyone with a EV to test my charger so I was thinking if I use a public charger would it work the same as my Ohme and therefore if it's stuck at 16 amps it's the car that's the issue ?

Btw 2019 mp3 70k millage.

Seeing the age of your car, you may want to investigate the onboard “power conversion system” (PCS).

It’s a line replaceable unit (LRU), that is electrically setup into three 16 amp thirds; if one or two sections of that LRU fail, one can see their normal 48 amp charging capacity drop to 32 amps or 16 amps.

When my PCS acted up, I thought it was my home wall connector.

Much troubleshooting had to happen before I could convince Tesla there was an issue with the car and not my home connector.

Apparently this LRU was improved sometime in 2019.

Some background for context:

My TM3 throttled home charging from 48 amps to 32 amps

www.teslaownersonline.com

 

[thewishy]

Onboard charger fault is a good call. I don't know if the service menu might warn for that. You'd have to have 2 of the 3 modules fail for 16a max

I think your best next step is to try against another charger (Neighbour? Friend?) and see if you're capped to 16a on that as well. Unfortunately you won't be able to test using the granny charger as that won't push enough power from a 13a plug.

 

[Jason71]

Onboard charger fault is a good call. I don't know if the service menu might warn for that. You'd have to have 2 of the 3 modules fail for 16a max

I think your best next step is to try against another charger (Neighbour? Friend?) and see if you're capped to 16a on that as well. Unfortunately you won't be able to test using the granny charger as that won't push enough power from a 13a plug.

and or get someone local to plug into your charger and confirm they are seeing 32amps....

I assume your home charger is tethered? i.e. you weren't using the same cable on the public charger and home so we can rule that out as not a common factor?

 

[Tom85]

So to update this , I tried a couple of public chargers but they were 22kw 16amp so I can't be 100% sure however Ohme which is my home charger manufacturer have said there has been a firmware upgrade causing this issue. I'm guessing when the car is plugged in it doesn't upgrade the firmware and as I was away on holiday it had time to upgrade.