Unable to charge..disconnect cable and retry...then goes away

[Hookemhorns]

2016 MS. When charging at home lately, when I plug in the UMC cable the dash pops up with a warning "Unable to charge. Disconnect Cable and Retry"

If I wait about 3 seconds, the warning goes away, and charging completes with no further issues. This has been going on for a couple of months now. I have tried blowing out the port and cable with compressed air.

Any suggestions/comments?

 

[aerodyne]

With the car off, and the MC disconnected, use a dry "Q"tip or equal to clean the contacts.

I found a surprising amount of dirt on a one year old MC, strapped to my garage ceiling, never moved.

 

[cookie99]

2016 MS. When charging at home lately, when I plug in the UMC cable the dash pops up with a warning "Unable to charge. Disconnect Cable and Retry"

If I wait about 3 seconds, the warning goes away, and charging completes with no further issues. This has been going on for a couple of months now. I have tried blowing out the port and cable with compressed air.

Any suggestions/comments?

I have this issue too! I also have another somewhat related issue, a few times (very rare) my charger will stop charging and require me to plug and unplug to continue. could be annoying if its at a public lvl2 charger which requires me to physically go back to the car, or when its in the middle of the night -_-

 

[Babaron]

My MS100D 2019 has exact same warning issue every single time I plug in at home. It goes away after a few seconds and I never really thought much of it.

 

[TMeister]

This can be caused by a delay in the EVSE coming on-line when plugged into the car. The car expects it faster than it happens. Listen for the relay in the EVSE to close quickly or not. My open EVSE box goes into a "must reboot" state after a long time idle. When I plug it into the car in that state the re-boot of the EVSE causes the car to complain just as described but then it picks up from there as soon as the relay closes.

 

[aerodyne]

If this is true, perhaps it is covered under the MC or WC warranty?

 

[Hookemhorns]

TMeister - good hins. But my relay is closing almost immediately; they about 2 seconds later the error message pops up for about 2-3 seconds, then all seems well.

 

[Hookemhorns]

hins —> hint

 

[JzCastle]

This a software bug and has been on-going for about 2-3 months.

I have it myself and while I had another appointment, this was diagnosed at Tesla SC. Unfortunately it is (just) a bit annoying and still happening for me. There is a discussion about it here at TMC and quite many people have the same "problem" - although despite of the message there is nothing more to it.

"This is a firmware related issue and will be fixed in future firmware updates."

 

[jebs2k]

i had this also (20 raven) and was told it is a software bug.
indeed it went away when i upgraded to 2020.8