HV-BATT_a174 - Unable to charge Disconnect and retry

[CybertruckDoc]

I have the same problem as you did. Both my universal wall connector, and the mobile connector will not work. I am scheduled to see the service center on 5/1/25.

I got the same issues this week too. Kinda weird. Only charges at superchargers. New update today didn't change anything either.

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[JayWebbMD]

I had the same issue start last friday and assumed it was my home charger. Went back and forth with service through email and eventually figured out it was the truck unable to accept AC charging. So is that 4 of us that had the same problem start in the same week? Unfortunately, my crappy local service center’s first available appointment is May 27! Was it a simple fix at the charging outlet or something that a skilled DIY’er could handle?

 

[65SoYoLO]

that is more then a coincidence...

 

[Alto]

I have the same problem as you did. Both my universal wall connector, and the mobile connector will not work. I am scheduled to see the service center on 5/1/25.

Same recently happened to me. I messaged service in the Tesla app, the next day the error messages were gone. The problem repeated itself once, but now appears to be gone, without physically visiting service.

I’m suspicious of an issue on update 25.8.7 we know there are often problems with the software updates pushed to early access user, because “Not a Tesla App” notes many of the updates are bug fixes. I think Tesla is not sufficiently transparent and not publishing any information on the bug fixes.. I think knowing what was wrong would be helpful.

 

[bigbangbadaboom]

Pretty annoying but it looks like its gone for me now suddenly. No update or anything. Supercharged 3x's and it usually happens when I'm near the 80% mark but now it seems like its fixed. Annoyed because my 3 other teslas never have this many issues lol

 

[Big500]

I have the same problem as you did. Both my universal wall connector, and the mobile connector will not work. I am scheduled to see the service center on 5/1/25.

Well I got my unit back two days after dropping it off and it works. They replaced the Power Conversion System, but they still had an error and it would not charge. They ended up also replacing the AC junction box and High voltage harness which seemed to fix everything. It has been working since Friday night when I picked it up. I have attached the invoice showing everything even though it was covered under warranty. I have about 2,400 miles on the truck.

 

[JayWebbMD]

I had the same issue start last friday and assumed it was my home charger. Went back and forth with service through email and eventually figured out it was the truck unable to accept AC charging. So is that 4 of us that had the same problem start in the same week? Unfortunately, my crappy local service center’s first available appointment is May 27! Was it a simple fix at the charging outlet or something that a skilled DIY’er could handle?

Just to add some followup. It took 3 days for service, but I also had them do the wiper motor, sail panels, and a few more things. They said the problem was “an overcurrent event” which blew a fuse and caused the power conversion module to fail. I’m not sure why there’s a fuse if it doesn’t protect the module, but they said they had to replace the entire PCM and the harness going to it.

I asked if they have any idea if it was use-related or what could have caused it and they said it wasn’t use-related, but they don’t otherwise know why it would have happened.

For general information, when this happened, it did not effect my outlets, my ability to supercharge, the power to the motors, etc. I guess I just cross my fingers and hope it doesn’t happen after the warranty runs out…I’m sure that’s not a cheap fix.

 

[mongo]

Just to add some followup. It took 3 days for service, but I also had them do the wiper motor, sail panels, and a few more things. They said the problem was “an overcurrent event” which blew a fuse and caused the power conversion module to fail. I’m not sure why there’s a fuse if it doesn’t protect the module, but they said they had to replace the entire PCM and the harness going to it.

I asked if they have any idea if it was use-related or what could have caused it and they said it wasn’t use-related, but they don’t otherwise know why it would have happened.

For general information, when this happened, it did not effect my outlets, my ability to supercharge, the power to the motors, etc. I guess I just cross my fingers and hope it doesn’t happen after the warranty runs out…I’m sure that’s not a cheap fix.

They may have reversed the order of events. A PCS fault could cause overcurrent which then blew the fuse.

Also, electronics can get damaged in less time than it takes a fuse to melt. The fuse prevents long duration overcurrent which will damage other parts and possibly lead to thermal events.

 

[mmdotking]

Just to add some followup. It took 3 days for service, but I also had them do the wiper motor, sail panels, and a few more things. They said the problem was “an overcurrent event” which blew a fuse and caused the power conversion module to fail. I’m not sure why there’s a fuse if it doesn’t protect the module, but they said they had to replace the entire PCM and the harness going to it.

I asked if they have any idea if it was use-related or what could have caused it and they said it wasn’t use-related, but they don’t otherwise know why it would have happened.

For general information, when this happened, it did not effect my outlets, my ability to supercharge, the power to the motors, etc. I guess I just cross my fingers and hope it doesn’t happen after the warranty runs out…I’m sure that’s not a cheap fix.

I’m now getting same errors. Guess I’ll schedule service. Thought it was my wall charger but when I also tried mobile connector and rebooting truck a couple times, just never resolved.

 

[mmdotking]

I’m now getting same errors. Guess I’ll schedule service. Thought it was my wall charger but when I also tried mobile connector and rebooting truck a couple times, just never resolved.

And service was open at 8am today, just took a shot, they were nice and got me right in even tho appt was for July 10. Just said if they could quickly reproduce right then on site, they'd get me in today. They did for both. Referenced this threads notes/errors/replacement notes, thanks all.

 

[mmdotking]

Got a response from service. "While diagnosis is ongoing, the technician has documented some thermal damage to HV components called the Device Cluster and a wiring harness assembly. I will be sure to relay any updates as soon as they're available, but we appear to be on track to complete service on Tuesday.”

 

[CyberTex]

Got a response from service. "While diagnosis is ongoing, the technician has documented some thermal damage to HV components called the Device Cluster and a wiring harness assembly. I will be sure to relay any updates as soon as they're available, but we appear to be on track to complete service on Tuesday.”

@mmdotking How did this turn out for you?

I'm now going through the same thing after 20K miles and over a year with no issues. May 2024 Cyberbeast. Wouldn't charge from wall connector or mobile charger but was able to Supercharge. Onboard AC outlets were fine.

Service Center says fuse, device cluster assembly, AC junction box, power conversion system and possibly harness device cluster needs to be replaced. 16 hours of shop time.

 

[mmdotking]

@mmdotking How did this turn out for you?

I'm now going through the same thing after 20K miles and over a year with no issues. May 2024 Cyberbeast. Wouldn't charge from wall connector or mobile charger but was able to Supercharge. Onboard AC outlets were fine.

Service Center says fuse, device cluster assembly, AC junction box, power conversion system and possibly harness device cluster needs to be replaced. 16 hours of shop time.

Yep, replaced HV harness/junction box, ancillary cluster/harness. Everything working well now.

 

[Haoooc]

I had the same issue in late April, and service center replaced almost everything in the ancillary device cluster, PCS, HV harness, AC junction box, etc, but the exact same issue happed again yesterday. Service centers are all booked for 1-2 weeks but I will take another shot tomorrow morning since using supercharger is really inconvenient and costly.

 

[mmdotking]

I had the same issue in late April, and service center replaced almost everything in the ancillary device cluster, PCS, HV harness, AC junction box, etc, but the exact same issue happed again yesterday. Service centers are all booked for 1-2 weeks but I will take another shot tomorrow morning since using supercharger is really inconvenient and costly.

Dang, that is frustrating. Sure hope mine doesn't come back. My 2021 Model 3 was soooo reliable, I want to trust this truck cuz I love it. Will be curious what yours comes back with on 2nd fix.

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