NEW PCS (Power Conversion System) Failure & Replacement News

[Jhodgesatmb]

I am trying to follow this issue. My AWD Founders CT was delivered April 12, 2024 with a 3735 VIN. It sounds like it was in the heart of this issue. I see a voluntary recall on Inverter parts, which my truck does not show up on the VIN lookup. I asked about the PCS and the Inverter on my last service appointment and they said there were no issues for my specific CT. I had a couple of Failure not restart and charge notifications early morning while the CT was sitting charged. They indicated that I was going through firmware update during the logged notice and that was likely the issue.

I do not have charging limit issues at home nor on the road where I see as high as 250+. What should I ask about next time to avoid any future issues. I am currently at 21,000 miles.

Mine was May 2024 and I got the messages in February of this year (I think). Mine failed around 30K miles. I doubt there is anything you can ask since it is not a recall. It would have to fail but you have a lot of time on warranty still.

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[rcoleblack]

I had mine fail about 2 months ago at 40K Miles. Vin 1400 Feb 2024 build. Truck was acting really weird for over a month before this though. It would never deep sleep and would keep pack contactors closed. I would loose 10-15% per 24h of just sitting in my garage everything off. Really began to piss me off. Put in a service appointment for that and then 2 days before the appointment the truck was totally dead in my garage. My PCS failure was so bad I lost all 48v too. Had to drag it out as we lost steering and ability to shift and stay in neutral. The jump pack I had and that tow truck driver had both weren't strong enough to keep truck awake and steerable.

This is why PCS should definitely be covered under drive train and should be a NHTSA recall because when it fails, you loose 48v and can't even f*cking steer the thing.

 

[Jhodgesatmb]

I guess it would depend how the PCS unit fails as it’s not the unit that handles the DC supercharging, I THINK.

Mine failed on L2 charging so we took it to an SC because that is what Tesla recommended and the battery had 60% SOC. Unfortunately, it wouldn’t DC charge (we tried several stalls where others were charging fine). The color on the port appeared as purple so I thought the car was trying to use our charging schedule but that never happens at an SC. So somehow the events were linked. Maybe the PCS failure put the charging into a mode where it was still trying to L2 charge … I don’t know but I got anxious because we were not close to home.

 

[Jhodgesatmb]

Like I said before, mine somehow got stuck thinking I was trying to do L2 charging even when I was at an SC and refused to charge.

 

[Leifmb]

Mine failed on L2 charging so we took it to an SC because that is what Tesla recommended and the battery had 60% SOC. Unfortunately, it wouldn’t DC charge (we tried several stalls where others were charging fine). The color on the port appeared as purple so I thought the car was trying to use our charging schedule but that never happens at an SC. So somehow the events were linked. Maybe the PCS failure put the charging into a mode where it was still trying to L2 charge … I don’t know but I got anxious because we were not close to home.

Well, it’s all in that same area in the rear part of the battery hump! I hope you were able to get home!

 

[ChiTownCT]

I also use the Naperville or Lisle Tesla Service Center. I have an FS CB with 7k miles 2024. Will they replace this board if it has not failed yet, since they have updated the part?

No they wont, I tried that a couple months back.. Not sure about the other SC's around Chicago but Naperville sure won't..

 

[Jhodgesatmb]

Well, it’s all in that same area in the rear part of the battery hump! I hope you were able to get home!

We got home but I needed all of the charge to get home and back to the service center to have the PCS replaced. It all worked out because, despite living 45 minutes from the service center, at least all of this happened in an urban area. Had we been on any kind of road trip we’d have been screwed.

 

[Djcoolchris]

I just got mine home from being replaced. This is actually my second truck that’s had the PCS replaced. When I got him I notice an unusual new “electrical humming” sound. Is this normal with the new PCS? (48amps/240V)

 

[Leifmb]

I just got mine home from being replaced. This is actually my second truck that’s had the PCS replaced. When I got him I notice an unusual new “electrical humming” sound. Is this normal with the new PCS? (48amps/240V)

I didn’t notice and different sounds.

 

[Leifmb]

I didn’t notice and different sounds.

Well, my LOANER was an AWD which had quieter drivetrain (motors) than the Tri-motor!

 

[btcrealm]

I think most of us know we bought a Beta Test Unit (FOUNDATION) and understood there will be problems but we also expect Tesla to take care of the problems that come up. That is not unreasonable.

I don't think it is specifically age, powershare, supercharging rate, or plugged in rate that is causing this. I have a cyberbeast and this went out on me several weeks ago. I have a friend who got his 3 months before me and has not had the issue yet.
We both have driven over 40k miles. We both have powershare connected. We both have been on long trips across much of the country.

One would think that his being a June 24 and mine being an August 24 (received times) that his would have shown the issue by now but it still has not.

When mine was replaced there were 4 components they replaced (see the other thread with my screenshot of my invoice of that section). Mine would not charge at all. I live 2+ hours from a service center and mine had to be towed with 50% charge because I couldn't get it there without charging along the way.
Those that live in cities near service centers thats great but there are many of us that do not.

 

[CyberGus]

Keep in mind that the two power pins on the NACS carry either AC or DC current. There is no mechanical disconnect, so the AC and DC pathways are always conjoined.

 

[NSCyber]

Silly question but for those that are parked in a garage is it an absolute pain moving/towing the cybertruck with a pcs failure or is it the same as any other dead car? Thankfully I’m on the ground floor. Scared of the thought of having to get it moved down a steep ramp!!

 

[btcrealm]

Silly question but for those that are parked in a garage is it an absolute pain moving/towing the cybertruck with a pcs failure or is it the same as any other dead car? Thankfully I’m on the ground floor. Scared of the thought of having to get it moved down a steep ramp!!

You have to be able to get it into neutral so if it is completely dead that will be a pain but other wise just neutral and pull it out of the garage.
Its not that you can't drive it, you just can't charge it so don't let the battery go dead in your garage.

 

[Jhodgesatmb]

I didn’t notice and different sounds.

Nor me.

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