How many have had PCS malfunction/failure?

[JCERRN]

I was going to write the same thing!

Did they do anything different to improve this or did they just swap it out for the same part that may fail again in the near future?

If they didn't do anything different, I'm still concerned for those that had it replaced as well as those that didn't (yet).

So far, it serms they are replacing it with the same part revision. There have been people that report more than one failure

Sponsored

 

[JCERRN]

Incoming news article... 44% of Cybertruck owners experienced PCS failure

To be fair- this is not an accurate statistic. Only 67 people have responded. This is an extraordinarily small number of people compared to the number of owners, let alone forum users.

only Tesla knows the true failure rate of the Power Conversion System Module in the CT

to me, its more the fact that despite such a small sample, around 30 have had failures of that single component. This says to me that this is not isolated to a “fluke”.

The thing that scares me the most is that the condition and mileage thar discovered the failure varies from a few hundred miles to 60K miles +. That means that either its failing in multiple ways, or whatever is failing is doing so inconsistently. This is far from acceptable for a system critical component.

 

[BKCYBerwonkanobee]

To be fair- this is not an accurate statistic. Only 67 people have responded. This is an extraordinarily small number of people compared to the number of owners, let alone forum users.

only Tesla knows the true failure rate of the Power Conversion System Module in the CT

to me, its more the fact that despite such a small sample, around 30 have had failures of that single component. This says to me that this is not isolated to a “fluke”.

The thing that scares me the most is that the condition and mileage thar discovered the failure varies from a few hundred miles to 60K miles +. That means that either its failing in multiple ways, or whatever is failing is doing so inconsistently. This is far from acceptable for a system critical component.

excuse me I'm new to the CT, does this PCS part have anything to do with powering up a house ?
I can't help but wonder if these failures are somehow associated.

 

[JCERRN]

excuse me I'm new to the CT, does this PCS part have anything to do with powering up a house ?
I can't help but wonder if these failures are somehow associated.

The power conversion system module is the unit that converts the 800V battery (the big drive battery) down to 48v for the rest of the vehicle to use (doors, windows, lights, infotainment, power steering) .

It is indeed critical for power share (powering a house) as well as charging

without it, the vehicle can not operate, even with a fully charged battery.

 

[tinGLARE]

Sandy munro's video on the PCS

 

[JCERRN]

Sandy munro's video on the PCS

Its basically a giant power brick.

 

[ChiTownCT]

So basically cant even supercharge if this goes out?

 

[RoboTaxi]

Does thos thing go out when charging at home with high amps?

I charge via 110v and never had an issue. But if it’s going to break I’d rather stress test it now.

 

[Outdoors]

Funny that the PCS was supposed to have redundancy compared to other Tesla PCS's. My PCS has failed or equivalent on my S (twice) and 3(twice) 3is in limp mode don't need faster charging.

If one thinks about it. We charge mostly once a day. Most of us. Tesla really needs to think of those parts a bit better. If they can't convert AC to DC more than a thousand of times before failure. They need a better product. That being said my PCS is still good, yet I had my battery replaced.

I am sure someone coming from ICE will say it is good enough.

 

[Mal]

The power conversion system module is the unit that converts the 800V battery (the big drive battery) down to 48v for the rest of the vehicle to use (doors, windows, lights, infotainment, power steering) .

It is indeed critical for power share (powering a house) as well as charging

without it, the vehicle can not operate, even with a fully charged battery.

Anecdotally, I did get a weird notification from the Tesla app in the middle of the day last week that said something about Powershare unavailable. Then it resolved itself. (There was no power outage in the area, or at my house, so it was out of the blue). I thought we had some sort of power brownout or something and didn't think anything of it.

Now I'm wondering if it was an early warning sign of PCS failure. Interesting.

I will also say that my service center (Fife, WA) usually makes me wait a few weeks to schedule something. This time, when I requested service in the app, they showed available appts starting within 2 days of the request. I wonder if they prioritize PCS issues, knowing the possibility of the truck becoming undriveable.

 

[alpha42]

No warranty, that’s a house power supply problem, not a truck problem. The truck diagnosed his house electrical issue.

Service Alert in his screenshot reads "AMosfetHealthCheckFailed"... I may not be an electrician, but I'm pretty sure houses don't have MOSFETs in their wiring.

 

[TwiztOG43]

Look at it this way, better to get it fixed now, under warranty, then later, out of pocket.

More like get it fixed now under warranty, and later out of pocket. From my understanding there is no updated PCS, so it is just a replacement.

 

[mitch9]

More like get it fixed now under warranty, and later out of pocket. From my understanding there is no updated PCS, so it is just a replacement.

If the Cybertruck was an "ongoing product", they would be re-designing this critical component, not replacing them with the same thing, that keeps failing. Tesla communicates their intentions in multiple ways, not good.

 

[Mal]

No warranty, that’s a house power supply problem, not a truck problem. The truck diagnosed his house electrical issue.

I'm curious - what makes you think it's a house problem? I mean, it could be, but various AI's say the PCS2_a136 error is the truck. And, when it charges (at 24A), it's doing so at 237v, so both legs are hot.

Also in the logs are various "VCLEFT_a*" errors. One of which is "connectorCoverFault" and one of which is "LVBMSEFFuseOvertemperature". Makes me wonder if something rattled loose.

 

[BKCYBerwonkanobee]

The power conversion system module is the unit that converts the 800V battery (the big drive battery) down to 48v for the rest of the vehicle to use (doors, windows, lights, infotainment, power steering) .

It is indeed critical for power share (powering a house) as well as charging

without it, the vehicle can not operate, even with a fully charged battery.

Funny that the PCS was supposed to have redundancy compared to other Tesla PCS's. My PCS has failed or equivalent on my S (twice) and 3(twice) 3is in limp mode don't need faster charging.

If one thinks about it. We charge mostly once a day. Most of us. Tesla really needs to think of those parts a bit better. If they can't convert AC to DC more than a thousand of times before failure. They need a better product. That being said my PCS is still good, yet I had my battery replaced.

I am sure someone coming from ICE will say it is good enough.

No not really, I'm new from ICE as of this past March started with the Y and 7 days in with my new Beast and everything I've read from Tesla says to keep the vehicle plugged in when not in use.
So if the module is not standing up to the amperage load to and from the source (supplying to the house) then there is an issue especially when Sandy claims the motors alone should last upwards of 750K miles. So failure at 30-60K miles is not acceptable IMHO.

Sponsored