My turn for Critical Error, week 2

[Sjohnson20]

There‘s lemons in every batch of cars even model ys had the drive motors fail brand new. They will fix it. It is annoying.

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[Carlos Thomas]

The Error seems to be redundancy sensors. That sounds to me like it's the front SbW steering.

If so this "Critical Warning" is obviously a new one for Teslas, in that no other Tesla's have SbW.

Can you enter the Service mode and maybe find out the exact error code and explanation of that?

I'm sort of hoping it's the same across all of them, so it has a common cause that can be fixed with a recall. If they are different, it might be a wider issue.

I am on the road and won’t have access to my Cybertruck until Friday. So I can’t check this. Maybe someone else can check on their Cybertruck.

There were about 20 different errors from the Rear Steering, High Voltage System, Powertrain, Adaptive Ride Height, Unable to Charge, etc. Something happened and everything else was like a domino effect.

When I went to pull over and then move forward slightly to get to a safer location, the vehicle shuttered someone violently. The hazards would not work and you could change gears. Only park was available.

Like I said, if this is all software, the good thing is if they can replicate it they should be able to fix it. But on the other hand, if it is actually software related, all 1500 Cybertrucks in the road have exposure/risk in it happening to them. It is just a matter of time, which does not inspire confidence.

I am glad the original poster was able to get his car in and looked at today. I have to wait until Monday, March 4th, which doesn’t make me happy.

 

[Jhodgesatmb]

The Error seems to be redundancy sensors. That sounds to me like it's the front SbW steering.

If so this "Critical Warning" is obviously a new one for Teslas, in that no other Tesla's have SbW. The question is, is it a false positive (code bug, momentary comms or sensor) or an actual failure of one of those, and is the "Critical Warning" intentionally overly sensitive to these events to make sure nobody gets hurt because of them?

From memory, there are three redundancy sensor and comms systems on the SbW, but only two mechanical actuation redundancies. So this could be a 1 in 5, or a 5 out of 5 system failure.

Can you enter the Service mode and maybe find out the exact error code and explanation of that?

I'm sort of hoping it's the same across all of them, so it has a common cause that can be fixed with a recall. If they are different, it might be a wider issue.

I hope that critical errors like this get fixed before I get my Cybertruck. Some things I can live with but others no one wants to have happen to them and critical errors are way up on the list - things that put our families at risk are unacceptable.

 

[JBee]

There were also errors about the low voltage system, sorry don’t have the vehicle so can’t provide more info yet.

That is potentially a non-steering equipment related failure then.

From memory there is also at least two power supply redundancies as well. You might just have a flat 48V battery, or a faulty 48V power supply. Either would throw a critical failure, as I would assume for normal driving, all redundancies need to be working, including the power supplies. That 48V battery always looked undersized to me with just 250Wh or so with all the 48V loads on it. It's the equivalent energy of just 2.5x 4680 cells, that would cost just a few dollars.

Did anything 48V powered or electrical also not work?

 

[JBee]

I am on the road and won’t have access to my Cybertruck until Friday. So I can’t check this. Maybe someone else can check on their Cybertruck.

There were about 20 different errors from the Rear Steering, High Voltage System, Powertrain, Adaptive Ride Height, Unable to Charge, etc. Something happened and everything else was like a domino effect.

When I went to pull over and then move forward slightly to get to a safer location, the vehicle shuttered someone violently. The hazards would not work and you could change gears. Only park was available.

Like I said, if this is all software, the good thing is if they can replicate it they should be able to fix it. But on the other hand, if it is actually software related, all 1500 Cybertrucks in the road have exposure/risk in it happening to them. It is just a matter of time, which does not inspire confidence.

I am glad the original poster was able to get his car in and looked at today. I have to wait until Monday, March 4th, which doesn’t make me happy.

Whoops missed this post.

Seems like yours is an electrical fault on the 48V side as described in my above post.

There is a very slim chance that this is software related, as they normally don't need to update and reprogram MCUs that handle powrr conversion routines. This is all done in bench testing in the lab way before the design makes it to production and into a car. Power supply stuff is not that complicated that it would even benefit from a OTA.

I think the 48V battery might be the weakest link here, so maybe that didn't charge properly etc. Also from what I understand the 48V also runs all the controller nodes, so if that goes down everything will. It not being able to isolate circuits and avoid a cascading failure, is a big no no for critical systems. It should most definitely not have a driveline shudder in that state. I'm glad you could pull over safely.

Was the steering heavy or erratic, or the same as usual? Both steering and brakes should be last to go, good job it hasn't got BbW as well.

 

[cyber_danko]

It appeared on Saturday morning. It would only allow driving at 4mph or below; it barely made it up the ramp onto the tow truck. They are only looking at it this morning (Monday), with and estimated completion for end of day. We will see!

Thanks OP. Crossing my fingers this is a simple fix. Sorry this happened to you. Let us know how it goes.

 

[Carlos Thomas]

Whoops missed this post.

Seems like yours is an electrical fault on the 48V side as described in my above post.

There is a very slim chance that this is software related, as they normally don't need to update and reprogram MCUs that handle powrr conversion routines. This is all done in bench testing in the lab way before the design makes it to production and into a car. Power supply stuff is not that complicated that it would even benefit from a OTA.

I think the 48V battery might be the weakest link here, so maybe that didn't charge properly etc. Also from what I understand the 48V also runs all the controller nodes, so if that goes down everything will. It not being able to isolate circuits and avoid a cascading failure, is a big no no for critical systems. It should most definitely not have a driveline shudder in that state. I'm glad you could pull over safely.

Was the steering heavy or erratic, or the same as usual? Both steering and brakes should be last to go, good job it hasn't got BbW as well.

The steering was slightly heavier and the brakes were softer, similar to a ICE when there is some sort of failure. I expected the steering to feel different because it was now just two wheels. But I was not expecting the softness in the brakes. Almost like brake fade when brakes get too hot.

That is the best way I can describe the feeling while it was happening. Being that it happened 3 different times, I got a good feeling of it.

The part that throws me was that it said to exit the vehicle to let it reset and it potentially work again, which I did and the truck worked again. Then shortly after (5 minutes later) it happened again. So now it is parked until I can get it serviced. Hoping the OP gets it figured out first.

 

[Cyberns]

Was the steering heavy or erratic, or the same as usual? Both steering and brakes should be last to go, good job it hasn't got BbW as well.

It was DOA in the morning in the garage after working fine the night before. My impression is the 48V system runs everything so yah, the doors, displays, etc. all worked. I’m guessing the steering may require the highest available voltage of all the subsystems (in my airplane there is a carefully designed hierarchical order in which systems shut down as voltage drops, I assume the car design is similar), so yah it could be a symptom of the 48V system failing.

 

[Carlos Thomas]

My guess nobody at Tesla knows about this OR they did know about it and released the Cybertruck anyways.

Remember seeing photos of some Cybertrucks sitting roadside awaiting a tow a few months back…I bet Tesla knows about this problem…and they don’t know how to fix it. That is when it becomes a scary proposition.

My question who is next or who as it happened to that is not posting on the forums?

I am not sure if Tesla has a person monitoring the forums as we beta test the Cybertruck. The is a computer on wheels, they should already know about this problem. Interesting, I have received no message from my service advisor saying, “Hey I saw these critical error codes…can you bring your truck in today so we can look at it?”

This will be interesting to see how this unfolds.

 

[Speedr]

My guess nobody at Tesla knows about this OR they did know about it and released the Cybertruck anyways.

Remember seeing photos of some Cybertrucks sitting roadside awaiting a tow a few months back…I bet Tesla knows about this problem…and they don’t know how to fix it. That is when it becomes a scary proposition.

My question who is next or who as it happened to that is not posting on the forums?

I am not sure if Tesla has a person monitoring the forums as we beta test the Cybertruck. The is a computer on wheels, they should already know about this problem. Interesting, I have received no message from my service advisor saying, “Hey I saw these critical error codes…can you bring your truck in today so we can look at it?”

This will be interesting to see how this unfolds.

The more plausible explanation is something was defective. Just remember, all the suppliers are ramping up too. Hell, Apple controls everything, and even they brick iPhones with updates all the time. We live in a complex world, and it's getting more complex. Also, let's not forget the venerable 100 year old Ford's new Ford Bronco V6s blowing up when they first came out. Did they know there was a problem and ship them anyways...I think not.

 

[Carlos Thomas]

Update: I got a message in my app in response to my service request that said they are awaiting on parts to be able to service my Cybertruck. It seemed like a pre-canned message. I replied back letting them know the vehicle is not really drivable due to various critical errors.

Then they called me right away. They saw the history of the alerts and asked questions as to what happened on each of the three critical failures. They said don’t drive it in to them (15 minutes away) and arrange for Tesla Roadside Service to come get it versus waiting until my appointment on March 4th. They said they would provide a loaner car while it is in service.

So tomorrow late morning it is going to get towed/transported to Dublin, CA.

 

[Gigahorse]

Update: I got a message in my app in response to my service request that said they are awaiting on parts to be able to service my Cybertruck. It seemed like a pre-canned message. I replied back letting them know the vehicle is not really drivable due to various critical errors.

Then they called me right away. They saw the history of the alerts and asked questions as to what happened on each of the three critical failures. They said don’t drive it in to them (15 minutes away) and arrange for Tesla Roadside Service to come get it versus waiting until my appointment on March 4th. They said they would provide a loaner car while it is in service.

So tomorrow late morning it is going to get towed/transported to Dublin, CA.

Weird that have to bring it in for a software update, but nice that you don't have to wait until March to start the process.
Hopefully they give you a CYBERTRUCK for a loaner
Please keep us updated what happens as this software things seems to not be a one-off.

 

[JBee]

The steering was slightly heavier and the brakes were softer, similar to a ICE when there is some sort of failure. I expected the steering to feel different because it was now just two wheels. But I was not expecting the softness in the brakes. Almost like brake fade when brakes get too hot.

That is the best way I can describe the feeling while it was happening. Being that it happened 3 different times, I got a good feeling of it.

The part that throws me was that it said to exit the vehicle to let it reset and it potentially work again, which I did and the truck worked again. Then shortly after (5 minutes later) it happened again. So now it is parked until I can get it serviced. Hoping the OP gets it figured out first.

That does sound like a major failure in the power system, I'm surprised both the steering assistance and the brake booster went offline at the same time. Once again, these should not fail at the same time at all, just imagine you're coming down a hilly pass at the time.

It now sounds like not only one power supply rail failed but all of them. That would point towards a design problem, not just a component failure, because it took a bunch of other systems down with it when it shouldn't have.

Seeing that you still had steering at least one redundancy was working for that, maybe just what was left in the 48V battery.

What makes you say you "only" had two wheel steering? Didn’t it turn sharp either, or did you not see the rear wheels steer? Both the front and rear axle steering is SbW so there is no mechanical connection to the steering wheel at all from either.

I must say that you were pretty brave trying to reset it three times. I'd have been pretty anxious after the first failure, the second failure would have resulted in a instant tow for safety reasons.

 

[JBee]

The more plausible explanation is something was defective. Just remember, all the suppliers are ramping up too. Hell, Apple controls everything, and even they brick iPhones with updates all the time. We live in a complex world, and it's getting more complex. Also, let's not forget the venerable 100 year old Ford's new Ford Bronco V6s blowing up when they first came out. Did they know there was a problem and ship them anyways...I think not.

A single component failure should not cascade through other critical sysytems upon failure. This is the fastest way to get a flight crash investigation episode on TV.

If they are not isolated from eachother that means the design allowed for the connection to exist. That is a design problem as well as a component failure problem. The design should always accommodate and isolate the component failure, regardless of the cause.

In GA there is not much FbW, and autopilots rely on trim to maneuver in flight, not the full control surfaces. This means pilots can use their physical control inputs to maintain attitude control regardless of what the autopilot wants to do or not, because the larger control surfaces are linked to the pilot controls and only the smaller trim tabs to the AP. Obviously passenger sized aircraft FbW is different again.

The avionics typically have a backup, especially the electronic ones, but often you also have steam gauges for backup of the essentials.

The difference here is that the CT has no mechanical linkage at all, unlike the GA, so if there is no power to the SbW there is also no steering at all.

But that a steering failure also takes out the brake booster is not at all the way to safely manage such a failure. This seems to be a bigger problem, which only a redesign can fix, and replacing components won't be able to change.

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