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Electrical Hazard Possible warning

RoadTripFan

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Good Morning All,
I have had mostly wonderful experiences with my truck. This included a road trip last week that took me from Central Virginia up to Pittsburg NH to play in the snow and the cold. Truck performed well and I have no complaints about that.
On the way back, about 2 hours from home, stopped for a break and a charge. Charged at the Rivian Charger near Front Royal VA. Charged just fine with no issues and then started back on my way. About 4-5 miles form the charger I get the "Electrical Hazard" warning and pull off to the side of the road. Did a hard reset and that went away, started driving again and everything functioned normally and no further hazard lights came on. Called Service and had them log the issue.

(Side note, I know the warning says to drive to a service center immediately - for where I was at, my home was 2 hours away and the service center is another hour past that. So driving to home was always going to be a part of getting to a service center. Two other factors in my decision making: I was on the tail end of an 8 hour day of driving and tired and the timing was such I could not have made it to a service center before it was closed.)

So drove on without issue and then stopped at a Tesla SC close to home just to give the battery a little extra juice owing to the approaching winter storm and wanting to be sure I had enough range for whatever might transpire. Plugged in with the NACS adapter from Rivian and within 10 seconds got a red light. Tried another charger, same thing.Got in and checked the drivers dash screen for warning lights and what not and saw nothing. Then opened to warnings menu and found that DC Charging was unavailable. (Side Note 2: with the warning only appearing under the "alarm bell" menu it is easy to miss as that always has something on it from Gear Guard and so it doesn't stand out. There should be a Dash Warning, Wassym)

I had enough range to make it home and so drove home, unpacked and plugged it into my Level 2 charger and yes, it was charging just fine at the usual 11kW I get from my ChargePoint charger. Created a detailed service request in the Rivian App and then followed up with a call to to service. On both the App and the Call I am getting told the first appointment is April 11th. (95 or so days away, but who's counting? lol)

During the course of all of this I also hunted on the forums for this issue and have tried the Hard reset and letting the truck go to sleep to see if that resolved the charging issue. After doing those items, you get in the truck while in park and there is no warning. UNTIL you put your foot on the brake and shift it into gear, then it comes back.

So just reaching out to see what others have experienced and what I may have missed. In my searching on the forum I see three possibilities - least likely is an HV Battery issue (I say least likely because all of those seem to go into turtle mode) and then two that are more likely: 1. a potential harness issue that has seemed to pop up with some of the Gen 1's and 2. The HVAC plug on the original builds that allows water to get into places it shouldn't thereby causing a voltage issue that triggers the electrical warning. I lean towards this one just thinking of how much the heat was used in the snowy/icy 9 degree weather in NH and how that last fateful occurred was the first charge where in we were in temps that were above freezing and the ice that was everywhere on the truck was starting to melt.

So, if you've made it this far in this post, thanks for hanging in for so many words!! please know I love this truck and have had so much fun in it and so even though I want the simplest solution possible for this issue, it is because I want to get back out in the wild in it and in no way has made me want to trade in the EV.

Here is the post concerning the HVAC/Water issue I referenced:
https://www.rivianforums.com/forum/threads/electrical-hazard-possible-issue-message.12840/

Here is the other more general one
https://www.rivianforums.com/forum/...isabled-and-electrical-hazard-possible.28556/

Rivian R1T R1S Electrical Hazard Possible warning Electrical Fault


Rivian R1T R1S Electrical Hazard Possible warning DC Charging Not Available
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Thanks for sharing your incident. Since you can L2 charge, it does seem more likely that it is an electrical issue as opposed to a battery issue. Let us know what you find out!
 

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To confirm, it's a 2022 Quad R1T with large battery?

Also, how were battery and motor temps looking before/after the DC charge that set it off?

Hypothesis: very high internal temps, loosening a wire somewhere. Likely still functions but should be tightened to prevent arc, so system shut it off until inspected and system reset with pro software.
 

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I had the same message on my 2023 Gen 1 R1T. I always charge at home so no experience with fast charging. Message Went away after hard reset, but eventually came back after a few weeks. SC said it had something to do with water not draining out of HVAC. First they replaced the heater. Got truck back and problem returned after a month. Then they replaced entire hvac. Problem has not returned (but am having other hvac issues).
 

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This exact thing happened to me last summer. It escalated over a matter of hours to the point that I had a bricked truck and required a SC tow.

Mine was the HVAC issue. The techs knew exactly what it was before they even got it off of the tow truck. The subsequently replaced the entire HVAC unit with the newer model...oh, and also the carpet which was wet due to the water intrusion.
 

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So, Rivian proactively changed my HVAC drain something-or-other when I last took it in for service. Guessing this has something to do with that.

Edit: HVAC assembly drain valve was replaced as part of a customer satisfaction campaign.
 

a99ieJem

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So, Rivian proactively changed my HVAC drain something-or-other when I last took it in for service. Guessing this has something to do with that.

Edit: HVAC assembly drain valve was replaced as part of a customer satisfaction campaign.
Well, I just had that drain valve replacement at a SC appointment last month. Apparently, it is a new thing they are doing. The new HVAC unit they put in mine still had the old valve design.

I would think OP needs the new HVAC unit and the new valve.
 
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RoadTripFan

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Good morning!
Wanted to pop in and provide an update.
Had reached out to service and originally got an April service appt. Once I got that I just called in and explained the need for something sooner (also texted in the app under the appt - the text seems to go straight to the SC.) They got my appointment moved up and I dropped off the truck on Wednesday Jan the 8th.

As per usual, the Richmond Service Center folks were great! Let me share my experience and also were pretty honest that they mostly wanted to get me in a rental so that I did not have the range issues as I frequently DC Fast Charge as a part of my work and so not having that capability was a no-go for me.

I agree with the other posts I have seen on here that this really sounds like the HVAC issue. Particularly as I was traveling from Frozen NH climes to temps that were above freezing in Virginia.

My rental is a 2024 F150 4x4. Not a bad replacement while I am awaiting the fix.

Service is saying it will be next week before they can look at the truck and then likely another week for parts and fix, so two weeks total. Though this feels like a long time to me when I heard it, I also realize they were getting me in so I could get a rental on them and will work my truck into their schedule. And also that is it is a far sight better than waiting until April.

Will update as the service progresses.
 
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RoadTripFan

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Service hasn't gotten to my truck as of yet... Ten days so far that I am in the rental.
 

savethemanual

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My rental is a 2024 F150 4x4. Not a bad replacement while I am awaiting the fix.

Service is saying it will be next week before they can look at the truck and then likely another week for parts and fix, so two weeks total. Though this feels like a long time to me when I heard it, I also realize they were getting me in so I could get a rental on them and will work my truck into their schedule. And also that is it is a far sight better than waiting until April.

Will update as the service progresses.
Rivians service costs have to be an insane number on their balance sheet. Two weeks of renting an F150 adds up....times the hundreds incidents like this. Yikes!
 

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RoadTripFan

RoadTripFan

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Yeah I would imagine its a lot. And I am assuming that this will end up taking more than 14 days by the time they diagnose, get parts and repair. The F150 4x4 is not a terrible temp truck though...
 
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RoadTripFan

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So yesterday I was told that my Truck was with the Diagnostics technician. I inquired today as to what they had found and got a message that "the data that was collected has been escalated to the engineering dept"

No idea what that means.
Today is day #22
 
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RoadTripFan

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The Richmond SC called me back and basically, from what I understood, elevated to engineering department means either 1. The tech can not find any reason for the error and also can not reset it OR 2. The data shows things that they can not diagnose at the SC level and so it there is someone who is (presumable) more techy who is now reviewing that.
The SC also said that in his experience, Engineering will often callback, ask for more or different data and then take a while again.

Looks like I am riding around in the F150 for a while longer.
 
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RoadTripFan

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And to day the update is that Engineering has asked for more data points which they say requires taking out some components and testing them. SC thinks they have this done and sent back to Engineering in another couple of days...
No repairs done as of yet, just the diagnosis loop.

This is day #27
 
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RoadTripFan

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So...
They have decided to replace the electrical harness and the HVAC Drain plug. (Enginerreing wanted the harness replaced and I shared the HVAC plug thread issue and asked they do that at the same time, not sure if they had it already in their plan or added it when I asked.)

So they had to order the parts and those came in yesterday (Monday the 3rd) and they are saying they will begin the work today. Not sure how long this is supposed to take to get it done but hoping it is pretty straightforward for them.

Rechecked all of the dates for accuracy and... today is day number 30 since the charging failure happened and was reported.
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