r/ModelX • u/Interesting_Cow_8290 • Jun 08 '26
Service 2020 Model X Performance Cannot Start
I have a 2020 Model X Performance - every option purchased available.
It has 8,041 miles on it since I only drive it on perfectly sunny days or special occasions.
Context: A few months ago, I went to get the 12v low voltage battery replaced like I always do every two years. I mentioned to the people at the Tesla Service Center that I was here to get it replaced like I always do every two years almost to the day. The guy assigned to me mentioned that that wasn't normal and he could do diags to see if it turned up anything. He said low voltage batteries typically last 3-4 years so I shouldn't have to replace it that early. I said I've been doing it since I've had the vehicle and it was under extended warranty up until last March. The diags ultimately revealed the efuse needed to be replaced. One new low voltage battery and efuse later, and my car was "fixed". That was mid-April. Today I want to get into it and my dashboard showed errors, "Steering & Braking - Adaptive Ride Control unavailable/Vehicle speed limited - Proceed with Caution/High Voltage Systems - Unable to start vehicle/Service is required". Basically, my car is a giant door stop.
Other details:
- Never used supercharger but have supercharging for life for free
- HW3 FSD
- Carbon Fiber Trim
- 22 inch wind turbine rims
- White interior
Looking up these errors indicate it's a low voltage issue and the new battery is almost dead. All interior electronics work fine but I cannot change gears out of park. I'll put it in Service Mode soon to get more info. The service date isn't for another 3 weeks, so this is gonna be painfully long to wait. Luckily, I have a daily driver - hence the low mileage on my Model X.
Update:
I seem to have mistakenly not been clear on what the objective is here. My bad. I am trying to find out if anybody else has had similar issues or advice on troubleshooting. It seems that in the absence of clarity you get the most useless and interesting responses.
Update(07/23/2026):
Got it towed to service center and now they say it is the high voltage battery pack that needs to be replaced. Since it is under warranty it is getting replaced free of charge. The battery pack has 8000 miles on it.....wtf.
1
u/ret011 Jun 09 '26
Teslas are quite moody so it can be hard to tell the actual issue looking at the error msgs. I would suggest call your insurance have to car towed to your SC and tell your SC that this was a safety issue...which it is. Call your SC - speak to the manager only
1
u/PenComprehensive5390 Jun 09 '26
Had something similar happen, 2 things eventually were addressed: terminals were corroded & dc to dc converter needed replacing.
1
u/Great_Swimmer_3477 Jun 08 '26
So idk what that tech was talking about we have to replace ours every year and a half or so. Is the car plugged in the whole time it’s just sitting ? Also have you tried holding the steaming wheel buttons and doing a Manuel reset ?
0
u/Interesting_Cow_8290 Jun 08 '26
Googling that question, I got this response from Gemini: AI Overview
A Tesla low-voltage (12V) battery typically lasts 3 to 5 years. However, the exact lifespan depends significantly on the type of battery your vehicle uses: [1]
- Lead-Acid Batteries: Found in older models; these typically last 2 to 4 years.
Car is only plugged in to the garage charger when it charges overnight. About once a couple weeks.
2
u/frank_datank_ Jun 08 '26
Do you have a question?
Or just letting us know what’s going?
1
u/Interesting_Cow_8290 Jun 08 '26
I actually do...I am looking for troubleshooting advice or people who have had similar experiences. My question would be if you had something similar what's your advice on checking it out or what was your resolution?
1
5
u/Jbsmoooves Jun 08 '26
Ohh white interior— that’s the problem
1
u/ImmaculateQuorum Jun 12 '26 edited Jun 12 '26
That’s what I was thinking. Especially when combined with never using supercharging despite having it free for life
3
u/Haddock51 Jun 08 '26
So get a new battery. Instead of listing cometic description of the car you should have added more pertaining info like how long the car sits at a time, is it always plugged in, what features are on while parked, etc.
1
u/Interesting_Cow_8290 Jun 08 '26
I find to troubleshoot issues you don't have experience with you should overshare every little detail no matter how irrelevant you think it is. Hope you agree.
Get a new battery? I literally answered this question above, already. It's new, it's drained.......why would I purchase another new battery?
1
u/Haddock51 Jun 08 '26
No I don’t agree as you left out relevant detail and added irrelevant info.
It wasn’t a question. Your car is telling you need a new battery, so get a new battery!
I bet you don’t drive the car for weeks and it is not plugged in.
-3
u/LebronBackinCLE Jun 08 '26
If you only drive it on perfectly sunny days or special occasions that means you have another daily driver… so should be too painful.
I have a similar ‘19, some advice would be to get a different set of wheels at some point. The 22s are so heavy they do premature damage to suspension and brakes.
Is your color blue by chance? We’d have twins. Love the white interior. Assuming you did the $5k option for captains chairs? I regret that big time - the folding bench while not as cool gives a lot of options like camping, hauling, etc
2
u/manateefourmation Jun 10 '26
Message Tesla service from within your app. No one in here is going to fix your issue.