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Discussion Starter · #1 ·
"Service High Voltage Charging System" - Dropped from 170 miles range to 0 miles

Hi everyone. I've been a happy Bolt owner since March when I bought a 2019 Chevy Bolt EV Premier -- until that ended yesterday evening. I actually took the Bolt on my first long distance trip last week but hadn't used it since Monday. Normally charge it to 80% capacity and definitely did not mind driving at 65 mph and stopping every few hours. It made the trip to and fro much more relaxing than I was expecting.

That said, I drove my Bolt about 12 miles away from home last night and was about a mile into heading back when I was stopped at a stop light. Looked down at the information screen and it told me to shift to park. I had been at about 170 miles worth of range and it suddenly said I had zero. Turned off the car and turned it back on and I started getting nothing but the following messages: "Service High Voltage Charging System" "Service Vehicle Soon" along with the car-exclamation-point light. Ended up calling a tow truck and a few cops quickly stopped and helped to direct traffic (I was luckily stopped in a turning lane to begin with). Upon further reflection, I should have just had it towed to the dealership near where I live but I figured I'd get it home and try to cess out the situation. Towing was a little interesting since I had to find out how to attach the towing eye and wrangled a bit with an automatic parking brake that turned itself on on a few times. I live in flat Florida and we don't really have to worry about parking brakes all that often. :)

I read a number of posts in this forum and tried charging and fiddling around with it last night once I was home but kept getting the same messages alongside ones like "Unable to Charge" and "Initializing, Wait to Shift". The same screen that shows "Unable to Charge" confirmed that there is still about a 70%-75% charge.

After getting it towed to the dealership (the "My Chevrolet" app made that super simple), I found out that the one technician that works on Bolts is not there today but should be there Monday. And they might get a chance to look at it Monday. And until it has diagnostics run, it's not possible to get a loaner vehicle. As the Bolt is my one household car, looks like I'm marooned for at least two days. I've driven it for three months and only have about 2500 miles on it. I just hope this isn't going to be a lengthy or expensive repair and really hope it's covered by the initial bumper to bumper warranty.
 

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infant mortality. should be covered under warranty. either something died, or not tightened at the factory. sorry that this happened. you're in the unlucky 1 percent (or thereabouts). might be that your fuse failed. If this happens to too many others I might buy me a spare for this very scenario.
 

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1) may be a problem with the 12V (accessory) battery. If it goes bad, the car goes wonky. Have the 12V battery tested. *INSIST* that the technician test the 12V battery *first* (a voltage test, and a 'load' test).

2) Related to above, just in case you might have a 12V problem at some point in the future, there are small, light Li-Ion "jump starter" batteries you can buy, and you should keep one in the car. If the 12V battery flakes out, you can just hook the "jump starter" up for a little while to recharge the 12V, leave it connected, and be able to drive the car home so you can hook the (12V battery) up to a charger. You do have to pull it out of the car every 2-3 months and make sure that it is charged. (rather than just charging and recharging it, when you pull it out use it to charge your laptop and phones and whatever else you can to "draw down" the internal battery so that you are not charging to full and never using it.)

3) The car is 3 months old, any problem will be covered by the warranty.
 

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Discussion Starter · #7 ·
So I got the car back yesterday and everything appears to be back to normal.

These were the notes on the diagnosed problem:

“Scan tested, code P1EC0 (Hybrid EV Battery Contractor Stuck Open)
Is set. Ran diag and found the hybrid battery manual disconnect level fuse is blown. Doc #4564678
Installed 24291219: SL-N-Lever (02211-C) 24291
Replaced the manual disconnect switch assembly and cleared the code. Charged vehicle and road tested. The vehicle is operating as designed.”
 
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