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Discussion Starter · #1 ·
Hi , I left my 2019 Chevy volt at the Garage and went out side the country for almost 40 Days , when I came back i found the volt‘s battery ( main and the 12v ) at zero charge , changed the 12v battery , but nothing change , screen showing the ( battery fault and will shutdown soon ) the power steering is not working, engine not working , the transmission is locked on P and not moving , not Accepting charging , ….. I tried to reset the batteries by scanner but the device can’t connect to the main battery …. We don’t have a dealer for Volt , any Advice please .. thanks
 

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Discussion Starter · #3 ·
I would start with a new 12v battery and not just charging the old one. once you have that, the car should at least be able to get scanned for codes.
Well i replaced the 12V battery with any one . Tried with the scan tool , Ive got 43 code , when i tried to remove the codes , the tools said failed to communicate with the battery ! So no DTC removed .tried to charge the High Voltage Battery , but said not able to charge , the transmission is locked on P , so I removed the lock manually as i have to pull the car on the side so i can use my other car was blocked behind . Maybe if the main batteries canbe charged by any other way , maybe that would solve the problem .
 

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Well i replaced the 12V battery with any one . Tried with the scan tool , Ive got 43 code , when i tried to remove the codes , the tools said failed to communicate with the battery ! So no DTC removed .tried to charge the High Voltage Battery , but said not able to charge , the transmission is locked on P , so I removed the lock manually as i have to pull the car on the side so i can use my other car was blocked behind . Maybe if the main batteries canbe charged by any other way , maybe that would solve the problem .
Post the code you got when you scanned the car. Make sure no rodents got into your wiring would be my next suggestion.
 

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I would take the car in to get serviced. you said you changed the 12v battery to a new one so that must not be it. Maybe the cells got too low when you were gone and that's causing an issue but i own a 2012 that sat for 3 years without charging and the cells were fine. sorry i can't assist further as my knowledge is very limited.
 

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Discussion Starter · #7 ·
I would take the car in to get serviced. you said you changed the 12v battery to a new one so that must not be it. Maybe the cells got too low when you were gone and that's causing an issue but i own a 2012 that sat for 3 years without charging and the cells were fine. sorry i can't assist further as my knowledge is very limited.
Thanks for trying to assist .
 

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2011 Highlander Hybrid, 2017 Volt Premier
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Here is the report , thanks for support
The car won't start or charge untill you clear the permanent DTCs.
You need to take the HV battery off the vehicle and inspect the harness and the cells inside.

❗This work is not only a complex one, but is a dangerous one due to high battery voltage.
 

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What was the charge state of the battery when you left the car sitting? It looks like many of the battery cells dropped below the minimum voltage allowed by the computer. Was the battery at zero range when you left it?
Hopefully, the DTCs can be re-set and the battery charged.
 
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