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With 9 miles of Electric left car tries to switch to gas but instead completely dies. Car won't re-start with electric or with gas. Chevy dealer said it needed a new starting battery. Put in brand new battery for starting. 2nd time out again with 9 miles of Electric left car dies. Has to be towed both times. Anyone have this problem or have an idea what is wrong?
 

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With 9 miles of Electric left car tries to switch to gas but instead completely dies. Car won't re-start with electric or with gas. Chevy dealer said it needed a new starting battery. Put in brand new battery for starting. 2nd time out again with 9 miles of Electric left car dies. Has to be towed both times. Anyone have this problem or have an idea what is wrong?
Loss of 12V AGM while driving should never affect the operation of the Volt while driving (not turned on is a different issue) as long as your 14V APM is working properly. Matter of fact you can drive the Gen1 around w/o the 12V AGM battery connected (been there done that) and it doesn't even latch any DTCs on my Gen1 or affect it negatively at all.

You may want to visit another GM service dept since your Volt shouldn't just be dying while driving and not throwing out any relevant DTC codes.
 

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And no CEL?
 

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Have you previously been able to drive on gas with a fully-depleted battery or in Hold Mode?

Is your Volt a 2016 or newer model? Were you in Mountain Mode both times this happened (the Mountain Mode-maintained buffer in a Gen 2 Volt is ~ 9 ev miles, or ~2 bars, so the transition to ICE should happen with ~9 ev miles remaining)? If so, your Volt was for some reason unable to transition from Electric Mode to Extended Range Mode. If you lift the hood while the car is on and parked, the gas engine should start up (for safety reasons). Does it? If you switch to Hold Mode while driving, the engine should start. If you do so with 20 or more ev miles remaining (i.e., more than ~9 ev miles), does it?
 

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Just to clarify a bit, the motor generator and HV battery actually turns the engine to start it. Not the 12v battery.
 

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In 2nd gen volt drive motor / generator A is used to start the (ICE) internal combustion engine, act as a generator and propel the vehicle when in the correct mode
 

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With 9 miles of Electric left car tries to switch to gas but instead completely dies. Car won't re-start with electric or with gas. Chevy dealer said it needed a new starting battery. Put in brand new battery for starting. 2nd time out again with 9 miles of Electric left car dies. Has to be towed both times. Anyone have this problem or have an idea what is wrong?
It could be that there's a problem with the main li-ion battery, which would be covered by the Voltec warranty. You may want to reach out to a Volt Adviser:

(877) 486-5846
[email protected]

I hope it's something simple to adjust / replace.

Also, consider using a surge protector with your charger cable. There are whole house models available such as these:

https://www.homedepot.com/p/Eaton-Ty...CH230SUR%09SKU

https://www.homedepot.com/p/Leviton-...-SRG/202993881
 

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Discussion Starter #8
You are absolutely right. A section of the battery is bad and is being replaced under warranty. Thanks for the help.
 
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