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2012 Switches to gas mode with Battery Charge remaining

19513 Views 52 Replies 22 Participants Last post by  hellsop
I have a 2012 Chevy volt with 140,000 miles. It has not had any issues until now. The car will switch to gas mode while there is still plenty of charge remaining in the battery (as much as 80%). The temperature is well above freezing. Stopping, shutting of the car off and restarting resolves the issue. I took it to the dealer. however, the computer was not writing any errors codes.

Any ideas what could be causing this?
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I have the MyGreenVolt app (free). If the car is off, not plugged in, the battery temp gets very cold. I can't remember exactly, but I believe I have seen the battery at 20 degrees in the past. Given the chance to warm the battery it warms to 50 degrees. I would guess that is the temperature it is happiest at then according to the engineers. I can't remember the top end number, but I know it is at least 70 degrees. I should note, I have a ERDDT defeat switch and have had no problems with the battery being too cold over the past 4 years that I have had the switch installed. Except for my recent temporary, self-correcting glitch you saw on my other post, cold isn't a problem. Eric Belmer (Facebook, over 425k mile Volt), as his battery aged, he gets the message that "Propulsion power reduced" (or something like that) and the engine kicks in to help the battery. We haven't gotten this message, so I don't think we are in the same boat. Different issue. The running of your engine for .03 to .10 gallons is the typical level for warming the engine if it kicks on for any reason. I really like the idea of the hood switch toggling the engine and it stays on to complete the warming cycle, only because there is no error message.
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