Have you guys tried the ERDTT Resistor mod?
I’ve thought about it but as much as i hate buying gas I’ll defer to the expertise of the designers. I’m going to leave it as is.
The lead engineer for the Volt is actually the guy who wrote the book on the ERDTT defeat, so you don't have anything to worry about.
. I can confirm that all normal battery protection features and such will still function even if you defeat ERDTT with the sensor mod.
I've done it on my Volt and it worked awesome last winter - on trips where I was totally within battery range the engine never ran for ERDTT. The only issue is that you soon discover that a 6KW electric heater isn't exactly massive, so when temps get below about -15c the electric heat alone struggles to heat up a stone cold cabin. Once warm, no problem, but that initial heat up took some time.
This year once the cooler weather arrived I flipped the toggle switch for my ERDTT defeat..and it didn't work. I think the resistor is burned out, or maybe one of the wires came off. Either way, I didn't worry too much about it this year since I'm not being quite as anal about using a little gas in the extreme cold this year vs last.
I also have the "MyVoltHold" app (as well as MyVoltStar and MyGreenVolt) app on a cheap old android handset that is affixed to the dash which can override ERDTT via software, so I've been using that when I do want to override things.
It's supposed to warm up to 3 or 4 on Sunday last I saw...which considering the temps we've been having should feel positively balmy, so maybe I'll pop the hood and look at the resistor then.