I was thinking of using something like an Arduino to monitor the sensors. At the right temperatures, it would disconnect the sensors from the car (while the microcontroller still monitors them) and send the car the appropriate spoofed signal. I would want to figure out a way to make it fail safe, so if the Arduino crashes or dies, the car would just see the sensors with no change.
Probably not really worth it, especially when Hybrid Assistant can at least help keep the battery from getting too hot to begin with. I think I've had issues with Pandora crashing while using Hybrid Assistant, maybe I'll have to just stick an old phone in the glove box and have it run Hybrid Assistant.
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