What issues have you had from a low battery/batteries? I'm asking because I've been chasing down a code 57 problem and I'm highly doubting its the actual sensor (TR sensor on 3+ week backorder anyway) I've checked so many things and all seems fine but it won't down shift. It'll run through the gears once when its cold and thats it. When it does, it down shift kind of slow. When I pull the shift motor it seems to work fine. When it sits over night the battery clicks and start really slow. Put it on the charger and its fully charged in less than 10min. That is an obvious issue. I didn't know i had that problem because its always on a charger.. when its running the volts seem good. I know low voltage causes odd issues. Just looking for some insight. And yes. The easy thing to do is replace both batteries, TR sensor and shift motor but I'm looking at close to $450.