possible or hybrid problem

Wow, it's like the loaves and fishes parable! Did you drive past a church?

 

Battery temperature changes.

 

UFOs returning some of the energy they steal from our grid.

 

I see strange changes to EV miles (as in suddenly less) with a full battery on hot days when I start the car and immediately turn on the A/C. The actual EV miles don't seem to reflect that change as I go on many similar EV-only trips and get pretty much the same results. I think the EV miles calculation sometimes gets carried away with its complicated algorithm

 

Hmm. Defective brake pedal switch or something really bad indeed has happened...

 

it might very well be the 12 volt. test it cold with a digital multi meter. there is no way you can go from zero to 8 miles of ev, something is wrong.

 

By any chance, are you not pressing the brake pedal when switching on, and when putting into R, D, or B? That would cause the symptoms (and lack of any detectable problems).

 

how can not stepping on the brake add 8 miles of estimated charge to the battery?

 

I expect to be corrected by someone with more expertise in this if I'm off-track...

but believe the computer uses more than one method to determine charge level. A simple voltage reading can vary due to temperature, electrode degradation, or voltage fluctuations from the recovery-cycle occurring after recent loading or discharging. For that reason, the system also monitors and tallies current usage, in an attempt to more accurately determine the stored energy potential left in the battery.

My guess is that the computer periodically revises it's estimate, and that's why you saw an 8-mile difference from the previous reading. It may not be very accurate, but it may be Toyota's best effort at determining true charge level.

I think smartphones may be more accurate at indicating battery level than hybrid cars, because they have more accurate ways to measure power consumption, based on clock cycles and algorithms which more accurately estimate the power consumed by processor operations.

 

you may want to put a smart charger on it, in order to prevent purchasing a new battery. might be worth a try.

 

i won't correct you because i probably know less than you do. i agree that they have multiple ways of evaluating state of charge, and i have read that it's a very difficult thing to do. but i disagree that it would have 8 miles left, think it was empty and fire the ice.

 

good point.