So I have a 2015 Prius, bought brand new in 2015. And just a month ago, my auxiliary battery (in the trunk) died and I replaced it with a geniune battery from the Toyota dealer. I noticed that after I fill up the tank to full and check the dash for miles left (countdown to zero), it's reading 500 miles. Which I know for a fact it was never that high. Does anybody know if there's something I need to reset or sync after an auxiliary battery replacement?
It happens all by itself with driving just drive the car you will settle in directly . Yes it all resets. If ya get better mileage now wen it drops again chk 12V again . Happens in my generation 2 after 12V disconnect
Everything resets to factory defaults. After a few tanks, you'll notice it normalizes... Did you charge the 12v battery? Might be a good idea to charge it for 5 or 6 hours at 5 amps or less. Then you KNOW it has a full charge. And since the inverter is not trying to charge a weak 12v battery, your MPG might actually increased the MPG...
Thanks guys. I had no idea that it "normalizes" or "settles in" after a few tanks. I guess I'll give it some time!
Have I got this right, you're upset by this? Anyway, yeah, miles-to-empty likely got reset to defaults, and will adjust over time. That said, a new battery "could" mean the engine having to work a little less, to keep it charged? Just 2 cents: I'd forgetabout miles-to-empty display, just keep an eye on the venerable gas gauge, and calculate the mpg for a few tanks.
When you disconnect the battery, it lost history of drive style so it won’t be able to project or guestimate to DTE so it reverts to factory guesstimation. You’ll be sad once the 500 DTE is lowered. Mine is 550 mi to 600 DTE right after full up
This secondary gauge only came to be in the '90's. How did we ever manage before. Google this: When did car manufacturers start adding distance to empty gauges The AI overview has some details. My parents '58 VW Bug had no in-dash method to determine how much gas was left, nothing. My dad used a stick..
