Increaded battery range after service for check engine light

P

PriusGeek

Member
My reliable 2018 Touring (75K miles) has slowly lost battery range over the years(~30-35 or so now), as expected. About a month ago, the check engine light came on, so I hooked up my ODB II dongle to see what was going on. It told me there was a P1DC7 and P0A7F fault related to hybrid battery deterioration. I took it into Honda and they verified the fault, but told me that Honda needed to see the fault again after they reset the code before they would replace the battery pack. (sounds like it would take a year to get one, but that's a story for another day...) Anyway, they kept the car for a full day before returning it to me, but here's what's odd: the guessometer range has dramatically increased. Where I used to se on average a 35 mile range at 100%, I now see over 50miles consistently. I figured they just erased some memory with a "factory reset" or something, but the range after a month and ~1.5K miles remains in the high 40's. The fault codes have not reappeared. What the heck could have happened? Does the clarity have some kind of secret reserve capacity the tech enabled? Is the guessometer gaslighting me? Any thoughts?
 
The Clarity constantly monitors the HV battery capacity. It uses some sort of algorithm that we can only make guesses about. There are certain actions (likely taken by your dealer) that can 'reset' the capacity measurement back to a factory fresh state (55 Ah). BUT - this does nothing to actually improve the battery capacity. It simply re-starts the measurement algorithm. Your car will (unfortunately very gradually) re-calculate the actual capacity, and it will return back to your former 'normal' condition. In the meantime, your range estimates will give you a false sense of 'improvement'. This process can take many weeks depending on your driving / charging routines.

You can read more about battery capacity in this thread HERE
 
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