I was travelling for a month which meant my 2022 Civic Si was left in my garage (in hindsight I should have disconnected my battery before leaving). After coming back, I noticed the auto start stop wasn't working. Maybe the battery had discharged quite a bit, but after a week of driving it still showed me the "System is warming up or charging" whenever I came to a stop. My battery also read 14.5V when the engine was on and 12.6V with the engine off, so it could not be a bad battery. Did some quick research online and someone on the older forums suggested to disconnect the battery for 10-20 seconds so that all the electronics/ECUs can reset, since the BMS might be having calibration issues.
I tried that, and voila!, the start stop started working again!
Putting this on a post to this forum in case anyone else has a similar issue with any electronics/calibration. The good old "turn it off and on again" solution just works sometimes.
I tried that, and voila!, the start stop started working again!
Putting this on a post to this forum in case anyone else has a similar issue with any electronics/calibration. The good old "turn it off and on again" solution just works sometimes.