Five hours after parking my 2020 CR-V, I went to the garage to get a tool and heard a buzzing sound coming from underneath the car. I slid under the rear end and isolated the noise to what I later identified as the 'evaporative leak check pump' (17391-TLA-A03), located adjacent to the fuel vapor charcoal canister under the left rear seat. I verified ACC power was off. I checked later in the evening and the noise had stopped. I have no idea if this pump ran continuously all afternoon, or turned on later.

Is this normal? I found a picture of the assembly on the Internet.



(I got no response when I posted this in CR-V forum)

 

Gotta love EVAP crap.

The only time my Kia has ever left me stranded was out of the blue when it refused to crank at a gas station because there was a problem with an EVAP sensor. I just remember it was something ridiculous, made me late for work and the part I had to replace was a decent chunk of change for something I knew wasn't critical for the car to run. Spent an hour literally running between the gas station and a nearby Autozone to pull the code, get it fixed...

/ramble. One of several reasons I'll always prefer older cars...

 

Yes, it is normal. There is a TSB about customer complaints for the sounds after parking.

 

There already has been a CR-V thread regarding this.

https://honda-tech.com/forums/honda-...v-off-3351935/

 

I found a similar forum discussion via Google about a Prius, so I suspected it was normal. Thanks for confirmation, and thanks for the link!