Honda ODYSSEY 2020 Owner's Manual page 12

Auto Idle Stop Function
To improve fuel economy, the engine stops and then restarts as detailed below. When Auto Idle Stop is on, the Auto Idle Stop indicator
(green) comes on. (P 558)
At
Deceleration
Stop
Keep the brake pedal
depressed.
Start-up
Release the brake pedal.
10
Automatic transmission
Stop the vehicle and depress the brake pedal.
U.S. Canada
With the automatic brake hold system activated,
you can release the brake pedal when the
indicator comes on.
With the automatic brake hold system activated,
depress the accelerator pedal.
Engine status
On
Off
Restarting