Honda 2011 Civic Hybrid Owner's Manual page 271

Auto Idle Stop Indicator
AUTO IDLE STOP INDICATOR
The indicator blinks as a reminder
that the engine has stopped because
of the Auto Idle Stop function. You
cannot restart the engine with the
ignition switch when this indicator is
blinking.
If you open the driver's door when
Auto Stop is active, the indicator will
blink and you will hear a continuous
beep. The beep will stop when you
close the door.
With the driver's door open, you will
hear a continuous beep even if the
Auto Idle Stop function is
deactivated and the engine restarts.
Always turn the ignition switch to
the LOCK (0) position and remove
the key if you are getting out of the
vehicle.
Automatic Transmission (CVT)
265