Toyota 2013 Prius Owner's Manual page 63

1-1. Plug-in hybrid system
HV mode
■
The EV drive mode indicator (
is in EV mode, and will turn off if HV mode is switched to.
36
PRIUS PHV_OM_OM47787U_(U)
If only a little electricity is remain-
ing in the hybrid battery (traction
battery) and the vehicle cannot
be driven using the electric
motor (traction motor) only, the
electric motor (traction motor)
and the gasoline engine will be
used together.
The Hybrid System Indicator can
be used to check which mode
the plug-in hybrid system is cur-
rently being driven in.
) will illuminate when your vehicle