Toyota prius Owner's Manual page 215

When the P position control system malfunctions

The "POWER" switch will not be able to be turned off. In such a case, the
switch can be turned off after applying the parking brake.
Have the vehicle inspected by any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional immediately.
 Ending display
When the "POWER" switch is turned off, each of the following will be dis-
played on the multi-information display, and will extinguish after approxi-
mately 30 seconds.
 The driving distance, driving time, consumption and eco savings since
the hybrid system was started
 The odometer
 The clock
*
: The amount of money saved or spent, selected on the Eco savings record
display (P. 64), is displayed.
CAUTION
When starting the hybrid system

Always start the hybrid system while sitting in the driver's seat. Do not
depress the accelerator pedal while starting the hybrid system under any cir-
cumstances.
Doing so may cause an accident resulting in death or serious injury.
 Stopping the hybrid system in an emergency
If you want to stop the hybrid system in an emergency while driving the vehi-
cle, press and hold the "POWER" switch for more than 2 seconds, or press it
briefly 3 times or more in succession. P. 575)
However, do not touch the "POWER" switch while driving except in an emer-
gency. Turning the hybrid system off while driving will not cause loss of
steering or braking control, however, power assist to the steering will be lost.
This will make it more difficult to steer smoothly, so you should pull over and
stop the vehicle as soon as it is safe to do so.
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2-1. Driving procedures
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