Page 555 of 684
5
When trouble arises
555
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
Warning messageDetailsCorrection 
procedure
The fuel filler door has been 
left open. Tighten the fuel 
tank cap and close 
the fuel filler door.
The charging port lid is open. Close the charging 
port lid.
■ Warning message in radar cruise mode (if equipped)
In the following cases, the warning message may not be displayed even if
vehicle-to-vehicle distance decreases:
● When your vehicle and the vehicle ahead are traveling at the same
speed or the vehicle ahead is traveling more quickly than your vehicle.
● When the vehicle ahead is traveling at very low speed.
● Immediately after cruise control speed is set.
● At the instant the accelerator pedal is depressed. 
         
        
        
     
        
        Page 558 of 684
558 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Once Contin-
uous
(Displayed alternately)(Flashes) The electronic 
key has been 
taken outside 
the vehicle and 
the doors have 
been locked 
without first 
turning the 
“POWER” 
switch to OFF. 
(vehicles with 
entry function)
Turn the 
“POWER” 
switch to 
OFF and 
lock the 
doors 
again. 
         
        
        
     
        
        Page 560 of 684
560 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection procedure
Contin-
uous Contin-
uous
(Displayed alternately) (Flashes) The driver’s 
door is opened 
and closed 
while the elec-
tronic key is out-
side the 
detection range 
and the 
“POWER” 
switch is in 
ACCESSORY 
or ON mode 
with the shift 
position not in P.
• Shift the 
shift posi-
tion to P.
• Confirm  the loca-
tion of the 
electronic 
key.
Once 
(Comes on for 15 seconds.)
The electronic 
key battery is 
low. Replace 
the bat-
tery. 
(
P. 493)
Once 
(Flashes)An open door 
has been 
closed and the 
“POWER” 
switch has been 
turned twice to 
the ACCES-
SORY mode 
from OFF. Press the 
“POWER” 
switch 
while 
applying 
the 
brakes. 
         
        
        
     
        
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5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
Interior
buzzerExterior buzzerWarning messageDetailsCorrection procedure
Once 
(Flashes)The elec-
tronic key 
does not 
operate 
properly.
P. 591
 Power 
was 
turned off 
due to 
the auto-
matic 
power off 
function.Next time when 
starting the 
hybrid system, 
increase the 
engine speed 
slightly and 
maintain that 
level for approxi-
mately 5 min-
utes to charge 
the battery.
NOTICE
■
While the engine oil level warning is displayed
Continued engine operation with low engine oil will damage the engine.
■ Engine oil maintenance message
The warning message is based on the projected driving range after engine
oil maintenance message is reset. 
The system does not monitor the purity of the engine oil. 
         
        
        
     
        
        Page 562 of 684

562 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
Charging messagesA message showing the charge results will be displayed if the
“POWER” switch is turned to ON mode after charging has completed
(when the vehicle’s charging indicator has turned off).
If one of the following messages is displayed, follow the correction proce-
dures.
If the message displays again after following the correction procedure,
contact your Toyota dealer.
*: For information about the safety functions, refer to P. 91.
MessageDetailsCorrection procedure
The charging cable has 
been connected to the 
vehicle while the 
“READY” indicator light 
was illuminated. A warning buzzer will 
sound. The hybrid system auto-
matically stopped due to 
operation of the safety 
functions
*. 
Turn the “POWER” 
switch off and perform 
charging according to the 
procedures on P. 80.
An attempt has been 
made to start the hybrid 
system while the charg-
ing cable was connected. A warning buzzer will 
sound. The hybrid system can-
not be started while the 
charging cable is con-
nected due to the safety 
functions
*.
Disconnect the charging 
cable and start the hybrid 
system. 
         
        
        
     
        
        Page 564 of 684
564 5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
MessageDetailsCorrection procedure
Charging has been 
stopped because of the 
high energy consumption 
of electrical compo-
nents, such as the head-
lights. Switch the electrical 
appliance OFF, and 
restart charging by fol-
lowing the procedure on 
P. 80.
If the message is still 
displayed, the 12-volt 
battery may have a low 
charge.
In this event, turn the 
“POWER” switch OFF 
approximately 15 min-
utes after starting the 
hybrid system, and 
restart charging.
Charging has been 
stopped because of 
extremely low voltage, 
possibly caused by the 
plug not being inserted 
correctly. Check that the plug is 
inserted correctly, and 
restart charging by fol-
lowing the procedure on 
P. 80.
Check that the plug is 
not connected to a 
power strip and that an 
extension cord, multi-
outlet etc. is not being 
used. 
         
        
        
     
        
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5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
MessageDetailsCorrection 
procedure
Charging has been 
stopped because of a 
problem with the charg-
ing cable. If the charging cable is 
not a genuine Toyota 
product, or if you are 
charging using a charg-
ing station (other than a 
Toyota dealer), try charg-
ing with a genuine Toyota 
charging cable.
If the message is still 
displayed, contact your 
Toyota dealer.
Charging has stopped 
because of the continued 
high temperature of the 
hybrid battery (traction 
battery) (in order to pro-
tect the battery). If the desired charge 
level has not been 
achieved, restart charg-
ing by following the pro-
cedure on P. 80 after the 
hybrid battery (traction 
battery) has cooled 
down. 
         
        
        
     
        
        Page 600 of 684

600
5-2. Steps to take in an emergency
PRIUS PHV_OM_OM47787U_(U)
If your vehicle overheats
Correction procedures■ If  the  high  coolant  temperatur e  warning  light  comes  on  or
flashes
Stop the vehicle in a safe place  and turn off the air condition-
ing system, and then stop the hybrid system.
If you see steam:  Carefully lift the hood after the steam subsides.
If you do not see steam: Carefully lift the hood.
After the hybrid system has
cooled down sufficiently, inspect
the hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The following may indicate that your vehicle is overheating.
●The high coolant temperature warning light ( P. 534) comes on
or flashes, or a loss of hybrid  system power is experienced. (For
example, the vehicle s peed does not increase.)
● “HYBRID SYSTEM OVERHEAT” ( P. 552) is shown on the
multi-informat ion display.
● Steam comes out from under the hood.
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