2018 TOYOTA PRIUS PLUG-IN HYBRID low oil pressure

2083. Instrument cluster
PRIUS PHV_OM_OM47C99E_(EE)
Warning lights inform the driver of malfunctions in any of the vehicle’s
systems.
Warning lights
Warning lightsPages
*1Brake system warning light (Red) P. 671
*1Brake system warning light (Yellow) P. 671
*1Charging system warning light P. 671
*1Low engine oil pressure warning light P. 672
*1Malfunction indicator lamp P. 672
*1SRS warning light P. 672
*1ABS warning light P. 672
*1Electric power steering system warning light
(Red/yellow) P. 672
*1, 2PCS warning light P. 673
*1Slip indicator light P. 673
*1High coolant temperature warning light P. 673
*1, 3ICS OFF indicator (if equipped) P. 674
Open door warning light P. 674
Low fuel level warning light P. 674

5727-1. Maintenance and care
PRIUS PHV_OM_OM47C99E_(EE)
Cleaning and protecting the vehicle exterior
●Working from top to bottom, liberally apply water to the vehicle
body, wheel wells and underside of the vehicle to remove any dirt
and dust.
●Wash the vehicle body using a sponge or soft cloth, such as a
chamois.
●For hard-to-remove marks, use car wash soap and rinse thoroughly
with water.
●Wipe away any water.
●Wax the vehicle when the waterproof coating deteriorates.
If water does not bead on a clean surface, apply wax when the vehicle
body is cool.
■Before car washes
Check that the fuel filler door and charging port lid on your vehicle are closed
properly.
■Automatic car washes
●Fold the mirrors before washing the vehicle. Start washing from the front of
the vehicle. Make sure to extend the mirrors before driving.
●Brushes used in automatic car washes may scratch the vehicle surface and
harm your vehicle’s paint.
●Rear spoiler may not be washable in some automatic car washes. There
may also be an increased risk of damage to vehicle.
■High pressure car washes
●Do not allow the nozzles of the car wash to come within close proximity of
the windows.
●Before using the car wash, check that the fuel filler door and charging port
lid on your vehicle are closed properly.
Perform the following to protect the vehicle and maintain it in
prime condition:

5867-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47C99E_(EE)
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.
ItemsParts and tools
12-volt battery
condition
(P. 599)• Warm water • Baking soda • Grease
• Conventional wrench (for terminal clamp bolts)
• Distilled water
Engine/power
control unit
coolant level
(P. 596)• “Toyota Super Long Life Coolant” or a similar high
quality ethylene glycol-based non-silicate, non-
amine, non-nitrite and non-borate coolant with long-
life hybrid organic acid technology
“Toyota Super Long Life Coolant” is pre-mixed with
50% coolant and 50% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
(P. 593)• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses (P. 6 4 9 )• Fuse with same amperage rating as original
Light bulbs
(P. 653)• Bulb with same number and wattage rating as origi-
nal
• Flathead screwdriver•Wrench
Radiator and
condenser
(P. 598)

Tire inflation
pressure
(P. 622)• Tire pressure gauge
• Compressed air source
Washer fluid
(P. 604)• Water or washer fluid containing antifreeze (for win-
ter use)
• Funnel (used only for adding water or washer fluid)

6257-3. Do-it-yourself maintenance
PRIUS PHV_OM_OM47C99E_(EE)
7
Maintenance and care
■When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning valves
and transmitters that allow the tire pressure warning system to provide
advance warning in the event of a loss in tire inflation pressure. Whenever
wheels are replaced, tire pressure warning valves and transmitters must be
installed. ( P. 607)
WARNING
■When replacing wheels
● Do not use wheels that are a different size from those recommended in the
Owner’s Manual, as this may result in a loss of handling control.
● Never use an inner tube in a leaking wheel which is designed for a tube-
less tire. Doing so may result in an accident, causing death or serious
injury.
■ When installing the wheel nuts
● Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened,
leading to bolt or disc wheel damage. In addition, the oil or grease can
cause the wheel nuts to loosen and the wheel may fall off, causing an acci-
dent and resulting in death or serious injury. Remove any oil or grease
from the wheel bolts or wheel nuts.
■ Use of defective wheels prohibited
Do not use cracked or deformed wheels.
Doing so could cause the tire to leak air during driving, possibly causing an
accident.
● Be sure to install the wheel nuts with the
tapered ends facing inward. Installing
the nuts with the tapered ends facing
outward can cause the wheel to break
and eventually cause the wheel to come
off while driving, which could lead to an
accident resulting in death or serious
injury.
Tapered
portion

6728-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
Low engine oil pressure warning light
(warning buzzer)*2
Indicates that the engine oil pressure is too low
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
Malfunction indicator lamp
Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system; or
• The electronic throttle control system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
(Red/yellow)
Electric power steering system warning light (warning
buzzer)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Warning lightWarning light/Details/Actions

6778-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
*1: Brake system warning buzzer:
When there is a possible problem that could affect braking performance,
the warning light will come on and a warning buzzer will sound.
*2: Low engine oil pressure warning buzzer:
A buzzer also sounds continuously for approximately 30 seconds at maxi-
mum in addition to the low engine oil pressure warning light when the
“READY” indicator is illuminated.
*3: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle having reached a speed of 5 km/h
[3 mph]).
*4: Seat belt warning buzzer:
The seat belt warning buzzer sounds to alert the driver, front passenger
and rear passengers that his or her seat belt is not fastened. The buzzer
sounds intermittently for 30 seconds after the vehicle reaches a speed of
20 km/h (12 mph). Then, if the seat belt is still unfastened, the buzzer will
sound in a different tone for 90 more seconds.
*5: This symbol is displayed on the multi-information display.
■ Front passenger detection sensor, seat belt reminder and warning
buzzer
● If luggage is placed on the front passenger seat, the front passenger detec-
tion sensor may cause the warning light to flash and the warning buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.
■ Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer may sound.
■ If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes com-
pletely empty. If the fuel tank is empt y, refuel the vehicle immediately. The
malfunction indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized
Toyota retailer or Toyota authorized repai rer, or any reliable repairer as soon
as possible.

6838-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
■If “See Owner’s Manual” is shown
● If “Braking Power Low Stop in a Safe Place See Owner’s Manual” is shown,
this may be a malfunction. Immediately stop the vehicle in a safe place and
contact any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer. Continuing to drive the vehicle may be dangerous.
● If “Engine Oil Pressure Low” is shown, this may be a malfunction. Immedi-
ately stop the vehicle in a safe place and contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
● If the following messages are shown, there may be a malfunction. Immedi-
ately have the vehicle inspected by any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
• “Plug-in charging system malfunction.”
• “Hybrid System Malfunction”
• “Check Engine”
• “Hybrid Battery System Malfunction”
• “Accelerator System Malfunction”
• “Smart Entry & Start System Malfunction See Owner’s Manual”
■ If “Shift System Not Active Apply Parking Brake Securely While Parking
See Owner’s Manual” is shown
Indicates a temporary operation failure or malfunction in the shift control sys-
tem. Immediately have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
When the message is shown, the hybrid system may not be started or the
shift position may not be changed normally. (Coping method: P. 686)
■ If “Shift System Malfunction Apply Parking Brake Securely While Park-
ing See Owner’s Manual” is shown
Indicates a malfunction in the shift control system. Immediately have the vehi-
cle inspected by any authorized Toyota retailer or Toyota authorized repairer,
or any reliable repairer.
When the message is shown, the hybrid system may not be started or the
shift position may not be changed normally. (Coping method: P. 686)
■ If “ Switch Malfunction Apply Parking Brake Securely While Parking
See Owner’s Manual” is shown
The P position switch may not operate. Immediately have the vehicle
inspected by any authorized Toyota retailer or Toyota authorized repairer, or
any reliable repairer.
When parking the vehicle, stop the vehicle on level ground and apply the
parking brake firmly.

770Alphabetical index
PRIUS PHV_OM_OM47C99E_(EE)
Warning lights .......................... 208
ABS ....................................... 672
Brake Override System ......... 676
Brake system ........................ 671
Charging system ................... 671
Drive-Start Control ................ 676
Driver’s seat belt reminder .... 674
Electronic engine control
system ................................ 672
Electric power steering.......... 672
Front passenger’s seat belt
reminder ............................. 674
High coolant temperature...... 673
ICS OFF indicator ................. 674
Intelligent Clearance
Sonar .................................. 676
LDA (Lane Departure Alert
with steering control)
system ................................ 416
Low engine oil pressure ........ 672
Low fuel level ........................ 674
Malfunction indicator lamp .... 672
Master warning light .............. 674
Open door ............................. 674
PCS....................................... 673
Rear passengers’ seat belt
reminder ............................. 674
Seat belt reminder light ......... 674
Slip indicator ......................... 673
SRS....................................... 672
Tire pressure ......................... 675
Warning messages .................. 680Warning reflector storage
space ...................................... 558
Washer...................................... 376
Checking ............................... 604
Preparing and checking
before winter....................... 525
Switch ................................... 376
Washing and waxing ............... 572
Water-repellent coating........... 573
Wheels ...................................... 624
Replacing wheels.................. 627
Size ....................................... 734
Window glasses....................... 330
Window lock switch ................ 330
Windows ................................... 330
Power windows ..................... 330
Rear window defogger .......... 535
Washer ................................. 376
Windshield wipers ................... 376
Handling the wiper arms ....... 576
Rain-sensing windshield
wipers ................................. 376
Replacing the wiper rubber ... 643
Winter driving tips ................... 525
Wiper rubber replacement ...... 643
Wireless charger...................... 563
Wireless remote control
key .......................................... 272
Battery-Saving Function ....... 289
Locking/Unlocking................. 272
Remote Air Conditioning
System ............................... 542
Replacing the battery ............ 646