2020 TOYOTA PRIUS C check engine

4247-3. Do-it-yourself maintenance
PRIUS c_U■
Adding engine oil
If the oil level is below or near
the low level mark, add engine
oil of the same type as that
already in the engine.
Make sure to check the oil type and prepare the items needed
before adding oil.
Remove the oil fille r cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the following
situations, oil consumption may increase, and engine oil may ne ed to be
refilled in between oil maintenance intervals.
● When the engine is new, for example directly after purchasing t he vehicle or
after replacing the engine
● If low quality oil or oil of an inappropriate viscosity is used
● When driving at high engine speeds or with a heavy load, or when driving
while accelerating or decelerating frequently
● When leaving the engine idling for a long time, or when driving frequently
through heavy traffic
Engine oil selection P. 539
Oil quantity
(Low  Full) 1.6 qt. (1.5 L, 1.3 Imp. qt.)
Item
Clean funnel
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2
3

4257-3. Do-it-yourself maintenance
7
Maintenance and care
PRIUS c_U
WARNING
■Used engine oil
● Used engine oil contains potentially harmful contaminants which may
cause skin disorders such as inflammation and skin cancer, so c are
should be taken to avoid prolonged and repeated contact. To remove used
engine oil from your skin, wash thoroughly with soap and water.
● Dispose of used oil and filters only in a safe and acceptable manner. Do
not dispose of used oil and filters in household trash, in sewe rs or onto the
ground. Call your Toyota dealer, service station or auto parts store for
information concerning recycling or disposal.
● Do not leave used engine oil within the reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■ When replacing the engine oil
● Be careful not to spill engine oil on the vehicle components.
● Avoid overfilling, or the engine could be damaged.
● Check the oil level on the dipstick every time you refill the v ehicle.
● Be sure the engine oil filler cap is properly tightened.

4277-3. Do-it-yourself maintenance
7
Maintenance and care
PRIUS c_U
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite, and non-bora te coolant with
long-life hybrid organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixture of 50% coolant an d 50%
deionized water. (Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant an d 45%
deionized water. (Minimum temperature: -44 F [-42 C])
For more details about coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiators, hoses, engine/power control unit coolant reser-
voir caps, drain cock and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling systems.
WARNING
■ When the hybrid system is hot
Do not remove the engine coolant radiator cap and power control unit cool-
ant reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding coolant
Coolant is neither plain water nor straight antifreeze. The cor rect mixture of
water and antifreeze must be used to provide proper lubrication , corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent it from damaging p arts or paint.

4547-3. Do-it-yourself maintenance
PRIUS c_U
Vehicles without a smart key system: Turn the power switch to the
“LOCK” poison.
Vehicles with a smart key syst em: Turn the power switch off.
Engine compartment
Push the tab in and lift the cover off.
Under the instrument panel
Remove the cover.
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may
have blown. If this happens, che ck and replace the fuses as nec-
essary.
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2
Type A fuse boxType B fuse box
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5328-2. Steps to take in an emergency
PRIUS c_U
WARNING
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the ho od until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.
● After the hybrid system has been turned off, check that on the multi-
information display and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may au tomati-
cally start, or the cooling fan may suddenly operate even if th e gasoline
engine stops. Do not touch or approach rotating parts such as t he fan,
which may lead to fingers or clothing (especially a tie, a scarf or a muffler)
getting caught, resulting in serious injury.
● Do not loosen the radiator cap while the hybrid system and radi ator are
hot.
Serious injuries, such as burns, may result from hot coolant an d steam
released under pressure.
NOTICE
■ When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sa nd or dust
etc.).
● Do not use any coolant additive.

5399-1. Specifications
9
Vehicle specifications
PRIUS c_U
*: The engine oil capacity is a reference quantity to be used when changing
the engine oil. Warm up the engine and turn off the hybrid system, wait
more than 5 minutes, and check the oil level on the dipstick.
■
Engine oil selection
“Toyota Genuine Motor Oil” is used in your Toyota vehicle. Use
Toyota approved “Toyota Genuine Motor Oil” or equivalent to sat isfy
the following grade and viscosity.
Oil grade: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice
for good fuel economy and
good starting in cold weather.
If SAE 0W-20 is not available,
SAE 5W-20 oil may be used.
However, it must be replaced
with SAE 0W-20 at the next oil
change.
Hybrid battery (traction battery)
Type Nickel-metal hydride battery
Voltage7.2 V/module
Capacity 6.5 Ah (3HR)
Quantity20 modules
Nominal voltage 144 V
Lubrication system
Oil capacity (Drain and
refill reference
*)
With filter
Without filter 3.9 qt. (3.7 L, 3.3 Imp. qt.)
3.6 qt. (3.4 L, 3.0 Imp. qt.)
Outside temperature

590Alphabetical index
PRIUS c_U
Eco drive mode ........................ 203
Electric power steering ........... 265
Electronic keyIf the electronic key does not operate properly ........... 520
Emergency flashers Switch ................................... 468
Emergency, in case of
If a warning buzzer sounds ........................ 480, 488
If a warning light
turns on .............................. 480
If a warning message is displayed ............................ 488
If the electronic key does not operate properly ........... 520
If the hybrid system will
not start .............................. 518
If the vehicle becomes stuck ................................... 533
If the vehicle 12-volt battery is discharged .......... 522
If the vehicle is trapped
in rising water ..................... 471
If you have a flat tire ............ 505
If you lose your keys ............. 122
If you think something is wrong.................................. 479
If your vehicle has to be stopped in an
emergency.......................... 469
If your vehicle needs to be towed ............................. 472
If your vehicle overheats ....... 529 Engine
Compartment ........................ 422
Hood ..................................... 419
How to start the hybrid system ....... ................. 188, 192
Identification number ............ 537
If the hybrid system will not start .............................. 518
Ignition switch ............... 188, 192
Overheating .......................... 529
Power switch ................ 188, 192
Engine coolant Capacity................................ 540
Checking............................... 426
Preparing and checking before winter ...................... 274
Engine oil
Capacity................................ 539
Checking............................... 423
Preparing and checking before winter ...................... 274
Engine/power control unit coolant
Capacity................................ 540
Checking............................... 426
Preparing and checking before winter ...................... 274
EPS ........................................... 265
EV drive mode ......................... 199
Event data recorder................... 11
Exclusive jump starting terminal .................... 522
E