Engine, exhaust system and fuel for Your Skoda Octavia 4 Door Fourth Generation (2021-2026)

Engine, exhaust system and fuel › Bonnet 175  
Troubleshooting  
Engine, exhaust system and fuel  
Message regarding system unavailability  
Bonnet  
Stop the engine and start again.  
If the system is still not available, seek the help of a  
specialist garage.  
Opening the bonnet  
Before opening  
Incorrect resulting position of the vehicle in the  
parking space  
Make sure the windscreen wiper arms are folded  
down onto the windscreen.  
The correct parking procedure depends on the size  
of the wheels. If other wheels approved by ŠKODA  
AUTO are fitted, have the system readjusted by a  
specialist garage.  
Keep everyone away from the engine compart-  
ment.  
Opening  
Pull the release lever  
underneath the dash  
panel.  
Release the lock.  
Lift the bonnet so that  
the gas pressure  
springs hold it open.  
Closing  
Pull the flap down.  
Close the flap with a slight push from a distance of  
about 20 cm.  
Check that the bonnet is closed.  
NOTICE  
Do not press down on an unclosed bonnet.  
Open and close the flap again.  
Engine oil  
Checking the fill level and topping up  
Test conditions  
The vehicle is on a horizontal surface  
The parked engine is warm  
Check the level with the dipstick  
Wait a few minutes for the engine oil to flow back  
into the oil sump.  
Remove the dipstick and wipe with a clean cloth.  
Insert the dipstick as far as it will go and pull it out  
again.  
176 Engine, exhaust system and fuel › Coolant  
Read the oil level and push the dipstick back in  
again.  
or  
flashes, lights up at the same time  
Check the engine oil level.  
The oil level is OK, the warning light continues to  
flash:  
Stop the engine and seek the help of a specialist  
garage.  
Engine oil level too low  
illuminates together with  
The oil level must be within the marked range.  
or  
NOTICE  
illuminates together with  
Message regarding required engine oil top up  
Risk of damage to the engine and the exhaust sys-  
tem!  
The oil level must not be outside the marked range.  
If it is not possible to top up the engine oil or if the  
oil level is above the marked range, do not continue  
driving. Stop the engine and seek the help of a spe-  
cialist garage.  
Check the engine oil level, top up with oil if re-  
quired.  
Engine oil level too high  
illuminates together with  
Do not use any oil additives.  
or  
Consumption  
illuminates together with  
Message regarding the need to reduce the  
engine oil level  
Depending on driving style and operating conditions,  
the engine consumes some oil, up to 0.5 l/1000 km.  
Consumption may be higher over the next 5000 km.  
Check the engine oil level.  
Refilling  
The oil level is too high:  
Unscrew the cover of the engine oil filler opening.  
Top up the oil to the correct specification in 0.5 li-  
tre portions.  
Drive on, exercising appropriate caution.  
Seek the help of a specialist garage.  
Check the oil level.  
Screw on the cover of the engine oil filler opening.  
Engine oil level sensor impaired  
illuminates together with  
Specification  
Ask a specialist garage for the correct engine oil  
specification for your vehicle.  
or  
illuminates together with  
Message regarding the engine oil sensor  
If no oil of the correct specification is available, max.  
0.5 l of oil with the following specifications may be  
used until the next oil change:  
Drive on, exercising appropriate caution.  
Seek the help of a specialist garage.  
Petrol engines: VW 504 00, VW 508 00,  
ACEA C3, ACEA C5  
Diesel engines: VW 507 00, VW 509 00,  
ACEA C3, API CJ-4  
Coolant  
Coolant temperature gauge  
For vehicles without a particulate filter, VW 505 01  
can be optionally used.  
Changing  
Have the oil changed by a specialist garage.  
Troubleshooting  
Engine oil pressure too low  
flashes, lights up at the same time  
Engine, exhaust system and fuel › Coolant 177  
Troubleshooting  
A
Cold area  
Avoid high engine speed.  
Coolant level is too low  
B
Operating range  
illuminates together with  
C
High temperature range  
or  
illuminates together with  
Message concerning the required coolant  
check  
Checking the fill level and topping up  
Test conditions  
The vehicle is on a horizontal surface  
The engine is turned off and cooled  
Check the coolant level.  
If the coolant level is OK:  
Checking the level  
Check the fuse for radiator fan, replace if re-  
quired » page 187, Replacing a fuse.  
The fill level must be  
within the marked range.  
If the fuse is OK but the indicator light lights up  
again:  
If the fill level is below  
the mark  
, top up  
Stop driving! Seek the help of a specialist garage.  
the coolant.  
Coolant temperature too high  
illuminates together with  
or  
illuminates together with  
Report regarding the engine overheating  
NOTICE  
Danger of damage to the engine compartment!  
Stop driving.  
Stop the engine and allow it to cool.  
Drive on after the indicator light goes out.  
Do not top up the coolant above the marked area.  
The coolant could be forced out of the cooling sys-  
tem when heated.  
NOTICE  
Engine fault  
There must be a small quantity of coolant in the tank.  
Do not add coolant when the tank is empty.  
illuminates together with  
Stop driving! Seek the help of a specialist garage.  
or  
Refilling  
CAUTION  
Risk of scalding!  
illuminates together with  
Stop driving!  
Stop the engine and seek the help of a specialist  
The cooling system is pressurised.  
garage.  
Do not open the cap of the coolant expansion tank  
while the engine is warm. Let the engine cool  
down.  
There is no coolant of the correct specification  
available  
Place a wipe on the lid of the tank and carefully un-  
screw the lid.  
Refill with coolant of the correct specification.  
Top up with distilled or demineralised water.  
Have the correct coolant mixing ratio corrected by  
a specialist garage as soon as possible.  
Screw on the cap until it clicks into place.  
Another substance was used for topping up, other  
than distilled or demineralised water:  
Specification  
To refill the coolant additive use G12evo (TL 774 L).  
Have the coolant changed by a specialist garage.  
NOTICE  
It is not possible to top up with a sufficient amount  
of coolant  
Stop driving.  
Stop the engine and seek the help of a specialist  
Risk of damage to the cooling system and the en-  
gine!  
Adding coolant that does not conform to the correct  
specification can reduce the corrosion protection of  
the cooling system.  
garage.  
There is a loss of coolant  
Top up the coolant and seek the help of a specialist  
garage.  
178 Engine, exhaust system and fuel › Engine electronics  
If the filter is successfully cleaned, the indicator light  
Engine electronics  
goes off.  
or  
.
Troubleshooting  
If the indicator light  
or  
does not go off with-  
in 40 minutes, no filter cleaning was performed.  
Petrol engine control faulty  
illuminates  
Driving in emergency mode is possible - a  
noticeable reduction in engine performance may oc-  
cur.  
Continue driving, exercising appropriate caution,  
and seek the help of a specialist garage.  
Procedure for vehicles with petrol engines  
Drive at a speed of at least 80 km/h at engine  
speeds between 3000-5000 rpm.  
Release the accelerator pedal and let the vehicle  
roll with the gear engaged for a few seconds.  
Repeat this procedure several times.  
Continue driving, exercising appropriate caution,  
and seek the help of a specialist garage.  
Diesel engine control faulty  
flashes  
If the filter is successfully cleaned, the indicator light  
goes off.  
or  
.
Driving in emergency mode is possible - a noticeable  
reduction in engine performance may occur.  
If the indicator light  
or  
does not go off with-  
in 30 minutes, no filter cleaning was performed.  
Continue driving, exercising appropriate caution,  
and seek the help of a specialist garage.  
Continue driving, exercising appropriate caution,  
and seek the help of a specialist garage.  
Diesel preheating system faulty  
illuminates, or does not illuminate after the  
ignition is switched on  
Exhaust control system  
Troubleshooting  
Driving in emergency mode is possible - a noticeable  
reduction in engine performance may occur.  
Continue driving, exercising appropriate caution,  
and seek the help of a specialist garage.  
Emission control system faulty  
illuminates  
Driving in emergency mode is possible - a no-  
ticeable reduction in engine performance may occur.  
Particle filter  
Continue driving, exercising appropriate caution,  
Troubleshooting  
and seek the help of a specialist garage.  
Clogged particle filter  
illuminates together with  
Fuel filter  
Troubleshooting  
or  
illuminates together with  
Water in the diesel fuel filter  
illuminates together with  
Clean the filter.  
or  
When the indicator light is on, it must be as-  
sumed that fuel consumption will be higher, engine  
power will be reduced, and the START-STOPP func-  
tion will not be available.  
illuminates together with  
Continue driving, exercising appropriate caution,  
and seek the help of a specialist garage.  
Filter cleaning  
Radiator blinds  
Usage  
Conditions for cleaning  
The engine is warm.  
For vehicles with manual transmission, observe  
the gear recommendation shown in the display of  
the instrument cluster.  
The radiator blinds reduce emissions harmful to the  
environment and CO2-Emissions and saving fuel.  
Procedure for vehicles with diesel engines  
Drive at a speed of at least 60 km/h at engine  
speeds of at least 2000 rpm.  
Engine, exhaust system and fuel › Fuel filler flap 179  
If the range with the existing AdBlue® tank fill level  
drops to 0 km, it is not possible to start the engine.  
If possible, top up AdBlue® to the maximum level.  
Requirements for refilling  
Vehicle unlocked  
Troubleshooting  
If the display of the instrument cluster shows a mes-  
sage relating to the function restriction of the blinds,  
the maximum speed of the vehicle is limited to 160  
km/h.  
The cause may be ice or snow in the area around the  
blinds. After the ice or snow has thawed, the blinds  
are functional again.  
Stationary heating switched off  
Ignition off  
The vehicle is on a horizontal surface  
Should the impairment not be due to ice or snow,  
assistance from a specialist should be sought.  
Methods of refilling  
With the fuel nozzle at the petrol station  
With the refill bottle or from the canister  
At a specialist garage  
Fuel filler flap  
For refilling using refill bottles or canisters, we rec-  
ommend using refill bottles and canisters from ŠKO-  
DA original parts. The refill bottles are equipped with  
overfill protective function.  
Opening the fuel filler flap  
Press the flap and open  
it.  
Refilling  
Open the tank flap.  
Turn the tank cap in  
the direction of the ar-  
row and remove it.  
Place the tank cap on  
the tank flap.  
Refill AdBlue®.  
The AdBlue® tank is full  
when the fuel nozzle  
AdBlue  
switches off or as soon  
Regulations  
as no more AdBlue®  
Only use AdBlue® that corresponds with the ISO  
22241-1 standard. Do not add additives to AdBlue®.  
AdBlue® is a registered trademark of VDA and is also  
popular as AUS 32 (Aqueous Urea Solution) or DEF  
(Diesel Exhaust Fluid).  
flows out of the refill bottle. Do not continue refilling.  
Place the tank cap on the filler neck and turn it in  
the opposite direction to the arrow until it clicks  
into place.  
Close the tank flap and click into place.  
Before starting the engine, leave the ignition on for  
30 seconds to allow the system to detect the refill-  
Functionality  
ing.  
To reduce pollutant emissions, a urea solution is au-  
tomatically injected into the exhaust system - AdBl-  
ue®.  
AdBlue® freezes at temperatures below -11 C. The  
system function is ensured by automatic heating.  
NOTICE  
Risk of damage to the system for injecting AdBlue®  
in to the exhaust system!  
Do not exceed the maximum refill quantity speci-  
fied in the instrument cluster.  
®
The service life of AdBlue is 4 years. If the tank  
contents are not consumed within this period, have  
them replaced by a specialist garage. When top-  
ping up, do not use AdBlue® that is past its expiry  
date.  
Checking the fill level and topping up  
Checking the level  
The AdBlue® level is monitored automatically.  
The range with the existing AdBlue® tank fill level as  
well as the indication of the minimum and maximum  
AdBlue® top up quantity can be viewed in the driving  
data in the instrument cluster display under the  
Troubleshooting  
AdBlue®-Level too low  
or or illuminates  
menu item  
.
180 Engine, exhaust system and fuel › Petrol  
Refill AdBlue®.  
Prescribed petrol 95 / min. 92 or 93 RON / ROZ  
We recommend using petrol 95 ROZ.  
AdBlue®-system malfunction.  
Optionally, the petrol 92 or. 93 ROZ can be used  
(slight power loss, a slightly increased fuel consump-  
tion).  
or  
or  
illuminates  
Seek the help of a specialist garage.  
In an emergency, 91 RON petrol may be used (low  
power loss, slightly increased fuel consumption).  
Technical data  
Specified petrol is unleaded, min. 95 RON / ROZ  
Use min. 95 ROZ petrol.  
AdBlue®-tank filling level is about 12 litres.  
Using higher octane petrol than 95 RON may result  
in improved performance and lower fuel consump-  
tion.  
Petrol  
In an emergency 91. 92 or. 93 RON may be used  
(low power loss, slightly increased fuel consump-  
tion).  
What you should be mindful of  
DANGER  
Risk of death!  
Fuel and fuel vapours are explosive.  
Prescribed petrol 98 / (95) RON / ROZ  
We recommend using petrol 98 ROZ.  
NOTICE  
95 RON petrol may be used as an option (low power  
loss, slightly increased fuel consumption).  
Risk of serious damage to the engine and the ex-  
haust system!  
In an emergency 91. 92 or. 93 RON may be used  
(low power loss, slightly increased fuel consump-  
tion).  
Never run the fuel tank completely empty!  
If you would like to operate your vehicle in a country  
other than that intended for vehicle operation,  
please contact a ŠKODA Partner. They will let you  
know whether a suitable fuel is offered in the associ-  
ated country.  
Additive  
NOTICE  
Risk of damage to the engine and the exhaust sys-  
tem!  
Do not use petrol containing metal-based addi-  
tives, e.g. manganese, iron, lead, and do not use, for  
example, any LRP-petrol - lead replacement petrol.  
Do not add any additional additives to the petrol in  
accordance with EN 228.  
If petrol is not used in accordance with EN 228, we  
recommend obtaining information from a specialist  
company regarding the possible use of petrol addi-  
tives approved by ŠKODA AUTO.  
Regulations  
Standards  
Petrol must comply with European standard EN 228  
(in Russia, GOST 32513-2013).  
Only use unleaded petrol that contains max 10% bi-  
oethanol (E10).  
We recommend using petrol with additives,  
which is available at petrol stations at the petrol  
pumps.  
Requirements for refuelling  
Octane number  
Use the petrol with the octane number prescribed  
for your vehicle.  
Vehicle unlocked  
Stationary heating switched off  
Ignition off  
Petrol with an octane number that is one higher than  
the one prescribed for your vehicle can be used  
without restriction.  
Refilling  
NOTICE  
Risk of damage to the engine and the exhaust sys-  
tem!  
Open the tank flap.  
When petrol with a lower than the prescribed oc-  
tane is used, only continue driving at mid-range en-  
gine speeds and with minimal strain on the engine.  
Refuel using petrol of the prescribed octane num-  
ber as soon as possible.  
Do not use petrol with an octane number that low-  
er than 91!  
Engine, exhaust system and fuel › Diesel 181  
Turn the tank cap in  
the direction of the ar-  
row and remove it.  
Diesel  
What you should be mindful of  
Place the tank cap on  
the tank flap.  
DANGER  
Risk of death!  
Fuel and fuel vapours are explosive.  
Insert the fuel nozzle  
into the fuel filler neck  
up to the stop and re-  
fuel.  
Do not continue refuel-  
ling after the fuel noz-  
NOTICE  
Risk of serious damage to the engine and the ex-  
haust system!  
Never run the fuel tank completely empty!  
zle switches off.  
Remove the fuel nozzle and put it back on the pet-  
rol pump.  
Place the fuel cap on the fuel filler neck and turn it  
in the opposite direction to the arrow until it clicks  
into place.  
If you would like to operate your vehicle in a country  
other than that intended for vehicle operation,  
please contact a ŠKODA Partner. They will let you  
know whether a suitable fuel is offered in the associ-  
ated country.  
Close the tank flap and click into place.  
Regulations  
Standards  
Troubleshooting  
The diesel fuel must comply with European standard  
EN 590 (in Russia, GOST 32511-2013 or GOST R  
55475-2013).  
If fuel other than unleaded petrol has been used as  
per standards applicable to your vehicle  
Neither start the engine nor switch on the ignition.  
Seek the help of a specialist garage.  
Only use a diesel fuel that contains a maximum of 7  
% biodiesel (B7).  
We recommend using diesel with additives,  
which is available at petrol stations at the petrol  
pumps.  
Technical data  
The fuel prescribed for your vehicle is indicated on a  
sticker on the inside of the fuel filler flap.  
Operation in different weather conditions  
Only use a diesel fuel according to the current or the  
expected weather conditions.  
Unleaded petrol  
A
B
Additive  
Organic share as a  
percentage  
NOTICE  
Risk of damage to the engine and the exhaust sys-  
tem!  
Do not use RME biofuel, even as a diesel fuel addi-  
tive.  
Do not add any additional additives to the diesel in  
accordance with EN 590.  
If diesel is not used in accordance with EN 590, we  
recommend obtaining information from a specialist  
company regarding the possible use of diesel addi-  
tives approved by ŠKODA AUTO.  
Tank capacity for vehicles with front-wheel drive  
About 45 litres or 50 litres (depending on engine  
type), of which 6 litres are a reserve.  
For natural gas vehicles, the content of the petrol  
tank is approximately 9 litres.  
Requirements for refuelling  
Tank capacity for vehicles with all-wheel drive  
About 55 litres, including a reserve of approx. 6 li-  
tres.  
Vehicle unlocked  
Stationary heating switched off  
Ignition off  
illuminates - the fuel level has reached the re-  
serve area.  
182 Engine, exhaust system and fuel › CNG (compressed natural gas)  
Refilling  
Diesel  
A
B
Organic share as a  
percentage  
Misfuelling protection  
The fuel filler neck on diesel vehicles may be equip-  
ped with a misfuelling protection device.  
In some countries, the diameter of the diesel fuel  
nozzle may be identical to that of the petrol nozzle.  
Before driving in these countries, have the protec-  
tion device removed by a specialist garage.  
Refilling  
Tank capacity for vehicles with front-wheel drive  
About 45 litres or 50 litres (depending on engine  
type), of which 6 litres are a reserve.  
Open the tank flap.  
Turn the tank cap in  
the direction of the ar-  
row and remove it.  
Place the tank cap on  
the tank flap.  
Insert the fuel nozzle  
into the fuel filler neck  
up to the stop and re-  
fuel.  
Tank capacity for vehicles with all-wheel drive  
About 55 litres, including a reserve of approx. 6 li-  
tres.  
illuminates - the fuel level has reached the re-  
serve area.  
Do not continue refuel-  
ling after the fuel noz-  
CNG (compressed natural gas)  
What you should be mindful of  
zle switches off.  
Remove the fuel nozzle and put it back on the pet-  
rol pump.  
Place the fuel cap on the fuel filler neck and turn it  
in the opposite direction to the arrow until it clicks  
into place.  
WARNING  
Natural gas is highly explosive and highly flammable.  
WARNING  
Risk of death, explosion or fire!  
Do not ignore the smell of gas in the vehicle or  
when refuelling.  
The natural gas tanks in the vehicle must not be ex-  
posed to undesirable heat sources.  
Do not enter the vehicle when refuelling with natu-  
ral gas. Electrostatic discharges may occur when  
entering the vehicle. If the fuelling nozzle of the re-  
fuelling system is subsequently touched, sparks  
may form and a fire may break out.  
Close the tank flap and click into place.  
Troubleshooting  
If fuel other than diesel has been used as per appli-  
cable standards  
Neither start the engine nor switch on the ignition.  
Seek the help of a specialist garage.  
WARNING  
The diesel nozzle cannot be inserted correctly into  
Touching the floor of the vehicle or an accident may  
damage the natural gas containers. If damaged natu-  
ral gas tanks are refuelled, they can burst and cause  
serious or fatal injuries!  
Ensure a gas system test is carried out immediately  
by a specialist company.  
Technical data  
Do not refuel using natural gas until a gas system  
test has been carried out.  
The fuel prescribed for your vehicle is indicated on a  
sticker on the inside of the fuel filler flap.  
NOTICE  
Risk of damage to the engine and the exhaust sys-  
tem.  
Do not use Liquefied Natural Gas (LPG), Liquefied  
Petroleum Gas (LPG) or Hythane (hydrogen/meth-  
ane mixture).  
Engine, exhaust system and fuel › CNG (compressed natural gas) 183  
Natural gas operation display  
Regulations  
illuminates  
Automatically switching over from natural gas  
mode to petrol mode  
The vehicle automatically switches from natural gas  
to petrol, for example, if the following situations oc-  
cur.  
Variants of the CNG sticker  
in natural gas vehicles .  
With an empty natural gas tank or insufficient  
pressure in the tank.  
After natural gas refuelling - the fuel system of the  
vehicle determines the quality of natural gas.  
At very low ambient temperatures.  
Gas gauge  
Position of the sticker  
Regular gas system checks  
On natural gas-powered vehicles regular gas system  
checks must be carried out at a specialist workshop.  
The vehicle operator is responsible for ensuring  
these tests are carried out properly.  
For new cars, this is after 4 years and then every 2  
years  
A
The natural gas supply has reached the reserve  
area.  
Check the gas system for leaks and carry out an  
examination of gas containers  
WARNING  
Danger of remaining in traffic.  
After the indicator light illuminates Fill up with  
petrol as soon as possible.  
Never fully empty the petrol tank.  
Check the filler cap  
Check the condition of fuel filler tubes and the  
sealing ring in the fuel filler tubes, and clean sealing  
ring if necessary  
Track the range with natural gas in the drive data  
menu item » page 66. Plan to fill up with natural  
gas in good time.  
Lifetime of the containers  
The lifetime of the natural gas containers is max. 20  
years.  
Every six months, to ensure the correct function-  
Ensure the gas tanks are replaced at the appropri-  
ate time.  
ing of the fuel system, it is recommended that the  
fuel tank for petrol should be run down until the  
warning light comes on. run empty.  
Indicates the natural gas system test.  
illuminates  
Notification regarding the remaining days until  
the natural gas system is checked  
Requirements for refuelling  
Ensure the test is carried out by a specialist com-  
pany.  
Vehicle unlocked  
Stationary heating switched off  
Ignition off  
NOTICE  
If the natural gas system is not tested by the due  
date, the natural gas drive will not be available in  
your vehicle.  
Refilling  
Open the tank flap.  
Functionality  
A natural gas vehicle also has a petrol en-  
gine » page 180,  
184 Engine, exhaust system and fuel › CNG (compressed natural gas)  
Open doors and the boot lid to ventilate the vehi-  
cle sufficiently.  
Do not continue to drive if the odour persists.  
If it is not possible to drive a vehicle with a gas leak  
out of an enclosed area (e.g. tunnel, underpass, ga-  
rage, ferry etc.), call the emergency services imme-  
diately.  
Ensure a gas system test is carried out immediately  
by a specialist company.  
Remove the cap A  
from the natural gas  
filler neck.  
Plug the coupling of  
the refuelling system  
onto the filler neck and  
start refuelling with  
natural gas and while  
doing so, follow the in-  
structions given on the  
refuelling system.  
Technical data  
The refuelling system stops the refuelling process  
automatically when the tank is full.  
The fuel prescribed for your vehicle is indicated on a  
After releasing the  
coupling of the refuel-  
ling system, check  
sticker on the inside of the fuel filler flap.  
whether the sealing  
ring B is stuck in the  
filler neck A .  
If the sealing ring has  
slipped on the connec-  
tor, reinsert it into the  
filler neck.  
Place the cap on the filler neck.  
Close the tank flap and click into place.  
CNG (compressed natural gas)  
The fuel tank is built with a capacity of approximate-  
ly 17.5 kg CNG.  
The natural gas refuelling systems have an overfill  
protection with a dependence to the outdoor tem-  
perature. With very high outside temperatures, it  
may not be possible to fully refuel the natural gas  
tank.  
If the car is parked directly after a refuelling op-  
eration, on restart the pointer of the gas gauge may  
not show exactly the same level as immediately after  
the filling process. This is not a leak in the system,  
but a reduction in pressure due to the cooling of the  
gas in the natural gas container after refuelling.  
Troubleshooting  
Unknown refuelling system  
Natural gas refuelling may vary from station to sta-  
tion. If refuelling with natural gas at a station is unfa-  
miliar to you, get someone to instruct you or allow  
the fuelling operation to be carried out by the station  
staff.  
Gas leakage  
If a gas leak is suspected (perceptible odour), pro-  
ceed as follows.  
Stop the vehicle.  
Switch off the ignition.  
Extinguish cigarettes, switch off spark-producing  
or incendiary items and remove them from the ve-  
hicle.