Engine, exhaust system and fuel -> CNG (compressed natural gas) for Your Skoda Octavia 4 Door Fourth Generation (2021-2026)

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.