2020-2026 Cupra Leon 4 Door Practical tips -> Engine management and emissions control system User Manual
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Practical tips -> Engine management and emissions control system for Your Cupra Leon 4 Door First Generation (2020-2026)

Practical tips  
CAUTION  
It lights up  
Engine management and  
emissions control system  
  
Fuels high percentage of ethanol, e.g.  
Fault in the petrol engine management.  
Have the engine checked as soon as possible by a spe-  
cialised workshop.  
E30 - E100 button must not be used. The  
fuel system would be damaged.  
Introduction  
A single refuelling with leaded fuel or  
When the ignition is switched on, the  (Electronic  
Power Control) lights up and should go off once the  
engine has started.  
other metal additives entails a permanent  
deterioration of the effectiveness of the  
catalytic converter.  
WARNING  
Due to the high temperatures reached by  
the exhaust gas scrubbing system, you  
should not park your vehicle near a surface  
that can catch fire easily. Fire hazard!  
Only use fuel additives that have been  
Note  
approved by SEAT. The products that con-  
tain substances to increase the octane rat-  
ing or decrease knocking may contain met-  
al additives that damage the engine and  
catalytic converter. This type of products  
must not be used.  
While the indicator lamps , or  are  
on, there might be faults in the engine, fuel  
consumption may go up and the engine  
might lose power.  
Do not apply wax underneath the vehicle  
around the area of the exhaust system: Fire  
hazard!  
Do not use fuels shown in the pump as  
Catalytic converter  
containing metals. LRP (lead replacement  
petrol) fuels contain high concentrations of  
metal additives. Risk of engine damage!  
Control lamps  
To maintain the useful life of the catalytic  
converter  
It lights up  
High engine speed and full throttle can  
damage the engine when using petrol with  
an octane rating lower than the correct  
grade for the engine.  
Only use unleaded petrol with petrol en-  
gines.  
Fault in the emission control system.  
Reduce speed and drive carefully to the nearest speci-  
alised workshop to have the engine checked.  
Never run the fuel tank dry.  
When changing or adding engine oil, do  
Flashes  
Note  
not exceed the necessary amount  
›››  
Fuel with an octane rating higher than  
Combustion failures that can damage the catalytic  
converter.  
Reduce speed and drive carefully to the nearest speci-  
alised workshop to have the engine checked.  
page 321, Topping up the engine oil.  
the one required by the engine can be  
used.  
Never tow the vehicle to start it, use jump  
leads if necessary page 54 .  
›››  
In countries in which there is no sulphur-  
free fuel, it is also allowed to use low sul-  
phur content fuel.  
If you should notice misfiring, uneven run-  
ning or loss of power when the car is moving,  
have the vehicle inspected by a specialised  
workshop. In general, the emissions warning  
It lights up  
Particulate filter blocked page 315 .  
›››  
314  
Checking and refilling levels  
lamp will light up when any of these symp-  
toms occur. If this happens, any unburnt fuel  
can enter the exhaust system and escape in-  
to the atmosphere. The catalytic converter  
can also be damaged by overheating.  
vehicle is moving. See Manual. The  
particulate filter needs cleaning (regenera-  
tion).  
Consider the legal speed limits as well as  
the recommended gears.  
End the regeneration journey once the  
control warning lamp has gone out.  
Regeneration of the particulate filter (only  
for 2.0l TSI engines)  
If the warning lamp stays on after 30 minutes  
of running in regeneration mode, have a  
specialised workshop repair the fault.  
CAUTION  
Requirements for the regeneration journey:  
Never run the fuel tank completely dry be-  
cause an irregular fuel supply can cause ig-  
nition faults. This allows unburnt fuel to en-  
ter the exhaust system, which could cause  
overheating and damage the catalytic con-  
verter.  
the engine is at operating temperature.  
WARNING  
Drive at a speed of at least 80 km/h  
›››  
Always adjust your speed to suit the weath-  
er conditions, roads, braking distance and  
traffic if the particulate filter is in its regen-  
eration phase. Route recommendations  
should never make you disregard each  
country's specific traffic regulations.  
Completely remove your foot from the ac-  
celerator pedal for a few seconds to let the  
vehicle roll with the gear engaged.  
Consider the legal speed limits as well as  
the recommended gears.  
For the sake of the environment  
Even when the emission control system is  
working perfectly, there may be a smell of  
sulphur from the gases on occasions. This  
depends on the sulphur content of the fuel  
used. This can quite often be avoided by  
changing to another brand of fuel.  
Repeat this procedure (accelerate and let  
roll) until the control lamp turns off.  
CAUTION  
This procedure involves an autonomous par-  
ticulate filter cleaning process and may take  
some time.  
When the exhaust system detects that  
the particulate filter is close to saturation,  
the self-cleaning function of this system  
recommends optimal driving for this func-  
tion.  
If the warning lamp does not turn off, go im-  
mediately to a specialised workshop to repair  
the fault.  
Due to the high temperatures caused by  
Particulate filter  
the regeneration of the particulate filter, it  
is possible that the radiator fan will activate  
after stopping the engine, even it its oper-  
ating temperature has not been reached.  
The particulate filter eliminates most of the  
soot from the exhaust gas system. Under  
normal driving conditions the filter cleans it-  
self. If the filter does not clean itself (e.g. if  
short journeys are made continuously), it be-  
comes blocked with soot and the following  
indication is displayed to the driver: Par-  
ticulate filter: cleaned while the  
Regeneration of the petrol (except the TSI  
2.0l engine) particulate filter  
Requirements for the regeneration journey:  
Noise, smells and high idle speeds can  
the engine is at operating temperature.  
occur during regeneration.  
Always use the correct engine oil and the  
Drive at a speed of between 50-120 km/h  
(31-75 mph). This increases the temperature  
and burns the soot in the filter  
»
correct fuel to make sure the useful life of  
.
›››  
315  

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