Seat LEON 2019 Owner's Manual page 333

 It lights up
Diesel engine preheating system.
The engine can be started straight away when the
lamp switches off.
 Flashes
Fault in the diesel engine management.
Have the engine checked as soon as possible by a
specialised workshop.
Note
While the control lamps ,
 
on, there might be faults in the engine, fuel
consumption may go up and the engine
might lose power.
Catalytic converter
To maintain the useful life of the catalytic
converter
Only use unleaded petrol with petrol en-
●
gines.
Never run the fuel tank dry.
●
When changing or adding engine oil, do not
●
›››
exceed the necessary amount
Topping up the engine oil.
Never tow the vehicle to start it, use jump
●
›››
leads if necessary page 47.
Checking and refilling levels
If you should notice misfiring, uneven running
or loss of power when the car is moving, have
the vehicle inspected by a specialised work-
shop. In general, the emissions warning lamp
will light up when any of these symptoms

occur. If this happens, any unburnt fuel can
enter the exhaust system and escape into the
atmosphere. The catalytic converter can also
be damaged by overheating.
CAUTION
Never run the fuel tank completely dry be-
cause an irregular fuel supply can cause
, or are
 
ignition faults. This allows unburnt fuel to
enter the exhaust system, which could
cause overheating and damage the cata-
lytic converter.
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.
Particulate filter
page 337,
3 Applies to: vehicles with petrol or diesel partic-
ulate filters
The particulate filter eliminates most of the
soot from the exhaust gas system. Under nor-
mal driving conditions the filter cleans itself. If
the filter does not clean itself (e.g. if short
journeys are made continuously), it becomes
blocked with soot and the following indica-
tion is displayed to the driver:

late filter: cleaned while the vehi-
cle is moving. See Manual.
ulate filter needs cleaning (regeneration).
Regeneration of the petrol particulate fil-
ter (only for 2.0l TSI engines)
Requirements for the regeneration journey:
the engine is at operating temperature.
Drive at a speed of at least 80 km/h
●
Completely remove your foot from the ac-
●
celerator pedal for a few seconds to let the
vehicle roll with the gear engaged.
Repeat this procedure (accelerate and let
●
roll) until the control lamp turns off.
This procedure involves an autonomous par-
ticulate filter cleaning process and may take
some time.
If the warning lamp does not turn off, go im-
mediately to a specialised workshop to repair
the fault.
Regeneration of the petrol (except the TSI
2.0l engine) and diesel particulate filter
Requirements for the regeneration journey:
the engine is at operating temperature.
Particu-
The partic-
›››
»
331