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Particulate filter
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 indication
is displayed to the driver:
Particulate filter: cleaned
while the vehicle is moving. See
Manual.
The particulate filter needs cleaning (regener-
ation).
Regeneration of the petrol and diesel partic-
ulate filter
1)
Requirements for the regeneration journey:
the engine is at operating temperature.
●
Drive at a speed of between 50120 km/h
(31-75 mph). This increases the temperature
›››
and burns the soot in the filter
●
Consider the legal speed limits as well as the
recommended gears.
●
End the regeneration journey once the con-
trol warning lamp has gone out.
If the warning lamp stays on after 30 minutes
of running in regeneration mode, have a speci-
alised workshop repair the fault.
1)
Except 2.0l and 2.5l TSI petrol engines.
Engine management and emissions control system
Fuel and exhaust gas cleaning
Regeneration of the particulate filter (only
for 2.0l and 2.5l TSI engines)
Requirements for the regeneration journey:
the engine is at operating temperature.
●
Drive at a speed of at least 80 km/h
›››
page 301.
●
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.
●
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.
page 301.
WARNING
Always adjust your speed to suit the weather
conditions, roads, braking distance and traf-
fic if the particulate filter is in its regenera-
tion phase. Route recommendations should
never make you disregard each country's
specific traffic regulations.
NOTICE
●
When the exhaust system detects that the
particulate filter is close to saturation, the
self-cleaning function of this system recom-
mends optimal driving for this function.
●
Due to the high temperatures caused by
the regeneration of the particulate filter, it is
possible that the radiator fan will activate af-
ter stopping the engine, even it its operating
temperature has not been reached.
●
Noise, smells and high idle speeds can oc-
cur during regeneration.
●
Always use the correct engine oil and the
correct fuel to make sure the useful life of
the particulate filter is not affected. Also
avoid making short trips all the time.
Troubleshooting
Fault in the emissions control system
The indicator lamp lights up yellow.
Reduce speed and drive carefully to the near-
est specialised workshop to have the engine
checked.
Combustion failures that could damage
the catalytic converter
The control lamp flashes yellow.
301
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