Alfa Romeo 147 Benutzeranleitung

It is a mechanical filter, fitted in the ex-

haust system, which traps the carbon parti-
cles present in the exhaust gases of diesel
engines.

The filter function is to eliminate almost

completely the emissions of carbon particles,
in accordance with the current/future reg-
ulations.

During normal use of the car, the engine

control unit records a series of data con-
cerning the use (time, type of road, tem-
perature reached, etc.) and calculates the
quantity of particulate in the filter.

As this filter is an accumulating system

which must be regenerated (cleaned) burn-
ing the carbon particles, the regeneration
procedure is managed automatically by the
engine control unit according to the filter con-
ditions and the car using conditions. During
the filter regeneration the following phe-
nomena may occur: raising of idling, acti-
vation of electric fan, limited growth of
smoke level, high temperature at the ex-
haust.

These situations must no be considered as

faults and do not affect the car performance
and the environment.

When the particulate filter is clogged, the

instrument cluster 

h warning light

(on some versions the symbol 

h is

displayed) turns on. In this case you are
advised to keep the car travelling until the
h warning light goes off (or the sym-

bol

h on the display goes off).

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