Dpf (Diesel Particulate Filter); Particulate Filter Clogged - Alfa Romeo 147 Owner's Manual

DPF (Diesel Particulate Filter)

(only for versions/
markets where applicable)
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.

Particulate filter clogged

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).
185