Dpf Differential Pressure Sensor - Mazda 6 Facelift 2005 Training Manual

Engine

DPF Differential Pressure Sensor

•
The DPF differential pressure sensor detects the pressure difference in the exhaust gas
flow upstream and downstream of the DPF. The pressure difference is a measure for the
soot amount accumulated in the filter (i.e. the higher the pressure difference, the higher
the soot amount). The sensor is located in the engine compartment at the bulkhead and
is connected to the upstream and downstream measuring point of the DPF by means of
pressure lines.
•
The differential pressure sensor consists of a pressure chamber with integrated semi-
conductor element. The electrical resistance of the element varies, when its shape
changes due to exposure to pressure.
1 Temperature correction sensor
2 DPF differential pressure sensor
3 Connection for reference pressure
Service Training Mazda6 Facelift
4 Connection for high pressure
5 Oxidation catalytic converter and DPF
6 Pressure lines
Diesel Engines
M6FL_01047
01-63