Engine Diesel Engines
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.
M6FL_01047
1 Temperature correction sensor 4 Connection for high pressure
2 DPF differential pressure sensor 5 Oxidation catalytic converter and DPF
3 Connection for reference pressure 6 Pressure lines
Service Training Mazda6 Facelift 01-63
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