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5.4 DPF
The Diesel Particle Filter (DPF) function manages DPF regeneration, DPF component
replacement teach-in, and DPF teach-in after replacing the engine control module (ECM).
The ECM monitors driving style and selects a suitable time to employ regeneration.
Vehicles driven a lot at idling speed and low load will attempt to regenerate earlier than
vehicles driven more with higher load and speed. For regeneration to take place, a
prolonged high exhaust temperature must be obtained.
In the event of the car being driven in such ways that regeneration is not possible, i.e.,
frequent short journeys, a diagnostic trouble code will eventually be registered in
addition to the DPF light and “Check Engine” indicators displaying. A service regeneration
can be requested in the workshop using the diagnostic tool.
DPF regeneration is used to clear PM (Particulate Matter) from the DPF filter through
continuous combustion oxidation mode (such as high-temperature heating combustion,
fuel additive or catalyst reduce PM ignition combustion) to stabilize the filter
performance.
DPF regeneration may be performed in the following cases:
The exhaust back pressure sensor is replaced.
The PM trap is removed or replaced.
The fuel additive nozzle is removed or replaced.
The catalytic oxidizer is removed or replaced.
The DPF regeneration MIL is on and maintenance is performed.
The DPF regeneration control module is replaced.
The operation guidelines of the DPF function are shown as below:
