Hello there , remembered this & copied it it for you
For the particle filter to be regenerated, an exhaust temperature of approximately 600 °C is required downstream
of the filter. This is achieved via various engine operations, such as throttling, changed fuel injection, glow plug
activation.
Regeneration can be triggered in a number of ways:
▪ Used fuel volume,
▪ Time that engine has been running.
▪ Distance driven since last regeneration.
▪ Differential pressure across the particle filter or calculated particle weight in the filter.
▪ Start in the workshop using the diagnostic tool.
▪ Particle level in the filter calculated by the engine control module (ECM). What soot
weight each level corresponds to varies between different vehicle variants. Particle levels
are given below translated into soot weights (grams), and what effect they have.
With that in mind there are 5 different levels or circumstances in relation to the DPF based on the calculated weight of soot in the filter. Note that 2.0l and FWD 2.4l have the same Catalytic Converter/DPF combo installed straight off the back of the turbo whereas AWD 2.4 have a separate DPF installed under the floor of the vehicle. Below are the explanation of each level from VIDA.
DPF Soot Levels
Level 1: Engine control module (ECM) starts combustion of soot particles in the particle filter during highway driving.
Level 2: Engine control module (ECM) starts combustion of soot particles in the particle filter during normal driving.
Level 3: A text message, Soot filter full, is sent to the Driver information module (DIM), and the control module sets a DTC.
Level 4: Engine control module (ECM) can no longer start combustion of soot particles of its own initiative. A further text message, Engine system service required, is sent to the Driver information module (DIM), and another fault code is sent.
Level 5: More than 100 g soot . Combustion of soot particles cannot be started using the diagnostic tool.
Engine--Particle Filter----Level 1----Level 2----Level 3----Level 4----Level 5
2.0------ccDPF-----------NA--------27g---------32g------36g-------100g
2.4------ccDPF----------24g--------27g--------32g-------36g------100g
2.4-------ufDPF----------28g-------30g---------40g------45g-------100g
My own v70 2.4D gets a weekly run at 60 -65 MPH for about 30 mins on the motorway , this so far has OK . I am an MOT tester & see many , many diesels that potter around town doing very shorts journeys , causing blockages & visible smoke . I always ask presenters to "thrash " the engine on te nearby motorway to help clean the exhaust & aid the emission test ( saves me bloody hours ! )
Hope this helps
