Today I came across my car showing the message “DPF regeneration in progress”
when it pops up the engine isn’t idle and engine noise increases.
What causes it? What you should do when the message pops up?
In: 9
The note changes because it is delaying the burn of the diesel, so it leaves the cylinder head still burning.
Normally it would be injecting earlier, so it can do as much burning and expansion in the cylinder, but the regens will delay that or add a little diesel after the main squirt.
The diesel burning through the exhaust increases the exhaust gas temperatures, and will get the DPF to 800degC / 1500F which should be hot enough to burn the soot.
That’s also why the sound of the exhaust changes too.
When it does happen, carry on driving as normal, or if you get the chance, cruise at a steady speed and it’ll stop after maybe 5-10 mins and the DPF soot filter in the exhaust should be cleaner.
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