Hi everyone,

I have a question and I'm hoping someone here can explain what's going on. The car is a 2016 2.0 TDI (CRLB, 150 HP) with a DSG gearbox.

I monitor the DPF status using an app and I've noticed strange, more frequent regenerations lately.

Previously, the filter would fill up to 25 grams, which corresponds to 100%. Now, it sometimes fills up to only 60% and immediately jumps straight to 100%, triggering a regeneration.

Sometimes I turn the car off at 60%, and the next time I start it up, a regeneration kicks off right away. I wanted to ask: is this filter already in need of cleaning?

Or could one of the pressure sensors need replacement?

Deleting the DPF is not an option for me—I'd rather sell the car first.

Overall, I checked the tailpipe and it's perfectly clean; the car doesn't smoke or emit soot.

Thanks in advance, and please, no harsh comments. I know I'm not using the car in the right way for a diesel, which is why I plan to switch to a petrol car in the near future.

If you’re switching off the motor and the fan still runs for a few minutes, that shows two (possible ) issues.

The first and most normal is your turbo is very hot and needs cooling down - just run at tick over for a couple of minutes to safely cool it down.

The other and more problematic issue is you’ve switch off when a DPF regen is in progress.

This causes 2 (or more?) issues. One the added diesel injected waters down your engine oil. Not by much but if this is happening every day then it will increase over time.

The 2nd and one you will notice. On restarting the engine will start a regen again - running at 1,00 rpm instead of about 800 rpm is a good sign.

You need to run a longer distance 40km or so on a fast road every 7/10 days this should (provided you DPF is in need of work) resolve your problems.

I had this engine in my last Passat Estate, ran it for about 138,000kms before trading it to my Superb.

As my work was about 35km on the motorway both ways never had an issue