Polo BM - 1.2 TDI - CFWA - Diagnostic PDF (Tips for me)

Hello everyone,

I wanted to find out if my planned approach for the aforementioned vehicle is okay, or if there's anything else I can do. I only have an OBD II analyzer, and I always have to borrow a proper tester (you always know someone who has one...).
Therefore, I would like to know quickly how to proceed.

A Polo car has the following history of problems:

- The boost pressure sensor was defective (P0238)
- Operated for several thousand kilometers in emergency mode.
- now it's permanently unavailable due to... DPF (Error: P2463)

The boost pressure sensor has been replaced -> The system is now in limp mode, but there are positive pressure readings in front of the engine again (previously negative), and you can hear the turbo working again.

The hope was that the DPF would regenerate itself, but after 200 km on the highway, nothing happened.

I wanted to take a look at the battery management system (BMS) to see what the state of charge is.
- Loading coefficient
- Differential pressure

Since I only have brief access to a tester every two weeks:
- What else can I watch?
- Is there a guide regarding forced regeneration for the aforementioned [item/device]? Engine?
- Is there another way to "pre-clean" a DPF to reduce the amount of soot it contains?
- How can I adapt, if necessary? Used filters from online marketplaces? - If prolonged driving in limp mode has damaged the DPF.

Even though I haven't received a response, here are the results.

- DPF overloaded with a 50/50 mixture (measured and calculated).
- DPF cleaner is injected into the DPF through the differential pressure sensor connection (1 can).
- DPF re-initialized -> Result: Measured loading 39 grams.
- Regeneration initiated during transit.

200 kilometers later, the start/stop function is working again.

Ash content?