The recurring fault code is,
2A20 Particulate trap. Faulty Signal - always the same
You can see from the Engine speed that at the first good attempt to raise engine speed rapidly the Pressure sensor registers at best 15 hpa which I believe is 15 millibar ?? -- Next to nothing ?
If you look at the Blue Line I have drawn then you can see RPM is falling at that point, DPF pressure hit Zero then defaults to 65535 (which is FFFF in Hexidecimal). That is the point at which the DTC & Limp home is set. Has always followed the same pattern.
I will provide Scoped Evidence, will have to collect it as the last lot disappeared, and I can assure you that the Voltage signal from the pressure sensor does not spike up to cause that 65535 hpa reading, it is in my view a Substituted value from the ECU. Ground & 5v Ref to the sensor does not flinch either.
The VIn is YV1CT714661297758
You should have at least 5 mbar at idle. If there is no pressure then fault is logged. Cause could be hole in DPF.
I'm thinking the same as you, has someone removed the internals of the DPF and not mapped it out ?
I may at some point put a resistor between the 5v Ref and the signal wire to artificially hold it up at 6 millibar at idle. Alternatively, I wonder if I was to Adapt the pressure sensor with a 6mb vacuum applied to it, would it allow me ?
What DTC's then manifest at partial or full load (if any) will be an education and an insight into its strategy, and justify the expense of a replacement.