Hi all im new to the forum after just buying a 1.6 roomster for a run around, within a the first week the following problem has flagged up on VCDS.

ive removed the oxygen sensor in the engine bay bought some of wynns dpf cleaner used a pressurized container to fill the dpf up,im getting lots of foam out of the back exhaust with lots of muck but it will not regen or rev beyond 2500 revs and still coming up with the following info,if anyone who has experience of this any advice would be greatly appreciated 

Saturday,04,March,2023,20:40:45:00009
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 20.4.2.0 (x64)
Data version: 20200730 DS317.0
www.Ross-Tech.com

VIN: TMBPL65J6C7007833   License Plate: 
Mileage: 129220km-80293mi   Repair Order: 

                Address 01: Engine       Labels: 03L-906-023-CAY.clb
Control Module Part Number: 03L 906 023 LN    HW: 03L 906 023 LK
  Component and/or Version: R4 1.6l TDI   H33 9983
           Software Coding: 00114016000500080000
            Work Shop Code: WSC 13765 031 00123
              ASAM Dataset: EV_ECM16TDI02103L906023LN 003017 (SK25)
                       ROD: EV_ECM16TDI02103L906023LK_SK25.rod
                      VCID: 7DF14CF3ECF1676E78-8028
1 Fault Found:

16848 - Diesel Particulate Filter 
          P2458 00 [173] - Regeneration Duration
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 129223 km
                    Date: 2023.03.04
                    Time: 20:31:35

                    Engine speed: 781.75 /min
                    Normed load value: 16.5 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 91 °C
                    Intake air temperature: 29 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 14.005 V
                    Unlearning counter according OBD: 40
                    Particle filter: soot mass measured-MASS_SOOT_PHY_PF: -1.28 g
                    Particle filter: soot mass calculated-MASS_SOOT_SIM_PF: 10.56 g
                    Particle filter kilometers since last regeneration_1-DIST_RGN_ENVD_H: 340 km
                    Zähler der Regenerationszeit des Partikelfilters-T_INT_RGN_ACT_INI_PF_ENVD_H: 12596.0189 s
                    Particle filter: difference pressure-DIP_PF: 0.00 hPa
                    Particle filter: offset for differential press.-DIP_PF_AD[0]: -1.58 hPa
                    Service regeneration: Release conditions 3-FRF_STATE_RGN: 1

Readiness: 1 1 X X X 
 

 

 

1 hour ago, sparkieboy29 said:

bought some of wynns dpf cleaner used a pressurized container to fill the dpf up,im getting lots of foam out of the back exhaust with lots of muck but it will not regen or rev beyond 2500 revs

You have rendered the DPF FUBAR.

Try this thread to get the values out of your car for Soot measured/calculated and oil ash content.

The error is stored as the DPF regen has been trying for 3.5 hrs I believe to regenerate and cannot complete.

If you just got the car, odds are someone got rid of the car for this very reason.

2 things caught my eye:

15 hours ago, sparkieboy29 said:

Engine speed: 781.75 /min
Normed load value: 16.5 %
Vehicle speed: 0 km/h

 

And

 

15 hours ago, sparkieboy29 said:

it will not regen or rev beyond 2500 revs

 

Are you trying to regenerate without driving the vehicle?

 

The engine will not rev above 2.5k RPM unless the road wheels are turning, you only need to roll forward a fraction but otherwise its blocked at 2.5k.

 

If the vehicle will drive I suggest you take it for a run and allow the DPF to regen.

 

I am making a lot of assumptions but your sistuation sounds similar to my Yeti when I bought it, I could not drive it until I had finished the repairs and got insurance & MOT, meanwhile I was starting and running it fairly often which brought up the DPF light, my attempts to regen at standstill made things worse, I drove onto the motorway and maintained 3K RPM and the regen was completed before the first junction, about 5 miles.