Hi, posted sometime ago about DPF issues. Searched the forum but cannot find the posts as it’s a couple of years ago. Having had the DPF cleaned, off the car which showed the pre and post back pressure values, still having issues with the car pushing out white smoke after sitting ticking over or when undertaking sudden acceleration from a lower speed. Plus it still has the problem of (appearing) to try and continually regenerate once it has got up to temperature. Until then there is no sign of any smoke, nor when driving along. It has also had, throttle body replaced, oxygen sensor replaced and EGR valve replaced. Think it is pretty obvious that the white smoke is due to the additional fuel being injected when trying to regenerate and then being blasted out when pulling away? Have got VCDS and there are no faults recorded, although before the DPF clean the DPF light would come on, otherwise none. Would like some advice from anybody well up on VCDS what live data I should be looking at to try and find out what’s going on or anybody in Kent, UK that might be prepared to give up a bit of time to assist? I would point out that it had the software ‘fix’ before I bought the car and have considered getting it remapped to regress to the original or as close to as could be to see if that made addition. Chopping out the DPF and mapping it out is not an option for me I would add.

Skoda Octavia Estate 2.0 TDI CR CFHC engine.

Your posts are there if you look beside your profile.  Hopefully someone can help.

 

http://briskoda.net/forums/topic/479622-dpf-regeneration

 

Further to this, have now carried out a VCDS Scan. Took it for a run out, thrashed it around a bit to get it hot and see what showed up.

Wednesday,13,April,2022,14:22:07:08428
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 22.3.1.1 (x64)  HEX-V2 CB: 0.4615.4
Data version: 20220401 DS337.0
www.Ross-Tech.com

VIN: TMBGE21Z7C2140161   License Plate: YR12 FEP
Mileage: 196468   Repair Order: 

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                Address 01: Engine  (03L 906 018 C)

14:21:26
  IDE00427   Particle filter: difference pressure 140 hPa
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 10.60 g
  IDE00435   Particle filter: soot mass measured 26.69 g
  IDE02229   Exhaust gas temperature sensor 1 250.1 °C
  IDE02233   Exhaust gas temperature sensor 2 -0.0 °C
  IDE02234   Exhaust gas temperature sensor 3 130.0 °C
  IDE02236   Exhaust gas temperature sensor 4 174.9 °C
  IDE04677   Oxygen sensor 1 bank 1: lambda actual value 6.896 

 

As you can see the difference pressure is 140hPa, is that too high?

Exhaust gas temperature sensor 3 is 130.0c:

1) cannot get this to reach 150.0c in anyway, would this effect the regeneration in anyway, as most information states exhaust temp to be +150.0c?

2) does anybody know exactly which sensor this is. Pre turbo, Pre DPF or Post DPF?

Is the Oxygen sensor value about right?

 
 

 

The DPF has reared it's ugly head again! I had the DPF removed and professionally cleaned and car was running reasonably for sometime with occasional 'bursts' of smoke out the back. However the engine runs ok, does not go into limp mode and according to scans has been carrying out regenerations when necessary. However, recently it has started to play up again and the dreaded DPF light cam on yet when checking with VCDS soot content was in range. Decided to carry out a Service Regeneration which initially was reluctant to kick in but then got it to do so. As you can see the regen was going according to plan with both soot content volumes reducing but the DPF Differential Pressure Sensor was sitting at 38hPa for sometime as the soot content was reducing, then that began going down very quickly down to 3 - 4hPA then suddenly, "BAM" it jumped back up and very rapidly shot up to 152 hPa and the soot content started to rise as you can see from the scans. But as the readings rely on the pressure sensor readings obviously the ECU thinks the DPF is blocked! I don't think it's the sensor at fault as I have fitted 2 or 3 over the time but now wonder if there is a wiring or ECU fault?

 

Tuesday,03,January,2023,10:57:02:08428
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 22.10.0.1 (x64)  HEX-V2 CB: 0.4623.4
Data version: 20221026 DS344.0
www.Ross-Tech.com

VIN: TMBGE21Z7C2140161   License Plate: YR12 FEP

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                Address 01: Engine  (03L 906 018 C)

10:56:52
  IDE00427   Particle filter: difference pressure 40 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 395 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 23.81 g
  IDE00435   Particle filter: soot mass measured 4.36 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1140.6 mV

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--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

10:57:15
  IDE00427   Particle filter: difference pressure 40 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 408 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 23.78 g
  IDE00435   Particle filter: soot mass measured 4.32 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1141.2 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

10:57:18
  IDE00427   Particle filter: difference pressure 40 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 411 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 23.78 g
  IDE00435   Particle filter: soot mass measured 4.32 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1141.2 mV

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--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

10:59:52
  IDE00427   Particle filter: difference pressure 35 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 565 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 23.13 g
  IDE00435   Particle filter: soot mass measured 3.54 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1124.6 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:11:30
  IDE00427   Particle filter: difference pressure 35 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 1263 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 10.84 g
  IDE00435   Particle filter: soot mass measured -1.84 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1127.6 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:13:32
  IDE00427   Particle filter: difference pressure 35 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 26 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 8.53 g
  IDE00435   Particle filter: soot mass measured -2.13 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1126.0 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:16:01
  IDE00427   Particle filter: difference pressure 54 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 175 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 6.46 g
  IDE00435   Particle filter: soot mass measured -2.58 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1193.8 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:17:15
  IDE00427   Particle filter: difference pressure 82 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 249 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 5.75 g
  IDE00435   Particle filter: soot mass measured 1.23 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1291.0 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:17:48
  IDE00427   Particle filter: difference pressure 91 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 283 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 5.47 g
  IDE00435   Particle filter: soot mass measured 3.45 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1321.6 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:17:49
  IDE00427   Particle filter: difference pressure 91 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 283 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 5.47 g
  IDE00435   Particle filter: soot mass measured 3.48 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1321.6 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:17:51
  IDE00427   Particle filter: difference pressure 91 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 285 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 5.45 g
  IDE00435   Particle filter: soot mass measured 3.63 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1323.8 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:17:51
  IDE00427   Particle filter: difference pressure 91 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 286 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 5.45 g
  IDE00435   Particle filter: soot mass measured 3.66 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1323.8 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:17:51
  IDE00427   Particle filter: difference pressure 91 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 286 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 5.45 g
  IDE00435   Particle filter: soot mass measured 3.66 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1324.2 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:18:03
  IDE00427   Particle filter: difference pressure 94 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 297 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 5.36 g
  IDE00435   Particle filter: soot mass measured 4.43 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1332.4 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:18:46
  IDE00427   Particle filter: difference pressure 146 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 340 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 4.82 g
  IDE00435   Particle filter: soot mass measured 5.30 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1604.2 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:19:24
  IDE00427   Particle filter: difference pressure 152 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 378 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 4.73 g
  IDE00435   Particle filter: soot mass measured 5.33 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1611.2 mV

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                Address 01: Engine  (03L 906 018 C)

11:19:26
  IDE00427   Particle filter: difference pressure 152 hPa
  IDE00430-ENG188621   Particle filter: field regeneration request status-Bits 0-7 0 
  IDE00431-ENG188621   Particle filter: field regeneration lock status-Bits 0-7 0 
  IDE00432   Particle filter: time since last regeneration 381 s
  IDE00433   Particle filter: oil ash volume 0.00 l
  IDE00434   Particle filter: soot mass calculated 4.73 g
  IDE00435   Particle filter: soot mass measured 5.34 g
  IDE00436   Particle filter: kilometers since last regeneration 0 m
  IDE03353   Particle filter differential press. sensor: uncond. voltage 1608.6 mV
 

Log-YR12 FEP-TMBGE21Z7C2140161.txt