Koxy

Hey MartynVRS, Did you end up fixing this issue or locating the relay for P1927 - Relay for Aux Coolant Pump (J496): Open Circuit? Where is the relay located?

I never had an issue with the car again after fixing it. Sent from my SM-N910G using Tapatalk

Not a problem. [emoji2] In regards to your question I don't really know. I never knew about DPF's, Regeneration, VCDS etc until errors codes/lights appeared and I started Googling to investigate the errors. I never new that Regeneration processes occurred and never noticed anything unusual while driving. Sent from my SM-N910G using Tapatalk

Sorry i pasted the following as a table from Excel but looks like didn't post that way "Group Descrip Window 1 Window 2 Window 3 Window 4 97 Diesel Particle Filter Particle Filter Offset Different Pressure Pressure blank blank 99 Diesel Particle Filter Engine Speed (G28) Temperature prior Turbo Charger Temperature prior Particle Filter Temperature after Particle Filter 100 Diesel Particle Filter Temperature prior recatalytic Converte Temperature prior Particle Filter Particle Filter Different. Pressure Particle Filter Offset Different. Pressure 101 Diesel Particle Filter Engine Speed (G28) Emerg.Regenerat. Current Duration Emerg. Regenerat. Time since start Successful Regenerations 105 Diesel Particle Filter Bin. Bits Requested Regenrations Temperature (no units) 106 Diesel Particle Filter blank Fuel Consumption since Regeneration Driven Distance since Regeneration Time elapsed since Regeneration 108 Diesel Particle Filter Particle Filter Ash Volume Particle Filter Carbon Mass (Spec) Particle Filter Carbon Mass (act) blank" The table should read: 097 DPF W1:Filter Offset Different Pressure; W2: Pressure; W3: Blank; W4 Blank 099 DPF W1: Engine Speed (G28); W2 Temp. prior Turbo; W3: Temp prior DPF; W4: Temp after DPF 100 DPF W1: Temp. prior recatalytic converter; W2: Temp prior DPF; W3: DPF Different Pressure; W4: DPF Offset Different Pressure. 101 DPF W1: Engine Speed (G28); W2: Emerg. Regeneration current duration; W3: Emerg. Regeneration time since start; W4: Successful Regernerations. 105 DPF W1: Bin.Bits; W2: Requested Regenerations; W3: Temperature; W4: "Blank" 106 DPF W1: "Blank"; W2: Fuel Consumption since Regeneration; W3: Driven Distance since Regeneration; W4: Time elapsed since regeneration 108 DPF W1: DPF Ash volume; W2: DPF Carbon Mass (Spec); W3: DPF Carbon Mass (act); W4: "Blank" Sorry if the above isn't clear, but this the best I could do to copy the information from excel spreadsheet.

Hi Juhagpl Below are the Measuring Blocks that were present in VCDS (Engine Control Module) relating to DPF for my car (I think you are asking about Group 105):- Group Descrip Window 1 Window 2 Window 3 Window 4 97 Diesel Particle Filter Particle Filter Offset Different Pressure Pressure blank blank 99 Diesel Particle Filter Engine Speed (G28) Temperature prior Turbo Charger Temperature prior Particle Filter Temperature after Particle Filter 100 Diesel Particle Filter Temperature prior recatalytic Converte Temperature prior Particle Filter Particle Filter Different. Pressure Particle Filter Offset Different. Pressure 101 Diesel Particle Filter Engine Speed (G28) Emerg.Regenerat. Current Duration Emerg. Regenerat. Time since start Successful Regenerations 105 Diesel Particle Filter Bin. Bits Requested Regenrations Temperature (no units) 106 Diesel Particle Filter blank Fuel Consumption since Regeneration Driven Distance since Regeneration Time elapsed since Regeneration 108 Diesel Particle Filter Particle Filter Ash Volume Particle Filter Carbon Mass (Spec) Particle Filter Carbon Mass (act) blank However, for me Group 099.3 and 099.4 in VCDS is "Blank" (Temperature Prior and After Filter). I'm not sure if this is normal? My thinking was that the car was not reading these temperatures and was the reason for not being able to do Regeneration. I knew that both sensors were working because both were displaying 215 ohms at ambient temperature and the resistance increased as the temperature increased. The Regeneration system uses Temperature After Filter to determine how much additional fuel is required during the Regeneration process to heat up DPF. I believe the Ross-Tech Cable is worth having even if just to monitor in more detail what is happening with your car (way better than just having a Scan Tool). Anyway, I hope this information helps.

Thanks for pointing this out Dread1977

It is the full VCDS with a genuine Ross-Tech cable. After Adapting/Resetting the DPF the Ash content and Carbon Mass (spec) went to zero (0) but the car was still measuring Carbon Mass (act. ) as 46.2. I just couldn't get this to drop. I was thinking that there was something funny electrical going on either the ECM or a wire harness issue. I was expecting after the reset that the car would get out of "Limp Home " mode but it didn't. Every time I cleared the P242F error code it would just come back with only the Ignition ON and Engine OFF. I knew the sensors were working I just couldn't work out why the car was still measuring a high carbon content in the DPF, hence the trip to the dealer. The dealer couldn't tell me for certain if the car was in "Limp Home" mode due to the high carbon reading . Who knows maybe I wasn't doing something right even after following the instructions that I found on the Internet. Sent from my SM-N910G using Tapatalk

I don't understand why my VCDS couldn't get the car out of "Limp Home" mode when VCDS and the ECM accepted the Adaptation and Regeneration codes.Now that it's been done by the dealer I'll conect my VCDS over the weekend to see what the data looks like now. Thanks again to everybody for your feedback and interest. Sent from my SM-N910G using Tapatalk

Final update: The DPF issue with my car seems to be finally resolved. I took my car to the local Skoda dealer where they performed an Adaptation and a Regeneration which seems to have fixed it for now. I'm not sure why this didn't work for me using VCDS. Sent from my SM-N910G using Tapatalk

Mechanically speaking the DPF is clean and there is no reason for the flow to be restricted. This is evident by the pressure difference reading. With engine ON and on idle the G450 sensor is registering 3mbar difference (almost zero) virtually no difference in pressure. Hence, no restriction in the DPF. Even if I removed the core completely there is a good chance that it won't work. After clearing the codes and before turning on the engine, the error code logs quickly with only the ignition ON. I believe there might be some electrical fault which is tell the car there is still a lot of carbon in the DPF which is physically not possible. I wouldn't say that I have wasted lots of time or money. All the work has been done at home, I have just been learning a lot on this journey. It has been small steps at a time. I'm just sharing my journey so that other people can learn from this and maybe somebody out there has been through this and can offer some help. Sent from my SM-N910G using Tapatalk

Well this DPF issue is really starting to do my head in!!! Tonight I replaced the G450 Pressure Differential sensor (also did the Adaption) and still no luck. The Car is still in "Limp Home" mode and is still measuring a Carbon Mass level of 47.1 I believe that the temperature sensors are good but for some reason i can't explain why there is no Temperature displayed for PRIOR and AFTER DPF in Measuring Group 099. Has anybody had this issue before with Measuring Group 099? Can anybody explain how all of the sensors in the DPF system calculate/measure the Carbon Mass level?

I have tried the Forced Regeneration with VCDS atleast 3 times but never successful. I'm pretty sure the reason for this is because the car is in "Limp Home" mode. Sent from my SM-N910G using Tapatalk

Firstly, thank you to everybody that has so far replied to my post. I really appreciate your feedback and assistance. Tonight was supposed to be my moment of truth. I had removed the DPF from the car, cut the DPF open and washed out the ‘soot’ build up from the filter. After welding the filter back together and placing back in the car I was really hopeful that this was going to fix my issue. I have photos of this that I would like to share but I don’t know how to link/attach to this reply. I performed the Adaption (Reset the DPF) using VCDS, cleared all of the Fault Codes, started the car and…..DPF light came on as well as the dreaded flashing Glow Plug light. The error code stored in the Engine Control Module was: 009263 - Diesel Particulate Filter (Bank 1) P242F - 000 - Restricted/Clogged - MIL ON Measuring Block – Group 108 was reading: 0 ml Particle Filter oil Ash Volume 0 Particle Filter Carbon Mass (spec.) 47.4 Particle Filter Carbon Mass (act.) Obviously, this can’t be right since the DPF has been cleaned. My next step is to replace the G450 (Pressure Differential) Sensor (even though it still seems to be reading pressure differences as expected). However, I am also very curious as to why no Temperature values appear in Measuring Block 099 for Temperature BEFORE and AFTER Particle Filter (MB099.3 and MB099.4)??? The temp sensors both seem to be physically working. Using a Multi-meter, the resistance measured between the terminals (of both sensors) at ambient temperature were very similar (215 mOhms) and the resistance had increased after slightly warming up the engine (as expected). Will see what happens after replacing the G450 sensor.Firstly, thank you to everybody that has so far replied to my post. I really appreciate your feedback and assistance.

Thanks again for the replies. I believe that I cannot get the car to the Forced Regeneration because the car is in "Limp Home" mode. This will not allow the car fuel/exhaust system to get hot enough. I'm not sure what is causing the car to stay in "Limp Home" mode (Even with a "clogged" DPF I am leaning towards the EGR system). I have seen this chart before and am not sure at what point the DPF warning light came on. I purchased VCDS cable about week after the DPF light came on (still learning about all of this stuff!). The G450 Pressure sensor displays 0 mbar with the Ignition ON and Engine OFF (which is what is expected). If the Pressure Sensor was faulty I would expect to see some other value. Between the DPF and Turbo Boost Actuator, it seems to have been some sort of chain reaction. After replacing the Turbo Actuator Boost Control I cleared all of the codes and went for a couple of drives since. The error code (P2563) relating to the turbo is no longer stored in ECU. When using VCDS, the voltages readings for this (position) sensor are within range I didn't perform an "Adaption" for this in VCDS. I'm not sure if an Adaption needs to be done because it seems to be OK now. OUTPUT Tests:- I do not have any error codes stored relating to EGR. However, when viewing "Readiness" in VCDS, the Exhaust Gas Recirculation is "Failed or Complete" There is also an EGR error when performing the "Basic Settings" cycle for EGR through VCDS. I understand the Readiness Codes are set to "Fail or Incomplete" when all DTC's are cleared and that these On-Board Emissions Tests will "Pass" once the car has successfully cycled through them during a driving cycle. Without any error codes stored relating to this, I'm not sure what to exactly look for.

Yes, the computer does need to be reset when a new or cleaned DPF is placed in the car. This can be done using VCDS software and cable. Sent from my SM-N910G using Tapatalk