23960 - Particulate Trap Bank 1

Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
Hello!

The first time the error came on with a check engine light. I tried to turn it off by restarting the engine but failed. I attached it to VCDS and this is the error that came out:

23960 - Particulate Trap Bank 1
P2002 00 [236] - Efficiency Below Threshold
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 7
Mileage: 267204 km
Date: 2024.04.17
Time: 20:27:34

Engine RPM: 1299.50 /min
Normed load value: 38.8 %
Vehicle speed: 66 km/h
Coolant temperature: 88 C
Intake air temperature: 17 C
Ambient air pressure: 910 mbar
Voltage terminal 30: 14.429 V
Unlearning counter according OBD: 40
Particle filter: air pressure sensor 1 bank 1: raw value: 4.0 mbar
Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 41.2 mbar
Par.fil: diff.pr.sens.1 bank 1: offset: 0.0 mbar
Particl.filt.: differential pressur.sensor 1 bank 1: dyn.offset: -9.3 mbar
Outside temperature sensor 1: B1: raw value: 7.0 C
Particle filter: soot mass measured: -2.09 g
Particle filter: soot mass calculated: 5.31 g

Readiness: N/A


After deleting it, one day I was driving without a problem, but the next day it appeared again. I went to the local dealer, where they said my EGR cooler needed to be replaced and a problem with 4 injectors. The error was not cleared.

Affected by the price offered to me for repair, I went home and launched a service regeneration through VCDS. It passed successfully and the level of soot also became minimal. Then I noticed that while riding another regeneration was released.

After these procedures, the check engine light didn't light up, but when reading with the VCDS, there was an error again, but with another additional code:

23960 - Particulate Trap Bank 1
P2002 00 [01100100] - Efficiency Below Threshold
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 3
Mileage: 267719 km
Date: 2024.04.30
Time: 07:40:46

Engine RPM: 1510.25 /min
Normed load value: 27.5 %
Vehicle speed: 59 km/h
Coolant temperature: 67 C
Intake air temperature: 15 C
Ambient air pressure: 940 mbar
Voltage terminal 30: 14.710 V
Unlearning counter according OBD: 40
Particle filter: air pressure sensor 1 bank 1: raw value: 13.7 mbar
Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 44.8 mbar
Par.fil: diff.pr.sens.1 bank 1: offset: 0.0 mbar
Particl.filt.: differential pressur.sensor 1 bank 1: dyn.offset: -10.3 mbar
Outside temperature sensor 1: B1: raw value: 10.5 C
Particle filter: soot mass measured: 6.28 g
Particle filter: soot mass calculated: 13.47 g


Readiness: 0 0 0 0 0


I can't figure out what these extra codes mean. In the first case it was 236 and now it is 100.
 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
Lightflyer1's suggestion likely does not apply to your car. In fact, I'm sure it doesn't.

Not sure what you have going on specifically as they didn't sell that engine here. You may just need a new DPF.
 

pedroYUL

Top Post Dawg
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2004 wagon BEW(brother)
Some of the numbers for soot are real weird, as they are negative. Did you replace the DPF, or the pressure sensors, or the timing belt right before all of this started?

The sensors (inside the shiny pouch on top back of the engine) are known to break off and create other issues, right after perturbed by a timing belt job. Or the lines that lead to the sensors can get dirty and impede the proper function of said sensors.

If the DPF was changed, adaptation of the new one is needed, otherwise the car doesn't know how to calculate anything on the new one.
 
Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
I had a strange scraping sound on the belt side. The dealer assumed it was the timing belt and that spraying it with teflon spray would fix it. I guess they were opening the belt covers. After the spray the noise didn't stop and I didn't drive the car for a week. But it turns out that the noise is from the oil vacuum pump and is normal for this engine until it warms up.
So I started driving my car again and the light came on the first day. Which also coincided with refueling. But I always charge shell vpower.
 

pedroYUL

Top Post Dawg
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2004 wagon BEW(brother)
So...if they did access the timing belt to spray (which I would never do, actually), there's a good chance they messed up those differential pressure sensors. Open this pouch and carefully inspect the hoses/nipples and electrical connections:
 

pedroYUL

Top Post Dawg
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2004 wagon BEW(brother)
...and the noise...I bet that is the water pump with the silly shroud design, could be sticking/rubbing against the shroud.
 
Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
Everythink looks ok on this side where sensors are placed. Should I read a negative value mbars for the differential pressure at idle
 

pedroYUL

Top Post Dawg
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2004 wagon BEW(brother)
I don't think so (but I'm not sure), maybe there is soot inside the lines that come to both sensors, that will perturb the readings.
 

pedroYUL

Top Post Dawg
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2004 wagon BEW(brother)
I believe that's what @oilhammer does, disconnect them at the sensors and blow compressed air back to the DPF.
 
Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
Some values from today?

You can see the negative values. It's hard to find an open service where they have compressed air because of the Easter holidays. Tomorrow I plan to do about 500 km, so if there is a problem with the regeneration it will show.
 
Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
I'm starting to think that the real problem with this car is the injectors. Yesterday, loaded with 5 people, when accelerating, it shook instead of starting. I had to downshift, especially when going uphill. The shaking is most noticeable at 1300-1600 rpm. With these ECUs, I can't see data on the amount of fuel injected from each injector in the VCDS. I can watch times. And they are as follows:

Fule injection time deviation cylinder 1 21 us
Fule injection time deviation cylinder 2 4 us
Fule injection time deviation cylinder 3 0 us
Fule injection time deviation cylinder 4 -25 us
 

740GLE

Top Post Dawg
Joined
Aug 19, 2009
Location
NH
TDI
2017 Alltrack SE; Totaled 2015 Passat SEL, BB 2010 Sedan Man; 2012 Passat SE w/ Nav,
report back on how new injectors does for it.
 

pedroYUL

Top Post Dawg
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2004 wagon BEW(brother)
We didn't get that engine here. What is the engine code, and are those injectors piezo or solenoid?
 
Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
Thank you for your interest in my problem. I don't know if this engine is sold in your country. The engine is 1.6 tdi 81 kW 110 hp with code .CXXB. The injectors have original number 04L130277D. I really have no idea if they are piezo. Many people here say that they are not under repair. The price at the dealer is startling - about 800 euros per piece. I realized that they correspond to the Delphi 28565330, which I found for 210-250 euros. With much persuasion, the dealer agreed to do the repair, even though the injectors were not original. I have an appointment for June 3rd and I hope my problem will be solved.
 
Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
I took the car from the repair shop a while ago. The engine sounds completely different. Responds instantly to acceleration. I had one cut off when accelerating around 1500 rpm. Not noticeable at the moment. I will drive a bit to see if the error P2002 will appear again and if the regenerations go normally.
 

pedroYUL

Top Post Dawg
Joined
Sep 8, 2011
Location
MI, USA
TDI
2015 Passat CVCA; 2015 GSW CRUA; 2004 wagon BEW(brother)
So the repair was 4 new injectors, anything else?
 
Joined
May 5, 2021
Location
Bulgaria
TDI
Golf MK7 1.6TDI 110HP 2015
I apologize for not writing for so long, but I wanted to see about the repair. And so, over 1,500 km have already been driven and driven in all modes. The car behaves in a completely different way. Reprimands instantly. No friction, DPF Error has not appeared either. As parts, I replaced the 4 nozzles and the reverse fuel nozzle. It wasn't original and it broke in the first week. Everything got bathed in fuel and I had to be towed to a service station. We replaced it with an original one and now everything is fine. There remains the problem of the scraping sound from the belts. But I have an appointment for a belt and pulley change in 2 weeks.
 
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