DPF error - 19226 - Particle filter, bank 1, P2002

Hello everyone,

I've been getting an error message since last week, and it keeps appearing.
Can someone help me interpret this error message?
The DPF seems to be in order, and regeneration is still occurring every 500 km, as always.
The vehicle is only used for long-distance travel, specifically 1000 km per week, with 90% of that distance on highways.
The differential pressure at 80% load seems too low to me.
Am I correct in assuming that the error may be due to a faulty differential pressure sensor?

Audi A4 B8 2.0 TDI 110kW. Engine code CSUA, manufactured in 2015.


Thank you in advance.

Self-diagnosis log, Wednesday, November 9, 2022, 19:07:10:60014.
Vehicle Identification Number: WAUZZZ8K6FA178809
Vehicle registration plate:
Mileage: 220524
Repair order:

Control unit part number: 04L 906 021 BS, Hardware: 04L 907 309.
Component and/or version: R4 2.0L EDC H23 8465.
Encoding: 12194012243401080000
Company number: WSC 06325 000 00000 ASAM
Dataset: EV_ECM20TDI01104L906021BS 002005 (AU48) VCID: 77AAE9A08F43E253FE6-8022
19226 - Particle filter, bank 1.
P2002 00 [101] - Malfunction.
Unconfirmed - Checked since last deletion. Environmental conditions:
Error status: 00000001
Error priority: 2
Error frequency: 3.
Mileage: 220,335 km


Date: 2022.11.09
Time: 05:50:31
Motor speed: 1777.50 rpm.
Normalized load value: 83.5%
Vehicle speed: 98 km/h.
Coolant temperature: 66 °C.
Intake air temperature: 58 °C
Ambient air pressure: 990 mbar.
Voltage at terminal 30: 14.580 V.
Lost count after OBD: 40
Exhaust mass flow rate of the low-pressure exhaust gas recirculation (EGR) system: calculated value: 3.044.
Differential pressure ratio: Low-pressure EGR: 39.4 kg/h.
Abgasrückführung 2: Differenzdruckgeber 1 Bank 1: ad. Wert: 73.8 hPa
Exhaust Gas Recirculation (EGR) 2: Differential Pressure Sensor 1 Bank 1: Raw Value: 73.3 hPa.
Exhaust flap control, bank 1: In stock. Actual value: 88.07%.
Exhaust gas recirculation valve, bank 1: Stored value - Actual value: 97.27 %.
Exhaust gas recirculation 2: Differential pressure sensor 1 bank 1: dynamic value: 73.8 hPa[/u]

Customer data, Autoscan?

Hello Reiner,

I am hereby uploading the log file.
What is meant by "customer data"?
Customer number?
Is the order number (17216) sufficient?

Hello,

If the email address is the same as the one used for the order, the system automatically recognizes it as a customer. I've already taken care of that for you.

I would first review the readings for G450 (pressure sensor 1 for exhaust gases) and G505 (differential pressure sensor) and check their plausibility.

For the differential pressure at the DPF, there's the topic of DPF differential pressure nominal values, which gives you a sense of the expected values.
When the ignition is on and the engine is off, the differential pressure should be approximately 0 mbar.

Also, you should also check the hose connections and electrical connections of the sensors (for signs of damage from rodents, etc.).

With a bit of luck, the problem is a faulty sensor or its connection. Check those first.

See also: Calibrate/adjust differential pressure sensor (TDI/DPF)

For general understanding: Google "ssp514 download" .

Best regards, Rainer.

Thank you very much, Reiner.

insbesondere für die Lektüre.
Let's see what we can find. I'll get back to you as soon as I've found something, or if I have any questions.


Best regards, Witalij.

Hi Witalij,
ich hoffe, Deinen Namen richtig geschrieben zu haben. Die persönliche Anrede sollte bei unseren Unterhaltungen schon stimmen. Du schreibst Dir hier mit Rainer....
hg
Herbert.

I didn't even notice, it happened.

Herbert wrote:

Hi Witalij, ich hoffe, Deinen Namen richtig geschrieben zu haben. Die persönliche Anrede sollte bei unseren Unterhaltungen schon stimmen. Du schreibst Dir hier mit Rainer.... hg Herbert

Hello Herbert,
danke für den Hinweis, habe ehrlich gesagt etwas Zeit gebraucht um zu checken was du meinst, aber dann gesehen das ich mir selbst antworte.
Na hoffentlich das ich zumindest für Unterhaltung gesorgt habe.

Best regards,

Hello everyone,

I just wanted to give you a quick update on the situation.
When I went to check the sensors on Sunday, I immediately noticed that someone had already been messing around with them. One of the sensors had already been replaced, and hose clamps had been left off.
So, I started by swapping the sensors and, lo and behold, no more error messages appeared. It seems the control unit can tolerate larger value discrepancies with the G450 sensor than with the G505.
Tomorrow, a new sensor will be installed, and hopefully, things will be quiet for a while after that.

Thank you for the feedback!

Hello everyone,

Unfortunately, it didn't resolve itself ; it would have been too easy.
Okay, I've run a quick diagnostic test and found that the feedback from the exhaust gas recirculation (EGR) valve is showing implausible fluctuations in relation to the target values, which I don't understand.
Unfortunately, I don't have any benchmark data or practical experience to properly assess this, but could someone possibly take a look at the logs to see if this behavior is normal?

Best regards, Witalij.

Hello,

Sometimes the sensor readings are correct, but sometimes they are completely wrong. I suspect a defect or a loose connection. Could it be damage from a rodent, or a short circuit somewhere else in the sensor's power supply?

Best regards, Rainer.

dieselschrauber wrote:

Hello, Sometimes the sensor readings are correct, but sometimes they are completely wrong. I suspect a defect or a loose connection. Could it be damage from a rodent, or a short circuit somewhere else in the sensor's power supply? Best regards, Rainer

Thank you.

Let's see if we can find anything. A loose connection can be incredibly frustrating before you finally locate it.
Is anyone by chance aware of how the level indication is implemented? Is it done with a potentiometer?

Hello everyone,

After a long search, the culprit was finally found, and the error has been corrected. The amount of work involved is enormous, approximately 25-30 hours (including the timing belt).
Instead of describing the errors, I'm simply uploading images, because, as they say, a picture is worth a thousand words.

Hi,

Feedback is always welcome! If the problem can also be solved, that's even better.
Then, the interested reader can learn which measures led to the desired outcome.



Best regards, Richard.

Hi,
I would have been curious to know what that junk was.
hg
Herbert.