Audi A4 2.0TDI CGLC y2013 DPF regeneration issue

[Raidokl]

Hello,

Audi A4 2.0TDI CGLC Quattro..probably issue with DPF. At first i noticed that exhaust tips have black soot inside - never noticed this before.

Checked with OBD11 what are DPF soot values. Measured value is always higher than calculated values. Usually after regeneration measured value rises to 20g within 70-80km. 20-24g until calculated value follows up and then regeneration takes place - usual frequency is 200-300km.

One more thing I noticed is that when regeneration takes place...calculated value decreases in 20min until 1g has reached. Measured value decreses until 16-14g and then stops..even rises small amount. When I stop driving and car runs idle..measured value decreases until 6g grams in few minutes and regeneration stops. Basically it never stop regeneration while driving. Car usually drives on highway about 2 x 50km per day.

Has anyone had similar issues or has an idea what could be wrong?

Thank You!

[Theiceman]

A4 was never released in North America as a diesel and that represents I would say 95% of this forum. Responses may be limited.
I would suggest audiworld or a vw forum might yeild more results

Sent from my SM-G973W using Audizine Forum mobile app

[DrGER]

Hello,
Audi A4 2.0TDI CGLC Quattro..probably issue with DPF. At first i noticed that exhaust tips have black soot inside - never noticed this before.

Checked with OBD11 what are DPF soot values. Measured value is always higher than calculated values. Usually after regeneration measured value rises to 20g within 70-80km. 20-24g until calculated value follows up and then regeneration takes place - usual frequency is 200-300km.

One more thing I noticed is that when regeneration takes place...calculated value decreases in 20min until 1g has reached. Measured value decreses until 16-14g and then stops..even rises small amount. When I stop driving and car runs idle..measured value decreases until 6g grams in few minutes and regeneration stops. Basically it never stop regeneration while driving. Car usually drives on highway about 2 x 50km per day.

Has anyone had similar issues or has an idea what could be wrong?

Thank You!

What @Iceman said.
You might want to post over at https://www.a5oc.com/forums/a5-general-q-a.2/ , which has a larger European audience.

We have a 2011 Golf Variant 2.0 TDI that had similar frequent DPF regen behavior earlier this year. The local VW service determined a contributing factor was a failing coolant thermostat, which was not closing properly, thus engine operating temperature was rarely at spec (about 90C). You might want to monitor your coolant temperatures. Since replacing the thermostat (and the DPF) in October, our regen cycles have been much longer. --g

[Raidokl]

Thank you Guys..