i have an audi 2.0 tdi 170 (2007) which is throwing up an injector fault the car is throwing up the dpf regen alarm on a weekly basis I had the dpf cleaned and sensor replaced as it was faulty but still getting the regen light on a weekly basis. Speaking to the mechanic he thinks the injector fault could be causing the regular regen request due to fuel mixture issues. He also informed me audi did a recall on this engine in 2009 to replace the injectors I spoke to audi uk and they didn’t know of this and weren’t very helpful. Does anyone have any information on this or what is the issue and how to fix
fault code picture attached

Fault code for 2.0 tdi 170 engine