P2002, P0544 codes, 2009 a3 2.0 tdi cbbb

[aj1soad]

hi everyone. ive got a 2009 audi a3 2.0 tdi 170 cbbb engine. everyday when i scan it i get this code:
008194 - Particulate Trap Bank 1
P2002 - 000 - Efficiency Below Threshold - Intermittent
and sometimes ill get this code as well:
001348 - Sensor 1 for Exhaust Temp Bank 1 (G235)
P0544 - 000 - Circuit Malfunction - Intermittent

 

[aj1soad]

the problem im getting with the car is sometimes it will feel under powered but its hard to notice in normal driving conditions. every 300 miles or so the car will randomly start to smoke really heavy. took the car for a spin today and i put my foot down, around 3500 revs the car hesitated a bit then carried on going. few seconds later the smoking started. i switch the car on and off and its ok again. i have had the coil light flashing a few times but not often. ive got VCDS but not all that familiar with it.

Checked some of the figures on adv mes and showed these
Oil ash volume 0ml
Carbon mass (spec) 23.7
Carbon mass (act) 0
i would have thought it should have showed something at least on the ash volume :S

Also shows driven distance since last regen 480km
I ticked the boxes for
Temp prior turbo shows 132oC
Temp prior particulate filter Blank
Temp after particulate filter Blank
are those meant to be blank or is that the g235 sensor that sometimes comes up?

any help would be appreciated as i dont want to start throwing money at changing random things. i know the previous owner had the throttle body changed and it looks like the o2 sensor going to the dpf regen has been changed as its got a grey cable where all the others are black.