help me with explanation dtc,s off

[weske2000]

hello good day

i have problem to find good
solution

Ecu me 7.5.10

flash 29f800bb

eep 95040

dtc p0420

13648 adres to starting dtc

what next :P

please help

i have add the file

[Babos]

Can i try you explane?
First you must call in bosch call center and ask how he do that job :D
Secound say I want to know how that all works, becaus i want delete your DTC he no need for YOU :D
Next step you not ask how that all work and how other masters do that job and wait solution :D