I need some help or advice, I have a passat 2.0tdi BMP ecu EDC16U34, and I write stage 1 without any problems but the car does not start.. Thanks

either you have wrong checksum or you have tprot ...
you have to have a tool that patches the tprot otherwise write the file in full bdm with ktag and car will start

How do I know if there is a tprot, please explain what exactly to do if it is not a problem, I have a full bdm from the tag ok and I have a backup from kess. Thanks man

if you do it in full bdm you wont have a problem with tprot ......just upload the stage 1 with ktag and your job is done

I have original file in bdm, Ktag says loaded backup file error, kess write good, and try another map k-tag writes it and the car starts but the stop light is constantly working, I think that's what l
You say t-prot in question, how can I remove it, e I have a question I have a database of maps, how do I know it's for kess or k-tag?

you have to write your original file again with your kess so that the car can start and than do it in bdm mode with ktag ... the ktag it works without problems in full bdm ... if you have the latest china version ... ofcourse original works ... but also china works
otherwise you can try with vag-can pro it reads ecu and it can patch tprot but not in all cars ... perhaps at your car will work... but if i were you i would upload original file again with kess and read the ecu with ktag ....in full bdm

tprot ima funkciju da vam zabrani čitanje ecu-a s obd-a, zato morate pročitati ecu-u s bdm-a ..... ako s uspjehom čitate ecu-u iz bdm-a s ktag ... onda tu datoteku učitate na forum i netko može ukloniti tprot iz datoteke .... nakon što se tprot ukloni iz datoteke, možete ponovo pročitati pisati iz obd so kess