I have a big problem with MED17.5.2 HW 026S05898 SW 1037510463, Upg. SW 8P0907115BA. 100% reading and 100% writing with my genuine Kess, when I write a MOD car does not start. ECU not identified, ECU recovery mode with original car start file, I just changed the fuel for testing using ECM Titanium and WinOls and the problem continues, write in another car equal to the same ECU and 100% working car start, problem only occurs in my personal car.

Can anyone help?
Not knowing if Kess has the wrong checksum and if it is possible to disable and use it only by the WinOls tuner software

most likely mod file problem, post both ori and mod

I attached the original file and Test,
the Mod are not 100% ready, but I wrote in another car and start perfectly

very simple you have 2 checksums are not correct ... you can try like this ...correct the checksum with winols and export the file in desktop and than write the file in recovery mode ...this will bypass checksum

not checksum problem only,its not same file, one looks like boot read and other obd...its missing whole first half of code

write this file, car will start

you should know that tune cannot be read by different tool or method and cant be from different car

jurebv wrote:write this file, car will start

you should know that tune cannot be read by different tool or method and cant be from different car

car not be here this week, coming back I will test

Thank you so much for helping