You might be using an outdated version of KSuite or an incorrect protocol for the specific ECU hardware version.
Ensure the tuning software you used (e.g., WinOLS) was instructed to upon saving. checksum error writing buffer kess v2
If you have a clone, certain firmware versions are problematic. You might be using an outdated version of
Clean the connections using an electronics contact cleaner spray if necessary. checksum error writing buffer kess v2