Kess 2.90 Jun 2026

: Known to correct bugs and connection failures found in earlier versions (like 2.80), especially when communicating with multiple ECUs or complex truck systems.

: The KESS 2.90 boasts extensive compatibility with various vehicle models and ECUs (Engine Control Units). This wide range of support makes it an invaluable asset for tuners who work with diverse car makes and models. Kess 2.90

: It supports automatic checksum correction , ensuring that modified tuning files are mathematically valid before being written back to the ECU to prevent engine starting issues. Transition to KESS3 : Known to correct bugs and connection failures

While KESS 2.90 is for (in-car) programming, its sister tool, K-TAG , is used for "on-the-bench" programming. If an ECU cannot be read via the diagnostic port, a tuner would typically use K-TAG to connect directly to the ECU pins. : It supports automatic checksum correction , ensuring