Kess V2 Protocol Not Found 💯

| Cause | Explanation | |-------|-------------| | | Many cheap KESS v2 units from eBay/Aliexpress have incomplete or mismatched firmware. The protocol database may be missing or corrupted. | | Incorrect vehicle selection | Choosing the wrong model, year, or ECU type confuses the protocol detection. | | Wiring / OBD connection issue | Loose pins, poor soldering inside the KESS cable, or a faulty OBD2 adapter (e.g., missing CAN lines). | | Power supply problem | Insufficient voltage (especially during writing) can cause protocol handshake failure. Use a battery charger (13.5V–14.5V). | | Corrupted SD card / firmware | Clone units often rely on an SD card containing protocols. If the card is corrupted or files are missing, protocols won’t load. | | ECU locked or non-standard protocol | Some ECUs (e.g., Bosch MED17, Siemens SIM2K) require boot mode or bench connection; OBD protocol may be disabled by the manufacturer. |

Ensure there is a folder named and that it isn't empty. kess v2 protocol not found

: Open the KESS V2 casing, remove the internal SD card, clean the contacts, and reinsert it firmly. Hardware Inspection | Cause | Explanation | |-------|-------------| | |

: Failing to select the correct vehicle make, model, and ECU type in the Kess V2 software can lead to protocol mismatch errors. | | Wiring / OBD connection issue |