Vag - Eeprom Programmer 119g Skacat

| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Cannot read chip | Wrong chip family selected | Check markings on IC | | Verification fails | Bad contact on clip leads | Resolder or use ZIF socket | | Checksum error after write | Algorithm mismatch | Use manual checksum fix (e.g., VAG EEPROM Calculator) | | COM port not found | Driver missing | Install CH340 or FTDI drivers | | Mileage shows random | Incorrect byte order | Swap read/write bytes (little-endian vs big-endian) |

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