Find a (like 1.70) for your specific car year. Explain the flashing process using tools like OCFlash.
Because Opcom devices are no longer manufactured, most on the market are Chinese clones. These clones often ship with corrupted or limited firmware. Here’s how to verify you have the "top" HEX file: opcom firmware 199 hex file top
from a reputable forum or the original manufacturer, as generic downloads may be corrupted. Hardware Connection Find a (like 1