What to do if eKey Gateway shows error code "E0"?
- JJoshua HartAug 16, 2025
If the eKey Gateway shows error code "E0" and starts a countdown from 45, this could mean there's no connection to the fingerprint scanner or the system's power supply has been interrupted. Check the 4-pin connection cable and ensure the power supply at terminals 3 and 4 is at least 8V. Then, wait for the start process to finish.





