Connect only to the PC
Unplug the adapter from both vehicle and Windows computer, then reconnect it to the computer alone. Download the OBDLink USB Factory Reset tool through the manufacturer article and run it. The utility scans connected EX/SX adapters and resets them.
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Watch the indicator
During reset, expect rapid red flashes followed by steady yellow. Note a different pattern rather than assuming the reset succeeded. The source then directs a check for current firmware using its Windows updater instructions.
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Return to vehicle diagnostics
After reset and any needed firmware maintenance are complete, connect the adapter to the vehicle. The LED should become steady green. Open OBDwiz and confirm communication. If the original error remains, send support the adapter model, Windows version, error text and observed LED sequence.
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Sources / references 1
- OBDLink — Restore wired adapter factory settings ↗Reviewed Oct 8, 2026
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