Troubleshooting & TOTP Sync
Fixing invalid 2FA code errors (Clock drift calibration)
Pair2FA Engineering
·Updated 1 day ago
·3 min read
Why 2FA passcodes fail and how Pair2FA auto-calibrates client-server UTC time drift.
Understanding Time Drift
TOTP 30-second verification passcodes depend on synchronized UTC system clocks. If an external service reports 'Invalid Passcode':
1. Ensure your operating system clock is set to Automatic NTP Time Sync.
2. Click 'Re-sync Time Engine' on the account card in Pair2FA.
3. Pair2FA automatically offsets millisecond time drift between client and server.
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