Giant SyncDrive · Speed sensor · RideControl Ergo, Ergo 2 and ONE (flashing lights)
Giant SyncDrive error code LED 3 (F3 / I3)
The motor gets no signal from the speed sensor
What you can check
Check that the spoke magnet sits right next to the sensor and that the cable is intact. Start the bike again.
Dealer if the fault comes back
Trolda reads live data from Giant SyncDrive bikes. What Trolda shows on your bike
Sources
Explained in Trolda's own words from the manufacturer's public documentation. Trolda is not affiliated with the manufacturer. If in doubt, ask your dealer.
Trolda for your e-bike
Trolda connects to your Giant SyncDrive bike and shows what you did, what the motor did, and what it cost the battery.
Get TroldaTrolda is in open testing on iPhone and Android. You get the app through our tester page, it takes a minute.