Resetting trip distance and the odometer on an S866 / S830 / S861

TRIP resets on power-off on most S866 firmware. ODO can be zeroed with P16 (hold + for 5 seconds on that parameter), which is one-way.

Step by step

1. Press power briefly on the riding screen to cycle TRIP → ODO → (time, voltage).
2. TRIP: switch the display off and on; it starts at 0. On S830 firmware with a persistent trip, cycle to TRIP and hold − for 3 seconds.
3. ODO: hold + and − together for 2–3 seconds and enter the password (1919; else 0512 / 0000 / 8018). Press power to P16, then hold + for 5 seconds until the value shows 0.
4. Power (short press) moves to the next parameter; + / − change the value; hold + and − together to save and exit.
5. Confirm ODO shows 0 on the riding screen. There is no undo.

Can't find it?

P16 does nothing: OEM firmware locks it. TRIP survives power-off: your firmware has a persistent trip; look for the hold-− gesture.

Frequently asked

Manuals and video

These displays are sold unbranded by many factories, so there is no single official manual. Check the manual that came with your bike, or your bike brand's support page.

Videos found on YouTube and checked automatically; they are other people's work, not ours.

• 🔧 S866 LCD Display – Factory Reset & Odometer Reset Guide 🔋 #ebike #ebiketips #ebikerepair EngThink
• S866 Display Reset Setting | ADO A20 / A20F / A16 S866 LCD Display Setting #ev #evscooter #ebike Secret Alert
• HITWAY S866 Display Screen Parameter Reset Procedure HITWAY

Other S866 / S830 / S861 LCD (generic hub-motor e-bikes, Fiido, Engwe, Himiway etc.) guides