Hiboy S2, S2R, S2 Pro, S2 MAX, KS4, KS4 Pro, S2R Plus and MAX Pro error codes · Hiboy S2 series

E2 Error on Hiboy S2 series

What it means + how to fix it From the brand

Quick answer

E2 on the Hiboy scooters (S2, S2R, S2 Pro, S2 MAX, KS4, KS4 Pro, S2R Plus, MAX Pro) means “Throttle error.” Most likely cause: a sticking throttle, a loose throttle cable or a faulty throttle. Try this first: check the throttle springs back.

Try this first

Free, and each takes under 5 minutes.

Check the throttle springs back
Switch off and restart

In plain English

The controller is getting a wrong signal from the throttle. A throttle that sticks can make the scooter move unexpectedly, so don't ride until it's fixed.

Step-by-step checklist

Work from the top. Steps go from free and easy to shop jobs. Switch the scooter off before touching any connector. Tick each step as you go. Your progress is saved on this device.

1Check the throttle springs backFree With the scooter switched off, press the throttle and let go. It should spring fully back on its own. Make sure nothing is pressing on it.
2Switch off and restartFree Turn the scooter off, wait 30 seconds, then turn it back on. If the code clears, note what you were doing when it appeared, in case it comes back.
3Contact support or a service centerShop job If the code stays after these checks, stop riding and contact the brand's customer support or an authorized service center. Don't open the deck, battery, controller or motor: most scooter batteries and controllers aren't user-serviceable.

Still not fixed?

Pages to try next:

All Hiboy scooters (S2, S2R, S2 Pro, S2 MAX, KS4, KS4 Pro, S2R Plus, MAX Pro) codes

When it's time for a shop: if you've worked through every step and the problem is still there, contact the brand's support or an authorized service center. Bring your notes on when it happens, plus the code.

Words on this page: Controller Throttle