Xiaomi Pro 2, Mi 3 and 4 Pro: error 14 throttle fault, scooter won't accelerate

Your Xiaomi scooter turns on, but pressing the throttle does nothing, and the display shows 14 or the scooter gives one long beep followed by four short beeps. Xiaomi's support pages for the Pro 2, the Mi Electric Scooter 3 and the 4 Pro all say this code means the throttle should be replaced, and recommend a Xiaomi service center (Pro 2 throttle FAQ, Mi 3 throttle FAQ, 4 Pro throttle FAQ). The short answer: run Xiaomi's quick checks, and if 14 stays, the throttle is the part to change.

Most likely cause

The throttle sends the controller a signal from a small sensor inside the lever. When that signal is missing or stuck, the scooter shows 14 and won't drive. Xiaomi treats 14 as a throttle hardware fault on these models (Pro 2 throttle FAQ). Xiaomi's general scooter FAQ explains the beep version of the code: a long beep counts as 10 and a short beep as 1, so one long and four short is 14 (Mi Electric Scooter FAQ).

Other causes to rule out

These come from Xiaomi's own troubleshooting list for the same models (4 Pro throttle FAQ):

• Low battery: Xiaomi says a low charge can affect electronic parts, the throttle included.
• Not moving yet: the throttle only responds once the scooter is above 4 km/h (2.5 mph), as Xiaomi's Mi 3 throttle page also stresses. A throttle that does nothing from a standstill is normal.
• Debris or a worn grip: dirt can block the lever, and a worn grip may not move it properly.
• A lever pressed against the handlebar: if there's no gap between the throttle and the handlebar, the throttle can stick.
• A software glitch: Xiaomi suggests a power cycle and a firmware check in the Mi Home app.

How to confirm

1. Charge fully, then power on.
2. Push off to a slow roll, faster than walking pace, before you press the throttle.
3. Switch riding modes and try again, as Xiaomi suggests.
4. Look for dirt around the lever and check that it springs back by itself.
5. Check for a gap between the throttle and the handlebar. If they touch, move the throttle housing slightly so there's clearance, as Xiaomi describes.
6. Turn the scooter off, wait a few seconds and turn it on.
7. In the Mi Home app, open the scooter's device card, then the menu, and check for a firmware update. A factory reset in the same menu is Xiaomi's last resort and erases your settings.
8. If 14 or the beep pattern is still there, the throttle needs replacing.

Fix options

Send it to a Xiaomi service center (easy for you)

This is Xiaomi's recommendation on every one of these pages, and the right route while the scooter is under warranty. Find your local service channel on the Xiaomi contact page.

Replace the throttle yourself (moderate)

Outside warranty, a replacement throttle for your exact model is a common repair. The job means opening the handlebar area, unplugging the old throttle and routing the new cable the same way. Repair shops publish walkthroughs, like the LOCO Scooters video below for the M365 family. Buy a throttle listed for your exact model.

Wiring or controller diagnosis (pro)

If a new throttle doesn't clear 14, a shop should check the cable between the handlebar and the controller. Don't open the controller.

Parts

• Throttle for your exact model

Videos

When to get a pro

Get help if the throttle ever sticks open, if the code comes back with a new throttle, or if the cable is damaged inside the stem. See throttle not working, the Xiaomi scooter troubleshooting page and when to call a pro.

Sources

• Pro 2 throttle FAQ, mi.com
• Mi 3 throttle FAQ, mi.com
• Mi 3 throttle page, mi.com
• 4 Pro throttle FAQ, mi.com
• Mi Electric Scooter FAQ, mi.com
• Xiaomi contact page, mi.com
• Xiaomi M365 Electric Scooter, Throttle Repair, Error Code 14, Repair Tutorial, youtube.com

Stuck after these checks? Find a shop near you.