Start here — before replacing any parts
E022 means throttle-related fault in the specified YL80C protocol. Do not bypass the throttle safety circuit.
First identify the display and its protocol (M5, YL80C, YL80C EU). Codes on one display must not be applied to another.
Manual scope: YL80C protocol; do not recommend safety bypass
Do these checks in order
Follow the steps below and keep a record of what changes after each one. Stop when an actual cause is confirmed.
Confirm the display is YL80C using YL-05/KDS/YL-J; LCD M5 uses a different numbering table.
With power OFF, make sure the twist/thumb throttle returns to rest freely and is not caught by a grip, accessory or damaged housing.
Check only the reachable throttle cable/connector for obvious pull damage, moisture or disconnected plugs. Do not swap similarly shaped motor/brake plugs.
If an obvious obstruction is removed or the correct plug reseated, reboot with the bike stationary and check whether E022 clears before attempting throttle input.
If the problem is gone
Throttle returns to rest and the code clears after correcting a visible issue: verify normal stationary response with safe wheel clearance.
If the problem is still there
E022 remains or throttle output is erratic: do not ride; a technician must test the compatible throttle, harness and controller input.
Which cause matches your result?
Use these more specific checks only when the earlier steps point to that possibility.
01Confirm the YL80C protocol first
E022 belongs to the YL80C protocol group where it indicates a throttle-related fault.
Do not use this definition for an M5 or a different display variant.
02The throttle or external cable may be affected
Power off the bike; check free throttle return and visible wiring damage.
Stop riding if the throttle behaves abnormally; ask service to check the signal before replacing it.
How can I tell it is actually fixed?
Confirm the display is free of E022 after restart and no unintended motor activation occurs during a controlled test.
Before buying a replacement part
Throttle wiring varies by production version; replace only by manufacturer-confirmed part number.
Where this guidance comes from
Primary reference: View the manufacturer or manual reference ↗
Applicability: YL80C protocol; do not recommend safety bypass. Source evidence: Direct Engwe/Yolin owner question about error 22.
The instructions are original English troubleshooting explanations derived from the listed technical facts; they are not a verbatim service manual. Do not apply them to an unverified revision.