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Aventon Level.2, Pace, Sinch and Aventure: error codes

The codes Aventon's manuals list for the Level.2, Pace 350 and 500, Sinch and Aventure, 21 to 30, what each means and what to do.

Last edited Nov 8, 2026 by Pedalwise team Edit History Add a subpage

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Battery and electrical safety. Lithium-ion batteries can catch fire if they're damaged or charged wrong. Never open a battery pack, and stop using any battery that's swollen, hot, wet or smells burnt. Every edit to this page is checked by a second person before it goes live.

This page covers the Aventon Level.2, Pace 350 and Pace 500, Sinch and Aventure. Their manuals explain that the display and controller have a built in fault check, and a code number appears on the display when it finds a problem (Level.2 manual). The core codes are the same on all four manuals. A few extra codes appear only in some, noted below. Aventon's advice for any code is to stop riding and contact Aventon, so treat the checks here as the safe basics before that call.

A code that points at the motor, controller, wiring or battery is an electrical fault. Do only the plug checks on this page, with the bike off and the battery removed, and leave opening the motor, controller or battery, soldering or rewiring to a pro or the maker's support. See battery won't charge and when to call a pro.

Codes

  • Error 21: abnormal current. What to check
  • Error 22: throttle fault. Check that the throttle returns and its plug is seated.
  • Error 23: motor phase fault. What to check
  • Error 24: motor hall fault. What to check
  • Error 25: brake switch fault, or a brake applied while turning on. What to check
  • Error 26: overheat protection. Listed in the Level.2, Pace and Sinch manuals (Pace manual). Stop and let the system cool.
  • Error 27: motor lock protection. Listed in the Level.2, Pace and Sinch manuals. Check that nothing is stopping the rear wheel from turning.
  • Error 28: low voltage protection. Listed in the Level.2 and Sinch manuals (Sinch manual). Charge the battery.
  • Error 29: over voltage protection. Listed in the Level.2, Pace and Sinch manuals. Use only the Aventon charger and contact Aventon.
  • Error 30: communication fault. What to check

Before you call a shop

  • Stop riding when a code appears and note the number (Aventure manual).
  • Turn the bike off, check the battery is seated and locked, and turn it on again with no brake lever held.
  • Look along the cables from the handlebar to the motor for a plug that has pulled apart or a cable that is pinched or rubbing.
  • Charge fully with the Aventon charger.
  • If the code returns, contact Aventon with the code and your model. Leave the motor, controller and battery to Aventon or a shop.

Videos

How to fix Error 30 on your Ebike from Rize Bikes: a shop's general walkthrough of chasing a communication error on a hub motor e-bike.

More help

Sources

Stuck after these checks? Find a shop near you.

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Need a pro?

If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.

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