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Rad Power Bikes RadCity and RadMini with the LCD display: error codes

The codes Rad lists for its LCD display on the RadCity (2016 to 2020, including RadCity 3, 4 and Step-Thru) and the RadMini, including the RadMini 4, with the first safe check for each.

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 two Rad families that Rad's own guides describe with an LCD display: the RadCity from 2016 to 2020 (RadCity 2, 3 and 4 and the matching Step-Thru models) and the RadMini from 2016 on, which includes the 2019 and later RadMini that the RadMini 4 belongs to (Rad RadCity guide, Rad RadMini guide). On these bikes the LCD shows the code as a number. Rad's error guides for LCD displays define the codes below.

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 22: often a throttle issue. Rad's first check is the throttle cable connector, pulled straight apart and inspected (Rad error 22).
  • Error 23: often a problem with the motor phase wires. Rad starts at the motor cable connector traced from the rear wheel (Rad error 23).
  • Error 24: often a motor hall fault. Rad checks the motor connector, then a throttle test with the rear wheel off the ground and a rollback test, and asks you to send the results to support (Rad error 24).
  • Error 30: a communication error. Rad has a connector check guide for each model. What to check on a RadCity, what to check on a RadMini 4

Before you call a shop

  • Power off, remove the battery and press MODE to drain leftover power before touching any plug (Rad RadCity guide).
  • Pull each plug straight apart and push it back with the arrows lined up. The display plug is the exception on the RadCity: its metal collar twists to lock (Rad RadCity guide).
  • Work through Rad's order for your bike and test after each plug. On the RadMini that starts with the battery, display and harness plugs, then the motor plug on the right chainstay (Rad RadMini guide).
  • If the code goes away only while one part is unplugged, that part likely needs replacing, so tell Rad support which one (Rad RadCity guide).
  • Photograph any wet, dirty or damaged plug and send it to Rad rather than cleaning it.

Videos

LCD Display Features | Rad Tech from Rad Power Bikes: a tour of the LCD display's buttons and screens.

More help

Sources

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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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