Pedalwise
Reference

Rad Power Bikes RadRunner 1, 2, Plus and RadExpand 5: error codes

How the LED display on the RadRunner 1, RadRunner 2, RadRunner Plus and RadExpand 5 shows a fault with flashing assist lights, what each pattern means, and the first safe check.

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

The Pedalwise team started this page from official manuals, support pages and repair videos. Fixed this yourself, or spotted something wrong? Help improve it.

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 RadRunner 1, RadRunner 2, RadRunner Plus and RadExpand 5. Rad's connector guide for these bikes describes an LED display, the small panel with numbered pedal assist level lights, and says the steps for the RadRunner 1 carry over to the others (Rad RadRunner and RadExpand guide). An LED display can't show a number, so it signals a fault by flashing particular assist level lights. Rad's error guides give the pattern for each code on LED displays.

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, assist level 1 flashing: a throttle problem. Rad's first check is the throttle cable connector, pulled straight apart and inspected for moisture, dirt or damage (Rad error 22).
  • Error 23, assist levels 0 and 1 flashing: a problem with the motor phase wires. Rad starts at the motor cable connector traced from the rear wheel (Rad error 23).
  • Error 24, assist level 2 flashing: often a motor hall fault. Rad checks the motor connector, then has you test the throttle with the rear wheel off the ground and do a rollback test (Rad error 24). What to check
  • Error 30, all assist level lights flashing: a communication error. The bike may also refuse to power on (Rad RadRunner and RadExpand guide). What to check

Before you call a shop

  • Turn the bike off, remove the battery and press the power button to drain leftover power before touching any plug (Rad error 22).
  • Pull each connector straight apart with no twisting, look inside, and push it back with the notches, pins and arrows lined up (Rad error 23).
  • For a flashing pattern of all lights, follow Rad's order: battery tray contacts first, then display, brake, throttle, headlight, motor and taillight plugs, testing the bike after each one (Rad RadRunner and RadExpand guide).
  • Stop at plugs under the skid plate and the large harness inside the downtube unless you are comfortable with them; Rad's guide covers them last for a reason.
  • Photograph any wet, dirty or damaged plug and send it to Rad support instead of cleaning or repairing it.

Videos

Rad Power Bad Power Error 30 from T2 da Bike Guy: an owner tracking down an error 30 on a Rad bike.

More help

Sources

Stuck after these checks? Find a shop near you.

In this section

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.

Talk

Questions, things that worked for you, or something that looks wrong on this page.

Sign in to join the conversation.

CC BY-NC-SA 4.0Text by Pedalwise and contributors, shared under CC BY-NC-SA 4.0. Linked videos and manuals keep their own terms. How to reuse it