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Rad Power Bikes error 22: BMS communication error

Rad Power Bikes with Bafang hub motor and Rad LCD display (RadRover, RadCity, RadWagon, RadRunner, RadMini)Dealer neededRide with caution

The controller expects to communicate with the battery's management system and gets no response. Rad riders usually see this with a battery that is not seated fully or has corroded contacts, or with an aftermarket pack.

Likely causes

Battery not locked fully into the mount
Corroded or bent contacts on the battery or the mount
Aftermarket battery that does not communicate
BMS fault inside the pack

How to fix Rad Power Bikes error 22

Remove the battery, clean the contacts, refit and lock, power cycle
Inspect the mount contacts for damage
Test with another Rad battery if possible
Contact Rad support; the battery may need replacement

Go to a dealer if: Go to Rad support or a shop if a clean, seated original battery still shows 22.
Warranty: Rad Power Bikes gives a 1-year limited warranty on electrical parts (2 years on some newer models and regions); contact Rad support with a video of the error before buying parts.
Typical cost: Free if contacts; Rad battery about USD 400-600.

Still stuck? Take a photo of the display and show it to a local e-bike workshop. Bring the bike's system name (e.g. Bosch Performance Line CX) and the exact code; that saves diagnostic time and money.

Frequently asked

Can I reset Rad error 22?

Refit the battery and power cycle.

Can I keep riding?

Assist may be limited or blocked; do not force it.

Warranty?

Yes for the original battery within its warranty.

Related Rad Power Bikes codes

07 · Over voltage protection

Not an official Rad Power Bikes document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.