Rad Power Bikes Error Codes

Reviewed by certified eBike technicians · Last updated July 30, 2026

3 diagnostic codes for Rad Power Bikes e-bike systems.

Error 25

Brake cutoff switch is engaged or faulty

RadRover/RadCity/RadRunner Error 30

Controller communication error — display and controller not talking

RadRover/RadCity Error 21

Battery communication error — BMS not responding

All models

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