Yamaha Error Codes

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

4 diagnostic codes for Yamaha e-bike systems.

Error 15

Torque sensor calibration error — sensor reading out of range or signal lost

PW-X/PW-X2/PWseries Error 09

Speed sensor signal abnormal — rear wheel speed signal lost or erratic during operation

PWseries ST/PWseries S Error 11

Motor system error — internal drive unit fault or controller failure

PW-X/PW-X2/PWseries Error 12

Speed sensor error — wheel speed signal lost or erratic

PW-X/PW-X2/PWseries

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