EP8 error codes

· Common displays: EW-SS300, EW-SS301, EW-SS302 · Shimano

Shimano EP8 is a high-performance e-MTB drive system designed for trail and all-mountain use, featuring a compact, lightweight (2.6 kg) design and 85 N·m of maximum torque. It emphasizes natural pedal feel, intelligent power delivery across Eco, Trail, and Boost assist modes, and advanced thermal management for sustained climbs.

Good to know

Fault codes for EP8 are documented in Shimano's official E-MTB/Di2 ERROR CODES resource, accessible via the 'E-MTB/Di2 ERROR CODES' link in the footer of Shimano's technology pages.

No codes published for this system yet — submit the code you’re seeing and we’ll research it.

Same number, different meaning. Error codes are not standardized between manufacturers — the same number can point to different faults on other systems. Always confirm your drive system first, or compare all systems.

Official support: Shimano support · https://bike.shimano.com