Shimano STEPS
Sensors
W013
Torque sensor initialization failed
The torque sensor could not complete its self-calibration when the system was switched on, most often because a foot was resting on a pedal during startup. Assist is weaker than normal until the sensor is initialized correctly. This is the most common Shimano STEPS warning and is almost always fixed by restarting without pedal load.
- Drive system
- Shimano STEPS
- Category
- Sensors
- Motor behavior
- assist reduced
- DIY-friendly?
- possible
Roadside self-help
- Switch the system off via the battery power button.
- Switch it back on without touching the pedals and without load on the crank.
- If the warning persists after several clean restarts, contact your dealer.
Possible causes
- Foot on the pedal while switching the system on high
- Sensor self-calibration interrupted (vibration, load on crank) medium
- Persistent torque sensor fault in the drive unit low
Symptoms
- Assist noticeably weaker than normal
- W013 appears right after switching on
Inspection / repair
- Difficulty: easy
- DIY: possible
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Sources
- ebikeerror.com/shimano/w013-error-code.html
- ebike-mtb.com/en/ebike-error-codes/
- qiolor.com/blogs/news/shimano-ebike-error-codes-explained
- survivalmesserguide.de/shimano-e-bike-fehlercode/
- biketrailspfannenstiel.ch/auskunft/shimano-fehlercode-liste/
- linexo.at/magazin/pflege-wartung/e-bike-fehlersuche-diese-fehlercodes-musst-du-kennen