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Shimano STEPS / EP error code

Shimano STEPS / EP error E020: Battery and drive unit cannot communicate

High severity Service soon

Can I ride home with this error?

Ride with caution. No assist; the bike can be pedalled.

What it means

A communication error between the battery and drive unit was detected, so assist is not provided.

Likely causes

  • Loose or damaged cable between battery and motor
  • Battery not seated properly
  • Dirty contacts

Symptoms

  • No assist
  • E020 shown

How to fix it

  1. Turn the system off.
  2. Remove and refit the battery so it clicks fully into place.
  3. Check any visible cable between the drive unit and battery is connected.
  4. If it continues, contact your place of purchase.
Still showing E020? The RideFixer app finds bike shops near you, so you know where to take it.

How urgent is it?

See a dealer if reseating the battery does not help.

Applies to

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