RideFixer app
RideFixer Android App Scan errors, compare sounds and diagnose e-bike issues on your phone.
Download on Google Play
Shimano Error Code

W020 - Battery Temperature Warning

Battery temperature is outside the normal range.

Medium severity Caution rideability Info urgency

What it means

The system may reduce power to protect the battery.

Common causes

  • Cold battery
  • Hot battery
  • Battery stored in poor conditions

Symptoms

  • Reduced assist
  • Charging delay
  • Range drop

How to fix it

  • Bring battery to room temperature
  • Avoid sun/heat
  • Retry later
Get RideFixer App