21 - Speed Sensor Error
Speed signal is missing or implausible.
Medium severity
Caution rideability
Soon urgency
What it means
Controller cannot read wheel speed correctly.
Common causes
- Magnet misalignment
- Sensor cable damage
- Sensor too far from magnet
Symptoms
- Wrong speed reading
- Assist limit issues
- Speed reads 0
How to fix it
- Realign magnet
- Check sensor cable
- Replace damaged sensor