Bafang · Throttle
04 Bafang error code 04
Throttle does not return to zero
Per manufacturer documentation
Note
Meaning may depend on model, display and firmware – verify with the manual of the exact type.
Possible causes
General, component-based causes – not a manufacturer-specific statement.
- Throttle does not return to zero
- Throttle Hall sensor or cable fault
- Connector corrosion/water ingress
Safe test steps
- Check mechanical return.
- With the known pinout: supply, GND, signal at rest and fully open.
Workshop reference values
- Common Hall throttle: ~5 V supply, signal ~0.8–0.9 V at rest, ~4.2 V full (type-specific, not a manufacturer value).
Repair approach
- Clean/repair the throttle or replace with the same type.
Tools needed
- Digital multimeter (CAT III, fused inputs)
- Back-probe pins
Safety
- A faulty throttle can make the vehicle start unexpectedly – lift the driven wheel, do not ride.
This information does not replace manufacturer service documentation. Work on batteries and high-voltage parts only with the appropriate expertise.