Bafang BBSHD/BBS02/BBS03 — Error Code 07
Reviewed by certified eBike technicians · Last updated July 21, 2026
Quick Answer
07 on Bafang = Over current protection — motor current exceeded safe threshold, controller triggered protection circuit
Severity: Stop — over current protection · Do NOT continue riding
⚠️ STOP RIDING — This error indicates a critical safety issue. Continuing to ride may cause battery damage or safety hazard. Stop and diagnose before continuing.
Error 07 on your Bafang indicates: Over current protection — motor current exceeded safe threshold, controller triggered protection circuit.
Stop — over current protection — Over current protection — motor current exceeded safe threshold, controller triggered protection circuit
Symptoms
- Error 07 on display; motor cuts all power abruptly; may occur under heavy load or steep hills; motor may restart after power cycling but trips again under load
Common Causes
- Motor phase wire short circuit between phases
- Controller MOSFET failure causing uncontrolled current flow
- Motor stator winding short from water ingress or insulation breakdown
- Programming current limit set too high for the motor specification
- Heavy load exceeding motor capacity (steep hill, overweight rider, headwind)
Fix Steps
Step 1: 1. Power off bike and remove battery immediately
Step 2: 2. Inspect the three thick motor phase wires (green, yellow, blue) for melted insulation or short circuits
Step 3: 3. Disconnect motor phase connector and check for continuity between phases — should be open circuit phase-to-phase
Step 4: 4. If phase-to-phase resistance is very low: motor stator is shorted — motor replacement needed
Step 5: 5. Check controller programming with Bafang programming cable — verify current limit matches motor spec (BBSHD: 30A max, BBS02: 25A max)
Step 6: 6. If programming shows correct limits but error persists: controller MOSFET failure — replace controller (~$60-100)
Step 7: 7. Test with reduced current limit (e.g., 20A) — if error clears, motor is degraded and drawing excess current
Step 8: 8. Motor replacement cost: ~$250-400 for BBSHD, ~$180-300 for BBS02
Related Error Codes
Error 30
Communication failure between display and motor controller
Error 21Speed sensor error — magnet misaligned or sensor faulty
Error 08Hall sensor error inside the motor
Error 30HController overheat protection activated
Always disconnect the battery before inspecting wiring.