Bafang BBSHD/BBS02/M-Series — Error Code 06
Reviewed by certified eBike technicians · Last updated July 30, 2026
Quick Answer
06 on Bafang = Overvoltage protection — battery voltage exceeds controller safe limit
Severity: Stop — overvoltage 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 06 on your Bafang indicates: Overvoltage protection — battery voltage exceeds controller safe limit.
Stop — overvoltage protection — Overvoltage protection — battery voltage exceeds controller safe limit
Symptoms
- Error 06 on display; motor cuts all power; may occur immediately after charging; battery LED may flash; error may clear when battery voltage settles
Common Causes
- Battery charger overcharging — output voltage exceeds specification
- Battery BMS failure allowing cells to overcharge
- Using non-OEM charger with incorrect voltage profile
- Battery firmware glitch causing false overvoltage reading
- Cold-weather charging causing voltage spike
Fix Steps
Step 1: 1. Disconnect battery and measure voltage with multimeter — 48V system should not exceed 54.6V at full charge
Step 2: 2. If voltage reads above 55V: stop using current charger immediately — it is overcharging
Step 3: 3. Verify charger output: 48V Bafang charger should output 54.6V max
Step 4: 4. If charger is correct but battery reads high: BMS cell balancing issue — dealer check
Step 5: 5. Let battery rest 2 hours and remeasure — voltage should settle to 50-53V range
Step 6: 6. Never use aftermarket chargers with incorrect voltage profiles
Step 7: 7. Replacement battery if BMS damaged: ~$250-500 depending on capacity
Step 8: 8. Replacement charger: ~$30-60 for OEM-spec unit
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.