Brose Drive S/Drive T/Drive C — Error Code 20
Reviewed by certified eBike technicians · Last updated July 30, 2026
Quick Answer
20 on Brose = Battery temperature warning — battery outside optimal 10-40°C range
Severity: Check — battery temp outside range · Limited riding OK, diagnose soon
Error 20 on your Brose indicates: Battery temperature warning — battery outside optimal 10-40°C range.
Check — battery temp outside range — Battery temperature warning — battery outside optimal 10-40°C range
Symptoms
- Error 20 on Brose display; power limited to 50%; battery gauge shows reduced capacity; may occur in extreme cold or after heavy discharge
Common Causes
- Battery temperature below 10°C (cold weather riding)
- Battery temperature above 45°C (heavy discharge in hot weather)
- Battery stored in extreme temperatures before ride
- Battery cells generating excess heat during rapid discharge
- Faulty battery thermistor giving false readings
Fix Steps
Step 1: 1. If riding in cold weather (<10°C): battery will warm up during use — error clears after 10 minutes of riding
Step 2: 2. If battery feels hot (>45°C externally): stop riding, let battery cool 30 minutes
Step 3: 3. Store battery at room temperature (15-25°C) — never charge in freezing conditions
Step 4: 4. In extreme cold (<0°C): use battery insulator sleeve or keep battery indoors before riding
Step 5: 5. After battery warms: error clears automatically, full power restored
Step 6: 6. If error persists in normal temperatures: battery thermistor may be faulty — dealer check
Step 7: 7. Field tip: carry spare battery in insulated bag for winter rides over 2 hours
Related Error Codes
Error 04
Cadence sensor error — pedal cadence signal lost or reading outside expected range
Error 10Motor position sensor error — rotor position signal lost or out of range
Always disconnect the battery before inspecting wiring.