Bosch Performance Line/CX/Active Line/Smart System — Error Code 10

Reviewed by certified eBike technicians · Last updated July 18, 2026

Quick Answer

10 on Bosch = Speed sensor fault — rear wheel speed signal missing or erratic
Severity: Check soon — speed sensor issue · Limited riding OK, diagnose soon

Error 10 on your Bosch indicates: Speed sensor fault — rear wheel speed signal missing or erratic.

Check soon — speed sensor issue — Speed sensor fault — rear wheel speed signal missing or erratic

Symptoms

Error 10 on Intuvia/Kiox/Nyon display; speed reads zero while riding; motor assist may cut out intermittently or default to walk mode only; range estimate shows dashes

Common Causes

Speed sensor magnet on rear spoke knocked out of alignment or missing
Dirt or metallic debris on the speed sensor pickup
Speed sensor wire damaged near chainstay from chain slap or impact
Sensor connector loose at motor or controller
Magnet-to-sensor gap exceeds 8mm — signal too weak for reliable detection

Fix Steps

Step 1: 1. Check the speed sensor magnet on the rear wheel spoke — Bosch uses a small round magnet that can easily detach on rough terrain

Step 2: 2. Clean the speed sensor pickup on the chainstay with a dry cloth — chain debris and metal filings can stick to the sensor face

Step 3: 3. Realign the magnet to pass within 5-8mm of the sensor pickup as the wheel rotates

Step 4: 4. If the magnet is missing: Bosch replacement magnets are available at dealers or online (~$5-8)

Step 5: 5. Inspect the sensor wire routing from the chainstay to the motor housing for cuts or abrasion

Step 6: 6. Unplug and firmly reconnect the speed sensor connector at the motor

Step 7: 7. Ride above 5 km/h for 10 seconds to reset the error — Bosch systems auto-clear speed sensor faults after successful detection

Related Error Codes

Error 500

Bosch Performance Line/CX/Active Line/Smart System — Error Code 10

Quick Answer

Symptoms

Common Causes

Fix Steps

Related Error Codes

Internal drive unit error — motor controller fault detected

Battery charge level discrepancy — BMS reporting inconsistent data

Speed sensor error — magnet misaligned or sensor dirty

Motor lock detected — drive unit mechanically blocked or rotor stalled