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All error codes
Internal Drive Unit Error
Bosch · Drive unit reported an internal fault and disabled power assist for component protection.
Motor Voltage Error
Bosch · Abnormal voltage in the motor circuit. Riding can worsen controller damage.
Speed Sensor Signal Error
Bosch · The speed signal is missing, weak, or not believable.
Internal Battery Error
Bosch · Battery electronics reported an internal fault.
Drive Unit Error
Bosch · The motor/drive unit has detected a serious operating fault.
Speed Sensor Error
Bosch · The bike cannot correctly detect speed.
Tuning Detection / Manipulation Suspected
Bosch · The system detected an abnormal speed signal pattern.
Battery Communication Error
Bosch · The battery and drive system are not communicating correctly.
Improper Load Detected
Bosch · The drive system detected an abnormal electrical or mechanical load.
Battery Temperature Error
Bosch · Battery temperature is outside the safe operating range.
Battery Charging Error
Bosch · Charging process failed or charger/battery communication is unstable.
Multiple Battery Errors
Bosch · Several battery faults are active at the same time.
Motor Communication Fault
Yamaha · Motor and display/control unit lost communication.
Speed Sensor Fault
Yamaha · Speed sensor signal is missing or implausible.
Torque Sensor Fault
Yamaha · Pedal torque reading is outside the valid range.
Battery Communication Error
Yamaha · Battery is not communicating reliably with the system.
Display Communication Error
Yamaha · Display/controller communication is interrupted.
Motor Over Temperature
Yamaha · Motor temperature is high and assist may be reduced.
Controller Fault
Yamaha · Controller detected an internal electrical fault.
Motor Internal Sensor Error
Yamaha · Internal motor sensor feedback is invalid.
Speed Sensor Warning
Yamaha · Speed reading is unstable but the system may still operate.
Drive Unit Temperature High
Shimano · Drive unit temperature is high and assist may be limited.
Speed Not Detected
Shimano · Wheel speed was not detected correctly.
Torque Sensor Initialization
Shimano · Torque sensor failed to initialize correctly at power-on.
Battery Temperature Warning
Shimano · Battery temperature is outside the normal range.
Di2 / Shifting Unit Warning
Shimano · Electronic shifting system communication is abnormal.
System Error
Shimano · Drive unit detected a system fault.
Torque Sensor Error
Shimano · Torque sensor value is abnormal.
Speed Sensor Error
Shimano · Speed signal is missing or invalid.
Battery Communication Error
Shimano · Battery and drive unit communication failed.
Setting / Configuration Error
Shimano · System configuration is inconsistent.
Brake Sensor Error
Bafang · Brake cut-off signal is active or abnormal.
Throttle Not Returned
Bafang · Throttle signal did not return to zero at startup.
Throttle Fault
Bafang · Throttle voltage is outside expected range.
Low Voltage Protection
Bafang · Battery voltage is below the controller safe limit.
Over Voltage Protection
Bafang · Battery voltage is higher than controller limit.
Hall Sensor Error
Bafang · Motor hall sensor signal is missing or abnormal.
Phase Wire Error
Bafang · Motor phase wire connection is abnormal.
Controller Over Temperature
Bafang · Controller temperature is too high.
Motor Temperature Sensor Error
Bafang · Motor temperature sensor reading is invalid.
Current Sensor Error
Bafang · Controller current measurement is abnormal.
Speed Sensor Error
Bafang · Speed signal is missing or implausible.
BMS Communication Error
Bafang · Battery BMS communication is missing or abnormal.
Communication Error
Bafang · Display and controller are not communicating.
Battery Communication Error
Brose · Battery data could not be read correctly.
Drive Unit Fault
Brose · Drive unit reports an internal operating fault.
Speed Sensor Fault
Brose · Speed sensor signal is not detected correctly.
Temperature Derating
Brose · Motor is hot; controller reduced output to protect system.
Torque Sensor Error
Brose · Torque sensor reading is invalid or unstable.
Battery Voltage Error
Brose · Battery voltage is outside expected range.
Display Communication Error
Brose · Display/controller communication is unstable.
Throttle Fault
Generic / Chinese Controllers · Throttle signal out of expected range.
Brake Sensor Fault
Generic / Chinese Controllers · Brake cut-off signal is active or abnormal.
PAS Sensor Fault
Generic / Chinese Controllers · Pedal assist sensor signal is missing or abnormal.
6KM Walk Mode / Throttle Return Error
Generic / Chinese Controllers · Startup or walk mode signal is abnormal.
Throttle Error
Generic / Chinese Controllers · Throttle voltage is too high, too low, or unstable.
Low Voltage Protection
Generic / Chinese Controllers · Battery voltage dropped below the controller safe limit.
Motor Hall Sensor Fault
Generic / Chinese Controllers · Hall feedback missing; commutation may fail.
Motor Phase Fault
Generic / Chinese Controllers · Motor phase wire signal is abnormal.
Controller Fault
Generic / Chinese Controllers · Controller reported an internal power-stage fault.
Communication Receive Error
Generic / Chinese Controllers · Display is not receiving controller data properly.
Communication Send Error
Generic / Chinese Controllers · Display commands are not reaching controller reliably.
BMS Communication Fault
Generic / Chinese Controllers · Battery management system communication failed.
Headlight / Accessory Fault
Generic / Chinese Controllers · Accessory output has abnormal load or short circuit.
Motor Temperature Sensor Fault
Generic / Chinese Controllers · Motor temperature reading is invalid.
Speed Sensor Fault
Generic / Chinese Controllers · Speed signal is missing or abnormal.
Communication Fault
Generic / Chinese Controllers · Display and controller communication failed.
Motor Phase Short
Generic / Chinese Controllers · Motor phase line may be shorted.
Motor Hall Signal Error
Generic / Chinese Controllers · Hall sensor signal is abnormal or missing.
Brake Error at Startup
Generic / Chinese Controllers · Brake signal was detected during startup.
Controller Communication Error
Generic / Chinese Controllers · Display and controller cannot communicate.