Vacuum shows E09, runs only a few seconds then stops, battery indicator appears normal

Safety first: Remove the battery before any inspection. Do not bypass current sensing components; they are critical safety devices.

• Rule out blockages: First ensure there are no airflow blockages or brush jams that could cause genuine overcurrent.
• Test on low power: If the vacuum runs longer on the lowest power setting but still triggers E09, the current sensing circuit may be misreading.
• Visual inspection: If you can access the PCB, look for burned or cracked resistors near the battery input and motor driver area. Do not attempt component-level repair unless qualified.
• Component replacement: In most home repair scenarios, the entire main PCB or motor unit is replaced rather than individual current sense parts.
• Seek service: Because this fault affects safety and battery protection, have the unit serviced by Bosch or a qualified technician.