Vacuum shows E16 and shuts down when the motorized accessory (e.g., mini turbo brush) is attached; runs fine without it.

Safety first: Remove the battery and detach the accessory before inspection.

• Step 1 – Test without accessory: Confirm that the vacuum runs normally with no attachments. This isolates the fault to the accessory.
• Step 2 – Inspect accessory brushroll: Open the mini motorized tool or other powered accessory. Remove hair and debris from the brushroll and end caps. Ensure it spins freely.
• Step 3 – Check accessory connector: Examine the electrical connector pins on both the accessory and wand for bent or burnt contacts.
• Step 4 – Replace accessory: If the accessory still causes E16 after cleaning and the brushroll is free, its internal motor or PCB is likely shorted. Replace the entire accessory with a compatible Princess motorized tool.
• Step 5 – Inspect wand wiring (if multiple accessories fail): If all powered accessories trigger E16, the wiring inside the wand or the accessory power driver on the main PCB may be faulty and require professional service.