Display shows E12, and the generator shuts down after a few minutes of running under light load.

Safety first: Stop the generator, allow it to cool, and keep away from open flames when working with fuel.

• Check fuel level: Open the fuel cap and visually confirm the fuel level. Refill with clean fuel if low, following Einhell's recommended fuel type.
• Inspect tank vent: Ensure the fuel cap vent hole is not blocked. A blocked vent can cause a vacuum in the tank and fuel starvation. Clean the vent with compressed air or replace the cap.
• Tap the tank gently: Lightly tap the side of the fuel tank near the level sender to free a sticking float. Do not use excessive force.
• Check sensor wiring: Locate the fuel level sensor connector under or beside the tank. Inspect for loose pins or damaged wires. Reseat the connector.

If E12 continues with a full tank and a clear vent, the fuel level sensor may be defective and should be replaced with an Einhell‑compatible sender unit.