E15
Wacker Neuson
Fuel Level Sensor Fault
Controller shows E15 and generator shuts down during operation
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Open or shorted fuel level sender, Corroded connector at tank, Damaged wiring harness between tank and controller, Incorrect sender resistance range configured
How to Fix / Troubleshooting
Safety first: Work in a well-ventilated area and avoid sparks near the fuel tank. Disable AUTO mode before servicing.
- Check fuel level manually: Confirm actual fuel level using the tank's mechanical gauge or dipstick to rule out a real low-fuel condition.
- Inspect sender wiring: Locate the fuel level sender on the tank. Inspect the connector for corrosion or loose pins. Clean and reseat.
- Measure sender resistance: Disconnect the sender and measure resistance across its terminals while moving the float. Compare to the range specified in the manual. Replace if open, shorted, or erratic.
- Check harness continuity: With the battery disconnected, test continuity from the sender connector to the controller plug. Repair any open or shorted wires.
- Controller configuration: Ensure the controller is set for the correct sender type (e.g., 0–90 Ω, 10–180 Ω) if configurable.
- Clear E15: After repairs, reset the controller and verify that fuel level displays correctly.
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Repair Difficulty
Medium
3/5
Required Part
Fuel Level Sender
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