AL23
FG Wilson
Oil Pressure Signal Error
Controller displays AL23 – Oil Pressure Sensor Fault
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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
Failed oil pressure sender, Short or open circuit in sender wiring, Wrong sender resistance range, Faulty controller input
How to Fix / Troubleshooting
Safety first: Stop the generator and isolate battery negative. Allow engine to cool.
- Locate sender: The oil pressure sender is usually near the oil filter on the engine block.
- Inspect connector: Check for oil contamination, corrosion, or loose pins. Clean and reconnect.
- Check wiring continuity: Use a multimeter to verify continuity from the sender to the controller terminal.
- Replace sender: If readings are erratic or out of range, replace with a genuine sender matching the controller's specification.
- Test run: Clear the alarm and start the engine, confirming that oil pressure readings are stable and within normal range.
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Repair Difficulty
Medium
3/5
Required Part
Oil Pressure Sender
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