LG PE Error Code: Pressure Sensor Issue Solution
Updated: February 2026
The LG PE error code appears when your washing machine 's water level pressure sensor (pressure switch) is malfunctioning or providing inconsistent readings to the control board. This sensor is crucial for determining how much water is in the drum.
How the Pressure Sensor Works
The pressure sensor connects to an air trap at the bottom of the drum via a thin air hose. As water fills the drum, air pressure in the hose increases, which the sensor detects. The control board uses this information to stop water fill at the correct level. When this system fails, the PE error displays.
Common Causes
PE errors typically result from a clogged or disconnected pressure hose, foreign objects blocking the air trap, excessive detergent creating pressure-sensor-confusing suds, or the pressure sensor itself failing electronically.
Step-by-Step Fix
- Unplug the washer from the electrical outlet
- Locate the pressure sensor (usually near the control board area)
- Follow the thin air tube from the sensor down to the air trap at the tub
- Disconnect the tube and blow through it to check for blockages
- If blocked, clean with warm soapy water or replace if damaged
- Check the air trap connection at the tub for clogs or debris
- Ensure all connections are secure and air-tight
- Reconnect everything and test with a rinse cycle
Sensor Replacement
If the pressure hose and air trap are clear but the PE error continues, the pressure sensor switch itself has likely failed. This electronic component can be tested with a multimeter but typically requires replacement when faulty.
Replacing the pressure sensor is straightforward for experienced DIYers as it's usually accessible without major disassembly. However, professional service ensures correct part selection and proper installation for those uncomfortable working with washer electronics.
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Frequently Asked Questions about LG PE Error Code: Pressure Sensor Issue Solution
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