Welcome to our guide all about the LG washing machine PE error code—a topic that’s relevant whether you own an LG front load washer or a top load washer. If you’ve ever wondered what the PE error means or how to tackle it specifically, you’re in the right place. We’re here to explain the PE error and show you step-by-step how to troubleshoot and fix it on your LG washing machine.

LG Washing Machine PE Error Code solutions

So, let’s jump right in and discover how to wave goodbye to this PE error code.

LG Washing Machine PE Error Code: Meaning, Causes and Solutions

The PE error code on your LG washing machine usually points to an issue with the water level pressure sensor. The term “PE” stands for “Pressure Error,” indicating that your washer is facing challenges when it comes to maintaining the appropriate water level. In technical terms, this error indicates that the main board is having trouble either sending or receiving signals from the pressure sensor.

This hiccup could be due to an open or short circuit in the pressure sensor’s (assembly or wiring). In essence, the PE error is your washer’s way of letting you know that its communication with the pressure sensor isn’t going as smoothly as it should.

What’s Causing the PE Error on Your LG Washing Machine?

Let’s break down each of these factors that can lead to the PE error code on your LG washing machine:

  • The pressure sensor wiring harness is a collection of wires that connect the pressure sensor to the main board of your LG washing machine. If this wiring harness is faulty, it means there might be disruptions in the flow of electrical signals between the pressure sensor and the main board. These disruptions can trigger the PE error code.
LG PE Error Pressure Sensor Communication Errors
  • The pressure sensor hose is responsible for transmitting pressure-related information from the drum to the pressure sensor. If there’s a pinhole in this hose, it can create inaccurate pressure readings.
  • The air chamber is a part of the pressure system that helps regulate the water level in your washing machine. If this chamber gets clogged with debris, dirt, or soap residue, the pressure readings can be disrupted.
PE Error Code The Exact Location Of The Air Chamber
  • The pressure sensor itself may have developed a fault over time. This sensor is responsible for converting air pressure changes into electrical signals that the main board can interpret. If the sensor becomes defective, it might provide inaccurate readings or fail to send any signals at all.
  • The main board acts as the brain of your washing machine, processing information from various components, including the pressure sensor. If the main board is struggling to send signals to the pressure sensor or receive signals from it, it disrupts the communication loop.

Solutions for Resolving the LG Washing Machine PE Error Code: Troubleshooting and Fixing Guide

Always unplug your washing machine from the power source before attempting any troubleshooting or repairs.

If you encounter the PE error code on your LG washing machine, don’t fret! Here are some troubleshooting steps tailored to address the specific causes of the issue:

Check the wiring.

  • Carefully inspect the wiring harness that connects the pressure sensor to the main board. Look for any signs of damage, such as frayed wires or disconnected plugs.

If you find any issues with the wiring, securely reconnect any loose connections. If the harness is damaged, consider replacing it with a new one.

Inspect the pressure sensor hose.

  • Examine the pressure sensor hose for any visible holes, cracks, or damage. If you spot a pinhole, it’s likely causing the issue.

If the hose has a pinhole, replace it with a new one. Make sure the replacement hose is properly connected at both ends.

Clear debris from the air chamber.

  • Locate the air chamber within the washing machine. Clear out any debris or foreign objects that might be clogging it.

Test for Airflow: Blow gently into the air chamber to ensure that air can flow through it freely. If airflow is restricted, it might need further cleaning or unclogging.

Try to reset your LG washing machine.

  • Sometimes, a simple power cycle can help reset the main board. Turn off the washing machine, unplug it from the power source, wait for 10 minutes, and then plug it back in and turn it on.

Check the pressure sensor.

  • Check the pressure sensor, and if the test indicates a faulty sensor, consider replacing it with a new one compatible with your machine’s model.

Advanced Troubleshooting Steps for LG Washing Machine PE Error Code:

If you’re ready to tackle the PE error code head-on, follow these advanced troubleshooting steps:

Check pressure switch connections:

  1. Inspect the connections at the main board and the pressure switch. Ensure they are securely connected and free from damage.

Resistance Reading:

  1. Unplug the appliance from the power source.
  2. Measure the resistance between Pin 1 and Pin 3 on the main board. It should fall within the range of 20 to 25 ohms. If yes, proceed to the next step.
  3. If not and you encounter an open circuit, disconnect the harness from the pressure sensor and recheck the resistance. If it’s now within range, suspect a harness issue. If not, consider replacing the pressure sensor.

Capacitance Reading:

  1. Take a capacitance reading between Pin 1 and Pin 2, and between Pin 2 and Pin 3 on the main board. Both readings should be around ~21.9 nF [~21.9 NanoFarad]. If they are, move to the next step.
  2. If you find an open circuit, disconnect the pressure sensor harness and recheck the capacitance value. If it’s normal now, suspect a harness issue. If not, consider replacing the pressure sensor.

Voltage Measurements:

  1. Plug in the unit and power it on. Keep the pressure sensor connected.
  2. Measure the voltage between Pin 2 and Pin 3, and between Pin 2 and Pin 1 on the main board. Both readings should fall between 2.4 and 3.1 Vdc.
PE Error Voltage Measurements

Frequency Measurements:

  1. Disconnect the pressure sensor hose.
  2. Measure the frequency between Pin 2 and Pin 1, and between Pin 2 and Pin 3 on the main board. The reading should be around 26 KHz, and the value should change according to pressure changes.
PE error code Pressure Sensor Feedback Signal Measurements

By carefully executing these advanced troubleshooting steps, you’ll be delving deep into the technical aspects of the PE error code.


The LG washing machine PE error code might seem like a puzzle, but armed with the right knowledge, you can tackle it with confidence. We’ve explored the potential causes, from faulty pressure sensors to disrupted communication pathways. By following the advanced troubleshooting steps outlined here, you’ll be well-equipped to identify and resolve the issue at its root.

Your 3 Top FAQs about the LG Washing Machine PE Fault Code

Yes, the PE fault error code can appear on both LG front-load and top-load washing machines. It’s a universal indication of a pressure-related issue in the machine.

While some errors can be resolved with a simple reset, the PE fault code usually requires troubleshooting and addressing the underlying issue. It’s recommended to follow the steps in the troubleshooting guide for a lasting solution.

The PE fault code can arise due to various factors, including pressure sensor malfunctions, wiring issues, or clogged components. It’s possible for these problems to develop over time, leading to the sudden appearance of the error code.

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