4 Steps On How to Bypass Low Oil Sensor On Generator

The low oil sensor on a generator is one of the essential parts to monitor. Also knowing how to bypass low oil sensor on generator is critical. If you are not monitoring it, then your generator will stop running at some point. However, there are times when the sensor says that it has low oil, and you know for a fact that there is plenty of oil in the tank. When this happens, it could be an issue with the sensor, and all you need to do is bypass it for it to work correctly.

However, if you don’t know what you’re doing, this can be a dangerous process and permanently damage your generator. This article will show you step-by-step instructions for bypassing a low oil sensor without damaging your generator.

What Is a Low Oil Sensor and Why Is It Important?

It is a safety feature in modern generators designed to stop the engine from running when it detects low oil in the generator. It will do this by triggering a switch that shuts off the engine and fuel supply as soon as it detects low oil levels. This feature will also prevent you from starting up your unit again until you fix the problem.

A low oil sensor in a generator is important because it prevents damage to the unit’s engine and will keep you safe. If there is no oil in the generator, it could cause severe damage by stripping out gears or burning up bearings – leading to a costly repair bill later on down the road.

Since low-oil sensors are crucial for keeping your generator running reliably, bypassing them should only be done if necessary.

Video On What Causes a Low Oil Sensor to Shut Off?

A low oil sensor can go off for different reasons. Here are the most common causes:


  • The sensor will signal and shut down the generator’s engine, so you must fix this before bypassing the sensor.
  • The oil filter is clogged and does not allow the proper flow of oil through the generator. You should replace the filter before you add oil to your generator.
  • The unit has been running for a while, and it is time to change the oil. If you don’t change the oil as recommended by your owner’s manual, it could cause problems with the sensor not working correctly and going off.
  • The unit has been sitting for a significant amount of time, and there is no oil in the engine or filter to trigger a low oil sensor indication. It is important to drain the generator and change the filter before starting it up again if this happens.
  • Engine wear. When a generator has been in use for a long time, the engine components wear and tear. The wearing off of these components can restrict the normal flow of oil to the engine resulting in low oil pressure. The low oil sensor will then activate and shut off the engine and fuel supply.
  • A faulty sensor can also cause the low oil sensor on your generator to go off. If you replace the oil and filter, but it keeps coming back, you might need to replace the sensor. A damaged or malfunctioning sensor can be caused by debris or dirt that prevents enough oil flow through the screen or a bypass valve.


If you are sure that your generator has sufficient levels of clean oil, but it’s still shutting off, indicating low oil, it’s time to think of bypassing the sensor. However, bypassing the low oil sensor is not a permanent but a temporary solution to meet your emergency power demands.


How to Bypass Low Oil Sensor Without Damaging the Generator


Observe Safety Precautions

Before you get started, there are some safety precautions that you need to observe. It is important to be aware of the dangers involved in bypassing the low oil sensor, and taking the necessary precautions will ensure that you stay safe while doing this job.

  • Ensure the generator is turned off: Before you start working on your generator’s low oil sensor, you must switch off the engine. Make sure that you’ve completely shut down the fuel supply and the engine has stopped running.
  • Allow the generator to cool down: Even after the engine has stopped running, some generator parts will still be too hot for you to touch even after the engine has stopped running. Keeping the generator in the open air will allow it to cool down quickly.
  • Beware of the moving parts: Do not get your fingers stuck into the moving parts of the generator.
  • Reduce the risk of explosions: Gasoline or propane is flammable. Therefore, you should ensure no electrical sparks, cigarettes, or open flames are near your working area.


How to Bypass The Sensor

There are easy steps to follow when you want to bypass the low oil sensor in your generator safely. Here is how you can do it:


Step 1: Locate the Yellow Wire

All generators have a yellow wire that is connected to the oil sensor. This wire has a clip at one end, and it’s located near the engine’s crankshaft. Or you can also find it near the oil fill cap under the panel.


Step 2: Disconnect the Wire

After locating the yellow line, depending on your generator brand, you may find a green wire connector. Disconnect the yellow wire from the connector by removing the wire connecting the yellow wire and green connector. You will need to use a pair of pliers to remove the wire from its clip gently. This will disconnect the sensor from the engine and turn off the low oil indicator, bypassing the low oil sensor.


Step 3: Cover The End of Wire with Tape

Covering the end with some electrical tape ensures no oil gets into the wire to cause further problems.


Step 4: Start Up Your Generator

Your generator should now start normally and operate without the low oil sensor. Even so, you have to ensure that the generator has adequate oil levels before powering it on.


The above steps will allow you to bypass the low oil sensor on your generator temporarily. You will need to replace the sensor once you are done using it, or if you want a more permanent solution, you can install a new oil level sensor kit. Check out the manufacturer’s website or where you bought the generator for low oil sensor replacement.


Frequently Asked Questions

Can you bypass the oil sensor on generator?

Yes, you can. All generators have a yellow wire that is connected to the oil sensor. If you want to bypass the oil sensor, you will need to be disconnect this wire before starting the generator.


How do you bypass an oil pressure sensor?

You can temporarily bypass the pressure warning light by disconnecting the yellow wire from the oil pressure sensor. You will need to replace it once your generator is not in use.


How do you turn off the oil sensor on a Predator engine?

How to Bypass Low Oil Sensor On Generator

Disconnect the yellow wire from the black wire on your Predator engine. Doing so will disconnect the low oil on/off from the low oil sensor, thereby turning off the oil sensor.


How do you test a low oil sensor?

One of the best ways to test if the low oil sensor in your generator is bad is by checking the lights on the oil pressure gauge. If your car’s “low oil pressure” light is on when the oil in your engine is normal, and your car is running smoothly, then it’s a sign that you have a faulty oil pressure sensor.


How does a low oil sensor work on a small engine?

Small engines have low oil sensors that protect them from running without oil. The sensor stops the engine from running when it detects a low oil level. However, unlike big engines, the low oil sensor allows the engine to run even on small oil, provided the oil pickup gets sufficient oil to keep the system pressurized.


Will a generator start with low oil?

This will depend on whether your generator has a low-oil automatic shutdown feature or not. If the automatic shutdown feature is present, the generator will not start with low oil. The feature stops the engine and prevents it from starting when the oil level goes below a recommended point.


What causes low oil pressure in generators?

Causes of low oil pressure in generators are:

  • Low quantity oil levels
  • The viscosity of the oil is low. The low viscosity can be caused by low-quality oil, oil mixed with fuel or water, and high temperatures.
  • Leakage of oil in the lubrication oil channel
  • A blockage on the oil filter screen and oil pipeline

Any of the above reasons can cause low oil pressure in your generator.


Why won’t my generator keep running?

One of the major reasons why your generator won’t keep running is low oil. When the oil level is low, a generator with a low oil sensor will shut down. To successfully operate the generator, you will have to add more oil. Other reasons why your generator won’t keep running include a dirty or clogged carburetor and worn-out spark plugs.

How do you bypass Honda oil level sensor?

By disconnecting the yellow wire from the connector. Tape the disconnected wire to prevent it from touching the ground.

How do you take the governor off a predator 212?

To take the governor off of a Predator 212 generator, you will need to remove all the bolts holding it in place. These bolts are on the housing cover, and they are typically around a foot long. You can then remove the governor carefully with your hands or use a pry bar.

Where is the oil sensor on a Honda generator?

The low oil sensor on a Honda generator is inside the engine crankcase. However, most of the time, this sensor can get to the bottom of the crankcase and send a wrong signal that the oil level is low.

How do you bypass the low oil sensor on a Honda generator?

When you disconnect the yellow wire from the switch, your generator will run without the low oil sensor. However, before bypassing the low oil sensor, ensure your generator has an adequate oil level. This is a temporary fix; if your generator has a bad low oil sensor, you need to consult a technician or replace the sensor with a recommendable one.

How do you remove an oil level sensor?

Locate where the oil level sensor is and disconnect the yellow wire. At this point, you can comfortably unscrew the two bolts clutching the oil sensor at the bottom of the crankcase. Once the oil sensor is free from the base, you can pull it out.

What are the symptoms of a bad oil pressure sensor?

Common symptoms of a bad oil pressure sensor include:

  •  Low or no pressure reading at the pressure gauge while the engine is running normally
  • Constant blinking of the low oil pressure light
  • When the engine starts overheating and the oil pressure sensor shows a normal reading.

When you start seeing any of the three symptoms above, it’s a symptom of a bad oil pressure sensor.

Can you drive without an oil pressure sensor?

Yes, it is possible to drive. However, this is not recommended. It is advisable to have your car’s oil pressure sensor checked by a qualified technician and, if possible, get a replacement for a bad sensor.

Where is the oil level sensor?

You will find an oil level sensor inside the oil pan. It is located at this point to measure the oil level in the pan before the engine starts. If it detects low oil levels, it sends a warning light to the dashboard.

What is a lop switch?

A lop switch is a low oil pressure switch. It is a protective system that shuts down the engine when oil pressure is low.

How do you check the oil on a Honda GX160?

There is a plug that holds a dipstick on the left side of the engine or next to the muffler. Open it by unscrewing it upwards. The dipstick has a couple of markings showing the low oil level and the maximum line. Your oil level should not be above the maximum line or below the minimum line. Wipe the dipstick clean and dip it inside the hole you removed it from, do not screw it. Remove it and check your oil levels on your Honda GX160.

What kind of oil does a Honda GX390 take?

The recommended oil for Honda GX390 is SAE 10W-30. If it’s an LPG model, the manufacturer prohibits multi-grade oil and insists on using straight 30.

How do you fix an oil sensor?

If you find that your oil sensor is faulty, you will need to install a replacement kit. This includes both new sensors and wiring harnesses required for the proper function of your generator’s low oil sensor.

How do you manually check oil pressure?

All you need to do is get underneath your generator and locate the oil pressure switch. Turn off the engine, disconnect it from its clip on one side of the engine block and check if there are any obstructions between it and where the wire attaches to the sensor in front of it. You can do this by holding a match or candle near the connection point. If the light goes out, there is no blockage that would trigger a low oil pressure warning in your generator.


Final Word

If the low oil sensor is giving you false alarms now and then, the sensor may be faulty, it’s time to think of bypassing it. However, you should only do this when there is an emergency need for generator power and not a permanent solution. Observe safety precautions and follow the easy steps above.

About Steve Stuart

Steve Stuart is an electrical engineer who developed interest on generators during his school years. After school, he became a generator enthusiast. This is after encountering power supply problems at the area of residence where he lived. Power would be on and off and so food would go bad and the room heater would go off especially during winter. After trying the different generator brands for several years, Steve now provides information on the available brands and products in the market today. Based on his experience, he gives the do’s and the don’ts when it comes to generator use.

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