How to Bypass Co Sensor on Generator [Step-by-Step Guide]

Generators are a pivotal tool to ensure power continuity during outages.

However, one common issue faced by many generator users is the operation of the carbon monoxide (CO) sensor, which may sometimes cease to function correctly or cause the generator to shut down despite safe conditions.

This guide will offer a thorough walkthrough on how to bypass the CO sensor on a generator, effectively overcoming this impediment.

How to Bypass Co Sensor on a Generator

How to Bypass Co Sensor on a Generator

1 . Manipulation of the Electrical Circuit

The electrical circuit of your generator is the heart of how it operates. By understanding and manipulating this circuit, you can bypass the CO sensor.

The step involves locating the circuit responsible for the connection with the sensor and disconnecting it from the system. It’s typically a bundle of wires leading to the sensor.

Once found, the circuit can be manipulated to ‘trick’ the generator into believing the sensor is working as intended.

However, exercise extreme caution during this process to avoid damage to your generator or creating safety hazards.

Remember, this is only a temporary solution and proper maintenance or replacement of the sensor should be sought immediately.

2 . Usage of a Bypass Plug

Using a bypass plug is an alternative method to override the CO sensor on a generator.

A bypass plug is designed to fit into the sensor socket, effectively bypassing the CO detector.

This plug can be found in many hardware stores or online marketplaces. However, remember, this should only be used as a short-term fix.

It is crucial that you operate your generator in open-air environments only when using a bypass plug to avoid the risk of carbon monoxide poisoning.

Immediately seek professional assistance for sensor repair or replacement to ensure safe operation of your generator in the long run.

3 . Implementing a Resistor Loop

This method involves inserting a resistor into the circuit that the CO detector is part of, effectively creating a ‘loop’ that bypasses the detector.

This can be done by identifying the two wires that lead into the CO sensor, disconnecting them, and connecting a resistor of appropriate resistance (typically around 2.2k ohms) between them.

Remember, this should only be attempted with a good understanding of electrical circuits to avoid potential hazards.

Always use extreme caution when handling electrical components, and ensure the generator is completely powered off and unplugged before proceeding.

Lastly, as with any bypass, this should only be used as a temporary solution. Always seek professional assistance for a permanent fix.

4 . Disconnection of the Sensor

A straightforward and commonly used method to bypass the CO sensor in a generator involves its disconnection.

This is achieved by unplugging the wires attached to the sensor, thus interrupting the circuit and disabling the sensor’s ability to communicate with the generator’s system.

It’s important to remember that this should be done when the generator is completely turned off to avoid any electrical accidents.

However, it’s crucial to understand that disconnection of the sensor significantly impacts the safety mechanism of your generator, making this a temporary solution.

Always reconnect the sensor as soon as possible or opt for professional support to avoid CO build-up.

5 . Using a Sensor Simulator

Using a sensor simulator offers an effective method to bypass the CO sensor on a generator.

This device mimics the operational attributes of a functioning CO sensor, thereby tricking the generator into assuming the CO sensor is working correctly.

The simulator transmits the appropriate signals to the generator’s system, facilitating uninterrupted operation.

However, since the actual CO sensor is bypassed, extra caution should be taken to ensure the environment is free from carbon monoxide to prevent hazardous situations.

Always remember, using a sensor simulator should only be a temporary fix and professional repair or replacement of the CO sensor should be done at the earliest.

6 . Applying a Sensor Inhibitor

Applying a sensor inhibitor serves as another viable method to bypass the CO sensor on a generator.

This approach involves the use of a specially designed device that interfaces with the sensor circuit to inhibit its operation, thereby allowing the generator to run uninterrupted.

The sensor inhibitor functions by sending false signals to the CO sensor, simulating an environment with no carbon monoxide present.

This technique is generally simpler and less invasive than modifying the electrical circuit directly.

However, it is important to be mindful of the fact that this method is not a permanent solution and could potentially pose safety risks if carbon monoxide levels are not regularly monitored.

Always prioritize professional repair or replacement of the CO sensor as soon as possible after using a sensor inhibitor.


In conclusion, while navigating a troublesome CO sensor on a generator can be daunting, the methods listed above provide feasible solutions for bypassing the sensor.

Whether it’s manipulation of the electrical circuit, using a bypass plug, or any of the other techniques, you can restore your generator’s operation in the short term.

However, it’s imperative to remember that these are temporary fixes. Carbon monoxide is a silent and lethal gas, and the sensor plays a crucial role in preventing dangerous exposure.


Can I bypass the CO sensor on my generator permanently?

No, bypassing the CO sensor should only be a temporary solution. It’s crucial to professionally repair or replace the sensor promptly due to its vital role in preventing carbon monoxide poisoning.

Where is the CO sensor located on a generator?

The CO sensor is typically located near the exhaust system of a generator. However, the location may vary depending on the generator model.

What is the function of a CO sensor in a generator?

The CO sensor in a generator is designed to detect the presence of carbon monoxide, a dangerous gas, and shut down the generator to prevent exposure.

Is there a possibility of a CO sensor malfunction?

Yes, CO sensors can malfunction due to several reasons, including age, extreme weather conditions, or technical glitches. It’s essential to maintain and check them regularly.

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