An oxygen (O2) sensor is an important part of a vehicle’s emissions control system. It measures the amount of oxygen in the exhaust gases, thus, helping the engine control module (ECM) adjust the air-fuel mixture for optimal combustion.
A malfunctioning O2 sensor can lead to poor fuel economy, increased emissions, and even engine damage if not addressed promptly.
Therefore, If you’re experiencing issues with your O2 sensor and can’t replace it immediately, there are a few temporary fixes that might help you get by in the short term.
The temporary fix for a bad O2 sensor is:
- Cleaning the O2 sensor
- Using fuel additives such as fuel injector cleaner or O2 sensor cleaner
- By resetting the car’s ECU
- By using an O2 sensor spacer
Temporary Fix for Bad O2 Sensor
Here’s how to temporarily fix a bad O2 sensor:
Method 1: By Cleaning the O2 Sensor
Over time, O2 sensors can become coated with carbon deposits, which interfere with their ability to accurately measure the oxygen levels in the exhaust gases. However, cleaning the sensor may restore some functionality.
Materials Needed to Clean an O2 sensor are
- Carburetor cleaner or brake cleaner
- Wire brush
- Wrench or socket set
Step-by-step Guide on How to Clean an O2 Sensor:
- The oxygen sensor is usually located on the exhaust manifold or downstream in the exhaust system.
- Use a wrench or socket to carefully remove the sensor.
- Spray the sensor with carburetor or brake cleaner, making sure to remove as much carbon buildup as possible.
- Gently scrub the sensor with a wire brush, being careful not to damage the sensor’s internal components.
- After cleaning, let the sensor dry completely.
- Reinstall it in its original location, ensuring it’s tightened properly.
This may temporarily improve the sensor’s performance and clear the check engine light.
Method 2: By Using a Fuel Additive
Fuel additives can help clean the internal components of the engine, including the O2 sensor. This method won’t fix a completely failed sensor but might help if the sensor is only partially blocked by deposits.
You need a fuel injector cleaner or a dedicated O2 sensor cleaner additive to achieve this cleaning process.
- Add the Additive to Your Fuel: Follow the instructions on the product label. Normally, you’ll pour the additive into your fuel tank before filling up with gasoline.
- Drive Normally: The cleaner will mix with the fuel and help dissolve carbon deposits in the engine and exhaust system. Over time, this may help the O2 sensor function better, though it’s a temporary solution.
Method 3: By Resetting the ECU
The engine control unit (ECU) stores error codes from various sensors, including the O2 sensor. Therefore, resetting the ECU might clear the check engine light temporarily, but it won’t fix the issue.
To reset the ECU, follow the steps below:
- Disconnect the Battery: To reset the ECU, disconnect the negative terminal of your car’s battery. Leave it disconnected for about 15 minutes.
- Reconnect the Battery: After the wait, reconnect the negative terminal. This will reset the ECU, clearing the error codes temporarily.
However, if the O2 sensor is still faulty, the check engine light will likely come back on after a short period of driving.
Method 4: By Using an O2 Sensor Spacer (Non-Fouler)
An O2 sensor spacer, also known as a spark plug non-fouler, can be used to move the sensor slightly out of the exhaust stream. This can trick the ECU into thinking the sensor is functioning properly, at least temporarily.
You will need to purchase an O2 sensor spacer (available at auto parts stores). You can get a good O2 sensor spacer from Amazon HERE.
After purchasing the sensor and having it delivered to you, remove the O2 sensor and screw the spacer onto the sensor. Then reinstall the sensor (with the spacer attached) into the exhaust system.
Drive and monitor your car’s performance. This method should reduce the sensor’s exposure to exhaust gases, which may decrease the likelihood of triggering the check engine light.
However, it’s only a temporary workaround and should not be relied on for an extended period.
As stated above, hese are the temporary fixes for a bad O2 sensor. They are meant to be temporary. A malfunctioning O2 sensor should be replaced as soon as possible to prevent damage to your engine and to ensure your vehicle remains compliant with emissions standards.
Meanwhile, even if you manage to clear the check engine light temporarily, it’s important to monitor your vehicle’s performance. If the light comes back on, or if you notice poor fuel economy, rough idling, or other issues, it’s time to replace the sensor.
A faulty O2 sensor can cause your vehicle to fail emissions test. Therefore, if you live in an area where such testing is required, it’s especially important to replace the sensor immediately.
Conclusion
While these temporary fixes can help you keep your vehicle on the road for a short time, they are not substitutes for a proper repair. Replacing the O2 sensor is the only way to ensure your vehicle continues to operate efficiently and within emissions standards.
