Familiar Signs of an O2 Sensor Failure in Your Volkswagen

Familiar Signs of an O2 Sensor Failure in Your Volkswagen

Volkswagens are recognized for their distinguishable designs and safety. They provide drivers with a smooth and comfortable ride. VW's are highly dependable but do see some common component failures such as O2 sensor failure.

The O2 sensor is also known as the oxygen sensor. It is a critical component of the exhaust system. Its function is to measure oxygen levels. This helps the computer determine the proper air to fuel ratio. Without the correct ratio, the performance of your Volkswagen will be greatly impacted.

If the O2 sensor fails, the combustion process in the engine will be affected. This can lead to high emissions, and damage to the engine and catalytic converter.

Symptoms of O2 Sensor Failure in Your Volkswagen

If the O2 sensor in your Volkswagen is failing, it needs to be replaced immediately. The sensor is essential for controlling your car’s fuel economy, emissions, and performance. Taking care of the issue right away will help prevent additional component damage and failures.

The older your Volkswagen, the more prone it is to O2 sensor failure. Below are some of the signs of O2 sensor failure in a Volkswagen.

●      Rough Idling Engine: When your engine begins to idle roughly, there is an issue. One of the most common causes is a failing oxygen sensor. The rough idle is produced by an incorrect air-to-fuel ratio. When the engine is not getting the proper ratio, you may also notice hesitation and a lack of power.

●      Backfiring or Stalling: An O2 sensor that is failing can disrupt the functions of the engine. This may cause the engine to misfire or stall. Misfires can damage the engine. Stalling can be dangerous and lead to an accident.

●      Odor of Rotten Eggs: If the O2 sensor is failing, you may notice a pungent odor of rotten eggs coming out of the exhaust. The smell can enter the interior of the car.

●      Reduced Fuel Economy: If your Volkswagen is burning more fuel than usual, it could be due to a failing oxygen sensor. Since the sensor is not able to provide the correct information, the engine can burn more fuel than usual.

●      Failed Emission Test: Your Volkswagen can fail an emissions test when the oxygen sensor is going bad. This is because it is generating a high level of carbon emissions. You may not even be experiencing any other signs of O2 sensor failure.

●      Overheating Engine: An overheating engine is not the most common symptom of a failing O2 sensor, but it can occur. The overheating happens when the engine constantly burns too much fuel. If your engine ever overheats, pull safely off the road, and turn the engine off. Driving with an overheating engine can lead to permanent engine damage.

●      Triggered Check Engine Light: Anytime your car’s computer recognizes there is an issue, it can trigger the check engine light. This can happen for a number of different reasons. If your check engine light is illuminated, come see our expert mechanics. They will run a diagnostic scan to determine the cause of the triggered light.

Is it safe to drive with a failing O2 sensor?

You can drive your car with a failing O2 sensor, however, we do not recommend that you do so. Continuing to drive your Volkswagen with a bad O2 sensor can cause additional damage which will lead to a higher service bill. Your car will also be producing more pollutants that are harmful to the environment.

Professional O2 Sensor Replacement by M Service

Volkswagen O2 Sensor Replacement

As your vehicle ages, it is more susceptible to O2 sensor failure. Since oxygen sensors are known to wear out over time, we suggest replacement if your Volkswagen is 15 years old or older. It is also recommended that you have it replaced every 60,000 to 90,000 miles. Having the O2 sensor replaced will help increase your fuel economy and reduce pollutants.

Contact us today to schedule O2 sensor replacement in your Volkswagen. Our friendly, knowledgeable mechanics will make your visit as smooth as possible. M Service Inc. is conveniently located in Walnut Creek, CA. Come visit us at 2008 Mount Diablo Blvd. or call us on 925-932-8744.


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