This article was co-authored by Matthew Rava and by How.com.vn staff writer, Dan Hickey. Matthew Rava is an Auto Repair Expert and the Co-founder & Head of Marketing of Brakes to You. He specializes in auto repairs that concern brakes. Matthew earned a BS from West Chester University of Pennsylvania.
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Your Check Engine light is on, your car is guzzling gas like crazy, and is that smoke coming out of your exhaust? The culprit might just be one of your O2 (oxygen) sensors—small, spark plug-sized machines that measure the amount of oxygen leaving your engine through the exhaust. When they get dirty or damaged, your engine can’t tell how much air is inside of it compared to the amount of fuel, leading to a variety of possible problems. In this article, we’ll walk you through all the symptoms of a bad O2 sensor and the mechanics behind them so you get them replaced before your engine gets damaged.
Things You Should Know
- Bad O2 sensors may lead to excess fuel in your engine, causing decreased fuel efficiency and possibly black smoke or sulfuric smells from the exhaust.
- Over time, your engine may also start stalling, rough idling, or making pinging and knocking noises as a result of incorrect air-to-fuel ratios.
- Eventually, a bad O2 sensor will cause very high emissions or even the complete failure of your catalytic converter.
Steps
Expert Q&A
Tips
Warnings
- It’s safe to drive with bad O2 sensors for a short while until you can get them serviced or replaced. However, prolonged driving with faulty O2 sensors can cause engine damage that may lead to engine failures and accidents on the road.[12]Thanks
References
- ↑ https://cartreatments.com/bad-oxygen-sensor-symptoms-replacement-cost/
- ↑ https://cartreatments.com/bad-oxygen-sensor-symptoms-replacement-cost/
- ↑ https://www.cars.com/articles/when-should-the-oxygen-sensor-be-replaced-1420663031800/
- ↑ https://completecar.ca/maintenance/signs-of-a-bad-o2-sensor/
- ↑ https://completecar.ca/maintenance/signs-of-a-bad-o2-sensor/
- ↑ https://www.enginebuildermag.com/2021/07/oxygen-sensors-tuning/
- ↑ https://mechanicbase.com/engine/oxygen-o2-sensor-symptoms/
- ↑ https://cartreatments.com/bad-oxygen-sensor-symptoms-replacement-cost/
- ↑ https://mechanicbase.com/engine/oxygen-o2-sensor-symptoms/
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