Back to all

Making Sense of the O2 Sensor (Oxygen Sensor Replacement)

September 28, 2025

As you know, today’s vehicles rely on a lot of computers in them to keep them running clean and efficiently.  Those computers depend on information delivered by several sensors throughout the engine and exhaust system.  And one of the most important is the oxygen sensor.  

Known as the O2 sensor for short, it looks for too much unburned oxygen that has made it into the exhaust. That signals something isn’t right with the engine’s air-fuel mixture.  The sensor sends signals to the engine’s computers, which can then make adjustments to make sure the engine is running as it was designed to.

Some vehicles can have several O2 sensors, and since they can measure oxygen at various points in the combustion/exhaust process, the computers can pinpoint where the problems lie.  For example, an O2 sensor can detect how much oxygen is coming out of the engine’s combustion chamber, and another one can measure oxygen coming out of the catalytic converter.

As you can see, it’s important that those O2 sensors are working correctly.  If they’re not, the computer is getting bad information.  Garbage in, garbage out. That can result in lousy fuel economy and excess pollution coming out of your tailpipe. It can also affect your vehicle’s performance.  Sometimes your Check Engine light will illuminate when one of your O2 sensors goes bad.  Or you may notice your engine misfiring or idling roughly. 

If you notice any of these symptoms, bring your vehicle on in, and a technician will pinpoint the trouble spot.  

Top Tech Auto Repair Clawson
664 S Rochester Rd
Clawson, Michigan 48017
248-589-0980
http://www.toptechautorepairclawson.com

Need Service?

More articles from Top Tech Auto Repair Clawson

T for Transmission, T for Trouble (Automatic Transmission Trouble Signs)

May 10, 2026

One of the hardest working components of your vehicle is its transmission, shifting gears up and down when you need it to. The transmission is vital to your vehicle driving properly, and if you start to see signs of problems in it, its best to have them fixed earlier rather than later. (Since ne... More

Blind Spot Safety for Clawson Driving

May 3, 2026

Blind spots may be a good thing when it comes to a spouse's annoying habits, but when driving an automobile in Clawson, they are definitely to be avoided. So, while it's not good marital advice, it's good auto advice to minimize your own blind spots and stay out of other Clawson drivers' blind ... More

Straight to the Point (Alignment Signs of Problems)

April 26, 2026

Its just common sense that your vehicle will drive better if all the wheels are lined up with each other and the road the way the engineers intended. When theyre not, that is called being out of alignment. Here are some signs that your alignment has problems. Your steering wheel isnt straig... More