The oxygen sensor is one of the most important sensors on your vehicle. It monitors the amount of oxygen in the engine’s exhaust gas and is usually located on the exhaust manifold. Most oxygen sensors operate like a small battery. Differences in oxygen content between the sensors' inner and outer surfaces cause it to generate a small voltage signal. The sensor is electrically heated internally for faster switching when the engine is running. When there’s a lot of oxygen (lean) present, the sensor produces a low voltage signal; when there’s little oxygen (rich), it produces a signal of higher voltage. By monitoring the oxygen content and converting it to electrical voltage, the sensor acts as a lean-rich switch.
If you’ve noticed a decline in your engine’s performance in addition to stalling or backfiring, it could be time to replace your O2 sensor.
Here’s What You’ll Need:
Every vehicle is different. Always follow the owner’s manual when it comes to maintenance and repairs.
Safety should be your number one priority. Don’t smoke, drink alcoholic beverages, or wear a necktie while working on the car. Watch out for hot objects, sharp instruments, hazardous materials and other potential safety hazards in and around your workspace.
Don’t work with a Philips when the job calls for a flat. Substituting tools can compromise your safety or your vehicle’s performance.
Finally, when the fun turns to frustration, or if the job requires specialized knowledge beyond your capabilities, please do not attempt it yourself. Talk to a professional mechanic or installer.
