Where is the oxygen sensor located in a car?
2 Answers
The oxygen sensor is installed on the exhaust pipe of the car's engine. The automotive oxygen sensor is a critical feedback sensor in the fuel injection engine control system, serving as a key component for controlling vehicle exhaust emissions, reducing environmental pollution caused by vehicles, and improving the fuel combustion quality of the car's engine. The oxygen sensor uses a ceramic sensitive element to measure the oxygen potential in various heating furnaces or exhaust pipes, calculates the corresponding oxygen concentration based on the chemical equilibrium principle, and achieves the monitoring and control of the combustion air-fuel ratio inside the furnace to ensure product quality and compliance with exhaust emission standards. It is widely used in the atmosphere control of various coal-fired, oil-fired, and gas-fired furnaces.
An experienced driver tells you that the oxygen sensor is usually hidden on the exhaust pipe. I replaced mine last week—the front oxygen sensor is located near the section of the exhaust pipe that comes out of the engine bay, and on some cars, you need to remove the engine guard to see it. The rear oxygen sensor is positioned further back, typically behind the catalytic converter. For V6 engines, there’s one sensor on each side of the exhaust pipe. If you’re looking for it yourself, be careful because the exhaust pipe can get very hot—it’s best to work on a cold engine. If your car’s check engine light comes on, there’s an 80% chance it’s due to a faulty oxygen sensor causing incorrect air-fuel ratios, which can drastically increase fuel consumption. Last time mine failed, my car burned an extra 2 liters of fuel.
