Oxygen Sensor
Electronic fuel injection requires input sensors in order to calculate and direct the fuel injectors to provide the proper amount of fuel and keep the air/fuel mixture at the optimum ratio (ex. 14.7:1 for gasoline). One important sensor that helps provide this input is the oxygen sensor. Threaded into the exhaust manifold/header, exhaust pipe, and / or catalytic converter assembly, the oxygen sensor is submerged into the exhaust gas stream. The sensor element compares the amount of oxygen between the outside air and the exhaust gas and converts the difference to a voltage signal. This signal is sent to the engine ECU, letting it know if the exhaust is too rich or too lean. The ECU then makes an adjustment to the output signal it sends to the fuel injectors, correcting the fuel mixture. This process happens over and over as you drive your vehicle to keep the air/fuel at optimum level. Over time, oxygen sensors wear from age and carbon buildup, requiring replacement.
When choosing a replacement oxygen sensor, confirm the year, make, model, and engine of your vehicle. Next, confirm which oxygen sensor is in need of replacement as most vehicles have between one and four (for example bank 1, bank 2, upstream, downstream, etc.) From the remaining compatible options, choose the sensor that meets your needs and budget. For aftermarket and custom setups and use, choose the option that is compatible with your fuel injection setup or gauge. Early fuel injection and gauges used a narrow band sensor, while present day setups primarily use wide band sensors. Don't forget to purchase an oxygen sensor socket and any other tools needed to complete installation.
JEGS offers a large offering of oxygen sensors from top manufacturers including Denso, Delphi, Walker Products, NGK, JEGS, and many others. Each oxygen sensor is built from high-quality components and assembly to provide long service life and accurate input data that will give your engine the best performance possible.