Where is the upstream oxygen sensor on a car?
Where is the upstream oxygen sensor on a car? The upstream oxygen sensor is located before the catalytic converter. This measures the level of pollutants coming directly from the engine. It also senses any raw, unburned fuel coming from the combustion chambers. The downstream oxygen sensor is located directly after the catalytic converter. How does the O2 sensor work in a Dodge Caravan? The O2 sensor sends information to the ECU, which allows it to adjust the fuel mix as necessary. By adjusting the mix, the computer is able to maximize performance, while minimizing fuel consumption and emissions. Where is...