How to Fix Upstream Oxygen Sensors?

Answer Your vehicle's computer uses oxygen sensors to monitor and adjust the ratio of fuel and air being pumped into your engine's combustion chambers. Newer vehicles--post 1990, typically--have at least ... Read More »

Top Q&A For: How to Fix Upstream Oxygen Sensors

Difference Between Upstream & Downstream Oxygen Sensors?

All post-1996 vehicles have a lot of emissions equipment, including oxygen sensors. Most emission-controlled cars have two to four oxygen sensors, depending on the amount of cylinders and exhaust p... Read More »

How to Fix the Upstream Oxygen Sensor on a VW?

The oxygen sensors on your VW are used by your vehicle's computer to monitor and adjust the fuel-to-air ratio in your engine's combustion chambers. The upstream sensor measures the emissions flowin... Read More »

How to Replace an Upstream Oxygen Sensor?

Ever since the 1990s, automobiles have typically come equipped with two oxygen sensors on their exhaust manifold--labeled the "upstream" and the "downstream" oxygen sensors. Oxygen sensors are esse... Read More »

How to Fix the Upstream Oxygen Sensor on a VW Cabrio?

Fixing the oxygen sensor in your VW Cabrio is critical to maintaining an efficient and smoothly running engine. There are two oxygen sensors in your Cabrio, an upstream and downstream sensor. The u... Read More »