Where is the ho2s located on the 2002 Ford Explorer?

On the 2002 Ford Explorer, the heated oxygen sensors (HO2S) are located in the exhaust system. Specifically, there are typically two HO2S: one positioned before the catalytic converter (upstream) and the other after the catalytic converter (downstream). To access them, you will usually need to lift the vehicle and work from underneath, as they are mounted on the exhaust pipes.