Yes there are dozens.
There can be from 1 to 4 depending on the year and engine size which you fail to list.
two
6
Screwed into the exhaust system. Follow the exhaust system from the engine rearward and you will find the oxygen sensor or sensors if it if it has more than one.
This model accord has two oxygen sensors, when in the front in the motor and one under the passenger seat and both can be pretty costly about 100 apiece..
Only one
The 2002 Pathfinder oxygen sensors are critical part of the engine management system. You can find the oxygen sensors in the exhaust system.
where are the oxygen sensors on a 2004 ford escape with a 3.0 engine
The oxygen sensors on all vehicles are uasually located before and after the catalitic converter to monitor your emisions ! Good Luck !
Number 1 is in the engine compartment.
A 2007 Durango has four oxygen sensors.
The oxygen sensors are screwed into the exhaust pipe behind the engine.