Oxygen sensors require a special socket, unless it is easily accessible to get a 7/8 open end wrench on the sensor. This depends on which engine is in your car. There are several sensors depending on engine size in the exhaust manifold and the exhaust pipe before and after the catalytic converter.
The o2 sensors on the 2002 Pontiac Grand Am GT are found screwed into the exhaust pipe. There are 2 of these on the 2002 Grand Am GT.
Yes, you unplug and unscrew them.
All the O2 sensors are threaded into the exhaust system at various points.
There are two.
That vehicle has several O2 sensors and they are all threaded into the exhaust system at various points.
2 upstream and 2 downstream for a total of 4 O2 sensors.
four
There are two o2 sensors made for the 2001 Pontiac Aztek. Both are located on a exhaust piping of the vehicle. One is closer to the exhaust manifold, while the other is closer to the catalytic converter.
there are 4 o2 sensors
If you mean o2 sensors, there is one. It is located on the exhaust manifold on the back side of the engine. Gm started the two o2 sensors around 94-95 when obdII was adopted.
Refer to the user and service manual to see where the Oxygen sensors are on the 2002 GMC Yukon 4.8.
The O2 sensors that are the closest to the engine will be the up stream ones. The ones that are further away from the engine are the down stream sensors.