On the exhaust pipe. One is under the "HOT" plate, one is under the engine.
There are 2 oxygen sensors.1 is in front of the catalytic coverter and 1 is located behind the coverter
The 1996-2001 Elantra's have two sensors the upstream and downstream the upstream sensor is located the exhaust manifold and the downstream is located behind the catalytic converter.
The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter
The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter
The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter
The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter
The Catalytic converter is located underneath the vehicle right behind the upstream oxygen sensor
As far as I know, there are 4 oxygen sensors on a 2001 Hyundai Santa Fe. 1 upstream sensor and 1 downstream sensor located in the front manifold/exhaust and 1 upstream and 1 downstream sensor located in the rear manifold/exhaust.
The air flow sensors are located on the intake tract between the air filter and the throttle body.
O2 sensors on all vehicles are located in the exhaust system. Start at the exhaust manifold(s) and visually work your way back, you will find them.
replace it..It should screw right in with a wrench.
Oxygen sensor location: If your car is a 2.0l 4 cyl there is one before and one after the catylic converter which is located about midway of the passager door.