The 2002 Pathfinder oxygen sensors are critical part of the engine management system. You can find the oxygen sensors in the exhaust system.
the part no. are 64,2387,79856
And they are expensive to replace... (i replaced one @ $400)
There are two oxygen sensors on a Nissan Sentra. This vehicle is an ultra-low emission car, thus needing only two oxygen sensors.
4 oxygen sensors (2 front and 2 rear)
The "Service Engine Soon" light on a 2002 Nissan Pathfinder indicates that the vehicle's onboard diagnostic system has detected a problem. Common issues can include problems with the engine, emissions system, or sensors such as the oxygen sensor or mass airflow sensor. It's advisable to use an OBD-II scanner to retrieve the trouble codes, which will help pinpoint the issue. Addressing the underlying problem promptly can prevent further damage and ensure the vehicle runs efficiently.
it has two one in front of engine another one underneat in the muffler pipe
IN THE EXHAUST SYTEM meaning a 4 cylinder has 2 a v6 has 4. IN THE EXHAUST SYTEM meaning a 4 cylinder has 2 a v6 has 4.
The 1994 Nissan 300ZX is equipped with four oxygen (O2) sensors. It has two upstream sensors located before the catalytic converters and two downstream sensors located after them. This configuration helps monitor and optimize the engine's air-fuel mixture and emissions performance.
The 2005 Nissan Maxima is equipped with four oxygen (O2) sensors. There are two upstream (pre-catalytic converter) sensors and two downstream (post-catalytic converter) sensors. These sensors play a crucial role in monitoring the exhaust gases and helping to optimize engine performance and emissions.
If the check engine light on your 1999 Nissan Pathfinder is illuminated, it could indicate a variety of issues ranging from a loose gas cap to more serious engine problems. It's advisable to use an OBD-II scanner to retrieve the diagnostic trouble codes, which can help pinpoint the specific issue. Common causes include faulty oxygen sensors, catalytic converter issues, or ignition system problems. Addressing the underlying problem promptly can help prevent further damage and ensure optimal vehicle performance.
Assuming you have the V-6 engine, it has two downstream (after the cats) O2 sensors and two upstream (before the cats) Air/Fuel Ratio Sensors. So the answer to your question is two O2 sensors.