4 oxygen sensors (2 front and 2 rear)
How many oxygen sensor on your 1999 3.5 rl?
The 2000 Nissan Pathfinder has a total of four oxygen sensors - two before the catalytic converter, and two after the converter. The front sensors have 3-wires, and the rear sensors have 4-wires. For a good quality OE-style sensor, they'll cost around $100 each.
There are 2 sensors The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
And they are expensive to replace... (i replaced one @ $400)
an o2 sensor is the same as an oxygen sensor. vehicles can have up to 4
2
2
The oxygen sensor is one of many things that could turn the check engine light on.The oxygen sensor is one of many things that could turn the check engine light on.
2 a upstream and downstream
At least two.
Two, an upstream and a downstream oxygen sensor.
A 1999 Chevy Tahoe typically has two oxygen sensors. One is located before the catalytic converter (upstream sensor), and the other is located after the catalytic converter (downstream sensor). These sensors monitor the oxygen levels in the exhaust gases to help the engine control module adjust the air-fuel mixture for optimal combustion efficiency and reduced emissions.