2002 Nissan Quest "oxygen sensor" Questions

...Oxygen Sensor Circuit High Voltage (Bank1, Sensor2) P0139 - Oxygen Sensor Circuit Slow Response (Bank1, Sensor2) The Heated Oxygen Sensor (1 or 2) located rear of catalytic converter produces an ...

oxygen sensor twice but the light still on I can only assume that you previously had the trouble codes read and you needed to change the knock and oxygen sensors. Have the codes read again to see what

oxygen sensor.  When warm it goes into closed loop, with the oxygen sensor controlling the fuel mixture.  Replace the sensor.           

...Oxygen sensor at the parts store because they are different. Napa Part # DEN 2344701 for the DENSO one that is after the catalytic converter. You will see it sticking out of the exhaust pipe right ...

...oxygen sensors because we thought that could be the problem i guess it wasnt...we dont have alot of money thats why we came to this website looking for help Thank you might be time to get a tune up ...

...oxygen sensor checked. A faulty oxygen sensor prevents the computer from being able to determine the fuel/air mix ratio. This could also cause the symptoms you have described. I hope this helps

Oxygen sensor (upstream), Where is that located? and is this the first place to start?? thanks sounds like it , the sensor should be on the exhaust somewhere,whith wires on it check enging light p0325

...Look for the oxygen sensor on your exhaust system....most likely on the catalytic converter. Unscrew it and unplug it from it's harness. Screw in the new one and plug into the harness.

...sensor weak, replace it, will be the one after the caliltice converter. There was a factory service bulletin regarding these codes and upgraded replacement parts (oxygen sensors). Since these parts ...

is known as a "cold start" problem. common possibilities include a restricted fuel filter, clogged or dirty injectors, or even a problem with the coolant temperature sensor (CTS) or oxygen (O2) sensor