about a month ago, my check engine light came on, and i got a code for a rear bank O2 sensor... over the last couple of weeks however, the light has only been coming on in the morning when the car is really cold, and then by the middle of my drive to work, it goes off. and later in the day, when i leave work at 3-4ish, the light doesn't even come on at start-up.. any input?

i have a 97 se

 

so the light only comes on in the morning during cold start ups... correct?

 

You're right, this DOES belong in the 4th gen section.

 

yes, the light only comes on upon start up when it's cold; it will stay on for my whole drive to work, about a half an hour from 6:30 to 7, and then it'll never be on when i get back in my car at 3 or 4 in the afternoon. sometimes i'll work until 10 at night, and the light will come on when i start the car at night (when it's cold again)

 

Did you wanted LESS help?

 

Not only does it belong there, it's also there...

http://forums.maxima.org/showthread.php?t=550181