The other day the CEL came on so I ran the codes and it came up with O2 sensor in bank 1 circuit malfunction. So the o2 in bank 1 in the front of the exhaust is borked. Anyway, what can I expect for problems with driving around with it like this? Seems that I am already getting poor gas mileage, but are there any other side effects? I plan on replacing it next week, though I need to find a good place to order the part, whats the cheapest place? courtesy-nissan seem pretty low. Anyway, any information you can provide would be great.

 

www.oxygensensors.com for the cheapest (buy OEM type). Bad gas mileage and you might see a little worse engine performance.

 

Crap, is bank 1 left or right side at the front?

 

What was your code?

 

no clue just said o2 sensor bank1 it was one of those readers you plug in, i didn't count the blinks.

 

my light came on today, the code was P 0131 or 0130, i dont remember, but it was my o2 sensor, so i gotta replace this one now. i already replaced the rear o2 sensor, so its only right this son of a gun had to go too...dangit...