Hey all,

After the SES light came up on my 99 maxima indicating a bad o2 sensor I decided to replace all of them, I'm rolling with around 100000 anyways. So I replaced 3/4 the 4th one being on top of the exhaust piping. Anyways, 2 days later the code came back on. The code I have indicates that it's the rear bank sensor 2/2. Is this the one that I couldn't change? If so how the hell do I get to it without dropping the exhaust? Also, in the manual it indicates there is a sensor back near the cat.. I don't see one on my car.. Am I supposed to have one back there, or no?

Thanks,
Erik

 

your car is cali spec, just like mine, it makes everything a PITA!!!!!!!!!! the bank 2 sensor 2 sensor is the downstream sensor on the radiator side of the engine....

 

i cant really advice u since its easy now since i got my ypipe replaced with a warpspeed one

 

Do o2 sensors hurt performance that much?

 

where is the best place to get O2 sensors? my max threw an 0303 code refering to the O2 sensor in the front bank of cylinders. any help is appreciated. not sure how much these are at all. can you just get them at checker, or something??

 

www.oxygensensors.com

 

alright, thanks. i'm gonna jack up the car today and switch the two O2 sensors on the y-pipe. that way i should be able to tell if it is just a busted O2, right? i'll just get a code for the other O2 down by the rear header.
I hope this doesn't have anything to do with my y-pipe. I just put a Budget SS in about a month ago, and had no problems at all. my CEL light just came on last night, so it probably isn't related. I hope...