I threw a code today on the way home from work. Pulled the code manually off the computer and it read 0303 - left bank O2 sensor. Which one is it? I was thinking the one that is accessible under the left front wheel well, but the parts picture from Courtesy Nissan makes it look like the front one is the LH or driver's side sensor. Also...is factory the best way to go to get the entire harness and not have to splice anything? I was going to look at motivate.ca, but the site is down or gone. Any help would be appreciated.

 

Here's a diagram that should clear things up:


I replaced mine with universal sensors which did require splicing, and everything has been great for 2+ years now. OEM sensors with the harness would obviously be the easier and preferred choice if you don't mind spending a little more. The best place to buy the sensors is www.oxygensensors.com

The site is still up, but you may have mistyped it. the URL is http://www.motorvate.ca

 

ya its the sensor closest to the radiator. I just buy the bosch universal ones and splice them. Ive found them for $35 on ebay new.

 

sensor behind rad

 

sorry to give you some crap about this but isnt a p0303 a misfire cylinder 3?

 

P0303 is, yes.

 

FYI - Sometimes the O2s just get carbon build-up and don't need to be replaced. Have had this issue on and off with our Maxi. Removing sensor, cleaning with Gumout and replacing sometimes solves it? If not - then just replace it...

 

well guys if he has a p0303 then this issue has nothing to do with the 02 sensor, he would need to start looking at cylinder 3. Maybe I am reading his post wrong. A bit confused at the moment.

 

In his post he said that he pulled the codes manually, meaning he didn't go to autozone or whatever, he used the screwdriver and counted the flashes - 3 long, 3 short = front left o2 sensor.

 

If it actually tells you which cylinder, it going to be the coilpack. Test it with the ohm meter. Better yet, i would switch it with another cylinder and see if the problem follows it.

 

He doesn't have a coil problem. 0303 and P0303 are not the same.