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-   -   Help locate Altima 2.5S Oxygen Bank1 Sensor 2 (https://x.nissanhelp.com/forums/altima/27973-help-locate-altima-2-5s-oxygen-bank1-sensor-2-a.html)

skynet2014 01-09-2016 11:16 AM

Help locate Altima 2.5S Oxygen Bank1 Sensor 2
 
Long story short, Nissan Altima 2009 sedan 2.5SL, get check engine light on, check the code indicate to change Oxygen Sensor on Bank 1 Sensor 2. down stream sensor.
Opened the hood, only see 1 sensor there, not sure if that is correct 1, can any one help? please see following pic.



http://i67.tinypic.com/2w6z0j8.jpg

http://i63.tinypic.com/14np647.jpg

http://i64.tinypic.com/353aa6u.jpg



Thank you very much.

Dave

bennyb53 01-10-2016 02:02 PM

Remove the heat shield just right of the oil dip stick with a 10 mm socket. The CAT should come to view. The top is sensor 1 and bottom is sensor 2. You will need a 7/8" oxygen sensor socket. Use NGK or Bosch oxygen sensor.

smj999smj 01-10-2016 02:14 PM

I would say use NTK (NGK's brand of Oxygen sensor), genuine Nissan or Denso. I've had some issues with Bosch sensors in Toyotas and Nissans. Soak down the shield bolts as the tend to rust and break when you try to remove them.

skynet2014 01-13-2016 04:54 AM

Thank you, I will check.

skynet2014 01-13-2016 04:55 AM

Thanks for the info. I will avoid Bosch then :)

ThatOneAltima 12-16-2020 12:15 PM

were you able to fix the problem?


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