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  1. #1

    Default change your O2 sensor !

    My Nissan Sentra was acting up when the engine was between cold and hot doing all kinds of funny things.

    Changed my idle air control valve which helped a bit. There is three other things it could have been too. The car's computer, a valve that opens like a shutter when the car starts to warm up and thermo sensor in the coolant line.

    also possibly the o2 sensor but the car wasn't showing a code.

    well on chance I ordered a direct Japanese replacement for my o2 sensor to swap out the Bosh one I had installed ages and ages ago.

    First thing I noticed is the replacement is a lot longer with a lot of large ports unlike the puny Bosh sensor with it's tiny ports and a short stem.

    also that the Bosh sensor was half plugged with car emissions over the years I had it in.

    Not a hard thing to do if you saw how tiny the inlets were to the sensor.

    Got the old one out and the new one in without to much trouble thankfully

    wonder what a Nissan dealer would have charged for this very easy replacement ?

    What a difference it made !

    A world of difference

    It isn't absolute perfect because of the cars age and other sensors mind you but I can honestly say it's a 200 % difference to what it had been.

    car has regained all it's old power and then some and idles FAR BETTER

    I wasn't going to change the 02 sensor out because it wasn't throwing codes as some car forum members said

    BUT apparently the 02 sensor needn't throw any codes before it gets pretty crappy !

    Moral of the story change your 02 sensors out even when they don't throw any codes

    You will be glad you did.

  2. #2
    Join Date
    Jun 2011
    Peoples Republic of NY

    Default Re: change your O2 sensor !

    The O2 sensor(s) provide feedback information to the OBDII system to aid in adjusting fuel. There are typically a minimum of 2 for each bank. One before the catalytic converter and one after. A 4-cylinder like the sentra has one "bank". A V-8 or V-6 is an example of what has two banks. Now late model vehicles have THREE sensors for each bank. One pre cat, one post cat, and one for aging. Imagine replacing all six on a V-8. Bring you checkbook !

  3. #3

    Default Re: change your O2 sensor !

    There are SIX on a V8 ! OMG !



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