Question about 1995 Nissan Maxima

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Was told need to replace oxygen sensor (code PO150,PO400,and PO32

Where is the oxygen sensor and how do I replace it ?

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  • Rachel Maher Jul 22, 2009

    they didnt say but the guy mentioned 2 other sensors besides the oxygen sensor. The "knock sensor" and " egr temprature sensor"

  • Mike Vincent
    Mike Vincent May 11, 2010

    did they tell which sensor it is? there are more then one.

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There are two sensors or more if it's a v 6 or v8 you have a post catalytic converter 02 sensor which is on the exhaust manifold and you have another after the catalytic converter they will be on the exhaust system in case your not sure what the exhaust system looks like, the 02 sensor looks like a spark plug it will have a quick disconnect that you have to unhook before you unscrew the sensor, 02 sensors will fail in three ways the heater burns out or the sensor gets lazy and does not cycle fast enough for the computer or gets fowled out by carbon and does not read at all, most of the time it's the sensor before the catalytic converter or on the exhaust manifold you will need to buy a special 02 sensor socket to remove it. It has a slot for the wires in it and will allow the socket to let the wires hang to one side the socket costa about $20.00 at any parts store if you have a schucks or autozone you can go there and ask them to test your car and it's free they can pull the code and tell you which one it is and point it out to you and you can buy the sensor from them once it is replaced the light will go off by itself, a heated 02 sensor costs on average $40.00 may be more or less not including sales tax.

Posted on May 28, 2009

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