Question about Nissan Sentra

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I have a 2003 Nissan Sentra SE-R Spec V. o2 sensor location?!?1

I have a 2003 Nissan Sentra SE-R Spec V
My error codes show that there is a problem with o2 sensor. (sensor 2). I went to my mechanic and he couldnt find sensor 2.

Please advice of the location of o2 sensors

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  • Anonymous Feb 13, 2010

    How many sensors are there suppose to be 2 or 4?

  • Anonymous Feb 13, 2010

    How many sensors are there 2 or 4? and i need to know exact location

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  • Nissan Master
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Theres always one on the intake manifold working its way down to catalytic convertor is the oxygen sensor 1 heater circuit(pre cat conv) signal while terminal #25 is oxygen sensor 2 heater circuit (post cat conv)

Posted on Feb 12, 2010

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  • Master
  • 677 Answers

The O2 sender is usually in the exhaust pipe just after the exhaust manifold. It is screwed in like a spark plug.
If it is not there please let me know.

Posted on Feb 12, 2010

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Hey


Most times when you have a cut in power when the RPM's are high that's most likely a "SPARK" problem. However it can also be a "GAS " problem. Does check engine light come ON if it is or even if it NOT ON there can still be a Code stores in your computer. My first thing would be a BAD CRANK sensor/CAM sensor. This is my recommendations you should have this vehicle place on a code scanner/computer AUTO-ZONE does this check for free then get the codes if any is present and get back to me asap. I strongly thing it would be a crank sensor but if not there is a 20% chance its a FUEL PUMP can meet the demand when you hit the gas therefore then engine starves and dies. LEt me know how you made out. Good Luck and Thanks for using FIX YA

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I have the same car and I know there was a TSB for the ECM . I know the ECM issue has cause some cars to stall while driving

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