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2000 nissan maxima, runs great, engine lite on, won't pass emissions

The codes say the o2 sensor and the knock sensor are showing up. I can't afford costly repairs and I may have to sell the car. Light has been on a long time now.Had it turned off by a mechanic but the light came back on. Any thoughts?

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  • Nissan Master
  • 383 Answers

Sorry, the only thing you can do is fix it right or pedal it off on someelse. The O2 sensor isn't that expensive. They make usnversal ones, like Bosch, as an example which will work with your car and is much cheaper. You can try an auto parts house. Often they will have an O2 sensor with the correct plug where you don't have to mess with splicing any wires. It's not difficult to change. There is a special tool which makes it easier , but you can do it with a combination wrench (open on one end and closed or round on the other end.) The knock sensor is a mother! it is located (if I'm not mistaken) below the lower plenum (or intake manifold) it's not really that hard to do but very time consuming if you are not a professional. Haynes, I think, makes a manual on this car which gives you blow by blow instructions on how to do nearly every mechanical repair on the car. Changing these parts may be a lot cheaper than going out and buying another used car which may develope the same problem soon after you buy it.
Good luck.Note the light will have to be cleared after the parts are installed..

Posted on Jun 29, 2014

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: Check Engine Light 1996 Nissan Maxima

The best way is to use a scan tool to clear the codes, that will turn off the light, also disconnecting the battery over night may work, but no completely sure about that, it varies from year to year.

Posted on Sep 23, 2008

  • 68 Answers

SOURCE: 2000 nissan maxima, pass Connecticut Emissions test

catalytic converter is the way to fix your problem because they do an emissions test and the code want go away even if you get the light off before you take it in they will no the computer has just been reset so which means all the sensors want have enough info to give the computer because of being reset sorry to break it to you.

Posted on Jul 31, 2009

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Nov 03, 2009 | 1997 Nissan Maxima

2 Answers

P0171B


It means that your engine is running lean - not getting enough fuel for the amount of air that the engine is receiving. Because your maxima is equipped with a V-6 engine, whatever the problem, it is affecting only bank #1. Bank #1 is always the side of the engine where cylinder #1 is located, or in your case, the left side of the engine as it is viewed while facing the crankshaft end of the engine.
(on a 4 cylinder engine, there is only one bank and it is always referred to as Bank #1)
There are several things that can cause a lean condition including vacuum leaks, a malfunctioning Evaporative Emissions system, a misfiring cylinder (due to bad plugs, bad injectors, or an intake or head gasket leak.), a malfunctioning Mass Airflow sensor (MAF) or Manifold Absolute Pressure sensor (MAP) or even a bad Oxygen sensor (O2s) (Nissan sometimes calls an O2s an "Air-Fuel Ratio Sensor") It is even possible for a leaking vacuum brake booster to cause a lean code.
If there are any other malfunction codes present, it may help to pinpiont the cause of the lean code. (Like a P0301 "cylinder#1 misfire detected", in which case, you would address the misfire code first.)
Certain problems, like a leaking brake booster or a bad MAF will usually set lean codes for BOTH banks.
If the P0171 is the ONLY code present, the most likely cause is a bad O2s, but I recommend some diagnostic testing to prove it before spending the mega-bucks that Nissan gets for their O2 sensors.

Oct 10, 2009 | 2000 Nissan Maxima

1 Answer

2000 nissan maxima, pass Connecticut Emissions test


catalytic converter is the way to fix your problem because they do an emissions test and the code want go away even if you get the light off before you take it in they will no the computer has just been reset so which means all the sensors want have enough info to give the computer because of being reset sorry to break it to you.

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Jun 14, 2009 | 1996 Nissan Maxima

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