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Nissan altima code p2a00

Failed smog test, scanner gave this code and still on...co levels too high on failed test

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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justuscc
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SOURCE: CHEVY SUBURBAN FAILED SMOG BECAUSE OF HIGH NOX VALUES.

nox is from running lean..... its realy high temps that cause this.......... replace the o2 sensors this should cure that any more help let me know

Posted on Oct 24, 2008

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txkjun
  • 409 Answers

SOURCE: Failed Smog Test - 4 codes for 2001 Isuzu Rodeo

Tune it up and replace the 02 sensor that keeps setting the codes bank 2 sensor 1. Have your oil and filter changed right before you go for a retest to. That will clear up 3 codes P0300, 0155 and 0154. You might have to replace the fuel sending unit to get rid of P0463 but if the gauge works OK I'd leave it alone.

Posted on Jan 12, 2009

  • 65 Answers

SOURCE: My 1991 4runner failed emissions test with high CO and HC levels.

Not sure, but did you replace the oxygen sensors. Is your catalytic converter still good?

Posted on Aug 21, 2009

  • 194 Answers

SOURCE: 1991 Honda Accord LX failed emission test on smog

not enough info. Typically, CO and HC together can be the result of poor fuel control or misfire, or worn components such as O2 sensor or catalytic converter, but without more data, repair recommendations are likely to waste money and not achieve success.

Posted on Sep 12, 2009

nvannoy
  • 234 Answers

SOURCE: 1992 dodge stealth failed smog test with high NOx

NOX is produced when cylinder temperatures exceed 2500 f.
Your vehicle has 2 ways to directly reduce NOX, EGR system, and catalytic converter, and also the cooling system indirectly.
Take a look at the EGR system, vacuum lines, pipes, and make sure the diaphragm moves. Disconnect the vacuum line, then push on the diaphragm and plug the hole (from vacuum line) when you release the diaphragm there should be vacuum. Also you may want to take it out and give the EGR passages and EGR valve a good cleaning, with some type of carbon cleaner like carb cleaner.

Posted on Mar 10, 2010

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1 Answer

2000 Nissan Altima XE need drive cycle to pass smog test after disconnecting battery


If you take your car to smog check station and they talk about drive cycle,that means you need to drive you car on the street at speed of 25 to 35 mph then take it to the freeway and accelerate to get the speed of the rest cars and drive you car at 55 to 65 mph then take it down to the street again and drive a little more the turn it off, this is what the mechanics call drive cycle after this the car if everything is right I mean if there is no any damaged sensor the onboard computer get all the info from the sensors and is ready to the test

Sep 02, 2016 | 2000 Nissan Altima

1 Answer

What does it mean when it says co


CO? That means Carbon Monoxide - it's a rather toxic and poisonous gas emitted from the exhaust system.

When they check emissions on cars CO is one of the gases they measure. If the level is too high .. your car fails the emissions test. I believe in the USA the emissions test is known as the 'smog test'?

If you have a problem with excess CO emissions on a car the cause is often an incorrect fuel/air mixture or a faulty sensor called the lambda/oxygen sensor in the exhaust system

May 12, 2016 | Cars & Trucks

1 Answer

What might cause codes p0325 , p0304 to turn my check engine light on during smog test on my1998 Nissan Altima 2.4L No kicking No noise except the drive belt which just started after smog test


This is common in the Nissan's could be the cam and crank sensor these go at around 70000 to 120000 should do both at once to be safe. that will fail an emissions test for sure. hope this helps

Mar 09, 2016 | 1998 Nissan Altima

2 Answers

My nissan altima 1999 did not pass the smog test due to "high emission", it also does not have the check engine light on or give any obd codes. What could be the problem?


Robert, High emissions usually mean the EGR valve and several hoses and other smog components are clogged up. There is no easy fix, you have to get the shop to check through the smog system on your car if you cannot do it yourself. Type of driving, short runs, high miles, burning oil etc all contribute to the engine giving a dirty reading. It may not be enough to light the lamp but it'll be dirty enough. Of cause, it may be the lamp is bust as well? Does it test light when you start up?

Nov 05, 2013 | 1999 Nissan Altima

2 Answers

1995 Honda Civc failed Emmisions test


Emission test by codes reader? or smog? Any codes?

May 22, 2017 | 1998 Honda Civic

1 Answer

1986 NISSAN 300ZX FAILED EMISSIONS HIGH CO


I would replace CATalitic converter, this car is old, plus a tuneup is 100% necessary , spark plugs wires, ditributor cap & rotor, plus both the air & fuel filters need replaced. change oil & filter. then you will pass emissions test. and your car will run like its suppose too. if you don't do all this , then buy a new car !

Feb 02, 2013 | 1986 Nissan 300ZX

1 Answer

I took my daughters 1995 Nissan Altima for its two year smog inspection and it failed three times due to nox failure at levels around 1400. Back in march of 2009 I took it to a reputable shop and they...


Check the ports if there is any carbon,I doubt it,
but you got to look
I would make sure you don't have overheating issues
That is the cause of NOX (High Combustion Temp)
Check fuel pressure
Use synthetic oil in engine
Check PCV Hoses etc

Feb 06, 2011 | 1995 Nissan Altima

2 Answers

1988 Ranger failed CA smog test (badly)


pull head off and grind the valves in,this should help reduce the levels ,also check the pistons and bores if ok or look it then rebuild and try it again

Jan 07, 2009 | 1988 Ford Ranger

1 Answer

Cylinder 4 misfire: lacks compression


It seems that you may have a dead clyinder. An engine compression test has to be preformed first to determine if this is in fact true. If you do have a weak or dead clyinder, it could be the cause of two failures. Braken or worn piston rings, or more commonly, burnt valve. Either one of these conditions will cause you to fail smog test.

Both of these jobs are also major repairs. I worked for Nissian/Datsun for many years rebuildng their engines.
Bill

Oct 15, 2008 | 1998 Nissan Altima

1 Answer

1994 altima failed emmision for co


Change the oil, this should lower it enough to get you through, also run the car on the freeway if possible to heat up the catalytic converter as much as possible, leave it running and wait for the test to be run, I was a smog tech for years and these are the tricks I used to get cars to pass that were as close to the limit as yours.

Oct 03, 2008 | 1994 Nissan Altima

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