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My 1998 Nissan Altima failed my smog check with high NOx
My 1998 Nissan Altima failed my smog check with high NOx (max NOx: 443 @ 15mph mine: 1026 NOx). No check engine light but a code of P0325. No other code show on meter. When I check the EGR valve (pull… read more
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After having the whole exhaust system cleaned and examined by mechanics, I am still having a problem passing the smog test. EGR system is working, O2 sensors are working, but Nox reading is still in 5… read more
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I have a 96 nissan pathfinder v6 automatic 4x4. There are
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I hav ea 1993 Nissan truck, 4 cyclinder, 57000 miles on it. I think I have problem with the fuel injection system. Dues it have a choke on it? The truck idles high even after the engines is warm. It a… read more
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1993 Nissan: wiring harness..O2 sensor..the EGR..check engine light
Can anyone tell me if the 1993 Nissan's had a wiring harness that controls the EGR? My Nissan is failing on NOx at 15 and 25 mph at over 2000 ppm and the following things have been done: New Cat, Muff… read more
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NISSAN 240SX: o2 SENSOR WAS NOT MOVING SO..MY SCANNER..ON
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1994 2.4: bad hose..exhaust....small blast of air freed it up..
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94 Sentra: Solenoid..the intake manifold EGR inlets to each cylinder
I have a 94 Sentra w/270K runs good one owner which failed Nox Emissions readings 1916 with 1186 allowed. I took it to a shop and received a 1200 estimate to replace the EGR, BPT and Solenoid body and… read more
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95 SENTRA: LEAKS..THE EGR SOLENOID IS NOT SENDING VACUUM..DISCONNECT
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1991 pathfinder: smog..Cheked Vacuum supply to EGR valve..drops down
I have a 1991 pathfinder and it failed smog, gross polluter on nox readings, HC and CO are clean. Checked EGR valve, ok. Cheked Vacuum supply to EGR valve , vacuum is present when accelarating but dro… read more
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2000 Nissan Maxima: DOHC..I disconnect the Mass Air Flow sensor it
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My 97 Altima failed a SMOG test due to NO levels at 15mph.
My 97 Altima failed a SMOG test due to NO levels at 15mph. The vehicle passed all other portions of the tests, but ran very high of the avg. levels. I am thinking of replacing the oxgen sensor... Do y… read more
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1994 nissan: emissions..nox too high..shows engine codes 33
1994 nissan maxima..3.0 engine..failed emissions..nox too high..shows engine codes 33 and 21..please evaluate and suggest… read more
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used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

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9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

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Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

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Richard

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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