How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Jay Your Own Question

Jay
Jay, Nissan Technician
Category: Nissan
Satisfied Customers: 14269
Experience:  20+yrs experience with Nissan & Infiniti Trained & Certified.Currently still working for Dealer
Type Your Nissan Question Here...
Jay is online now
A new question is answered every 9 seconds

1998 nissan altima: canister..vent..control valve..continuity..sensors

Customer Question

My 1998 nissan altima keeps getting a ses code p1446(evap canister vent control valve closed). I checked to see if the valve is operating properly and it is. I changed every sensor and component in the evap system and checked for continuity in the plugs going to the sensors. I also cleaned the evap system with compressed air. Everything checks good, but I still keep getting the code (No gas over flow or out the back and no pump nozzle stopping too soon when I go to fill up). I'm stumped can you PLEASE help me out! Thanks
Submitted: 4 years ago.
Category: Nissan
Expert:  Nathan replied 4 years ago.
could you list each and every component you have replaced and or repaired.

I want to make sure something wasn't missed.
Customer: replied 4 years ago.
evap canister, evap pressure sensor, evap canister vent control valve, vacuum cut valve, vacuum cut bypass valve. I just changed the evap purge volume control valve today, but I havent test drove the car to see if the light comes back on
Expert:  Nathan replied 4 years ago.
Ok and did you insure that the line between the purge volume control valve and the canister was completely clear? Could you blow through it easily with your mouth?

Also did you replace all these components with new or used parts?

Double check the vacuum cut bypass cut valve and make sure it was installed correctly. I have seen alot of people install this valve upside down. The bracket that it clips into has a tab cut out of it in which the new bypass cut valve mates with to insure it is installed properly.

graphic
Customer: replied 4 years ago.
I replaced with used parts that I checked with a multimeter to make sure they were good. When I cleaned the evap system, I didnt find any clogged lines. Also the vacuum cut bypass cut valve is installed correctly.
Expert:  Nathan replied 4 years ago.
lets do this, you said you haven't driven the vehicle since the purge volume control valve was installed so go ahead and drive the vehicle for a couple of days and see if the code returns. I will leave this question open. When you confirm that there is or isn't a problem still let me know. We can then continue from there.
Customer: replied 4 years ago.
The light came on again. Does the ecu code p0325 (knock sensor) have anything to do with my problem?
Expert:  Nathan replied 4 years ago.

The p0325 code is completely unrelated to your problem. With everything you have already done there must be something you missed. I don't normally like to do this but I think it might be best if you have a dealership check it out for you to see what was missed.

 

I will OPT out so others can respond if they wish.

Expert:  Jay replied 4 years ago.
Hello and thank you for using JustAnswer.com

The code you have is for the Vent control valve. The most common thing for this is the vent control valve. I understand you said you have checked it. Did you apply voltage to it to get it to click? When it clicked did you see if the valve inside moved? The valve inside is what gets stuck or doesn't seal and causes the evap leak which throws the code. That and check the evap canister where the vent control valve bolts to it. I have seen the canister crack there.

If you have any more questions on this, please feel free to ask. Thanks Jay!
Customer: replied 4 years ago.
I think I found the proplem! My original charcoal canister is completely clogged (takes a couple days of driving to illuminate the service engine soon light). As for the other charcoal canister, I am able to blow very little air (from my mouth) through it (I covered the purge tube and blew through the gas tank tube on the charcoal canister and felt a little air coming out the vent control valve). This canister illuminates the check engine light within 10 min of driving. Also the can that is completely clogged is much more hevier than the other. How much air should be felt when blowing through the can as described above? Should it be free flowing or minimal effort?
Expert:  Jay replied 4 years ago.
Oh jezz, I never put my mouth to it. hehe. I am just telling you what I have seen most of the time.

I can tell you this. Remove the vent control valve completely. With a flash light and a small pick or screw driver, see if you can lift up the valve and make sure it moves very freely. Moisture normally rusts the valve part. So you can hear and feel it click, but the actual valve doesn't fully move or it's already stuck. When you remove it, it should be all the way down. If it's all the way up, don't try to free it up, it's just going to get stuck up there again.

With that valve we normally replace the canister also. Most cases the bolts that secure the vent control valve break in the canister.

If you have any more questions on this, please feel free to ask. Thanks Jay!

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was in trouble with an electrical issue with my brand new Nissan. I frantically went online trying to find help and luckily I found your site. I reached a NISSAN tech named RIP. He was absolutely tremendous and helped me work through the issue. What a pro! cjaz Lexington, KY
< Last | Next >
  • I was in trouble with an electrical issue with my brand new Nissan. I frantically went online trying to find help and luckily I found your site. I reached a NISSAN tech named RIP. He was absolutely tremendous and helped me work through the issue. What a pro! cjaz Lexington, KY
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • 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. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • 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. Charles Walnut 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!
    Sue Charleston, 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. Jim Castleberry, FL
 
 
 

Meet The Experts:

 
 
 
  • Tim Mohr

    ASE MASTER TECH

    Satisfied Customers:

    446
    30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
< Last | Next >
  • http://ww2.justanswer.com/uploads/tsmodie/2009-6-10_144056_tim.jpg Tim Mohr's Avatar

    Tim Mohr

    ASE MASTER TECH

    Satisfied Customers:

    446
    30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
  • http://ww2.justanswer.com/uploads/CA/caprio23/2011-12-13_155550_20111213105344.64x64.jpg Anthony's Avatar

    Anthony

    ASE Certified Technician

    Satisfied Customers:

    306
    ASE Master Automobile Technician with over 18 years exp. in this field.
  • http://ww2.justanswer.com/uploads/FO/fordguy4u/2011-12-17_222940_HPIM1257.64x64.JPG Ron's Avatar

    Ron

    ASE Certified Technician

    Satisfied Customers:

    171
    34 years of automotive Repair
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris(aka-Moose)'s Avatar

    Chris(aka-Moose)

    Nissan Technician

    Satisfied Customers:

    165
    16 years of experience
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    ASE Certified Technician

    Satisfied Customers:

    127
    ASE & Bosch master tech. 30 years experience.
  • http://ww2.justanswer.com/uploads/BA/baddad1/2013-8-30_131413_11848761610058140852271553042976n.64x64.jpg Mike V.'s Avatar

    Mike V.

    Nissan Technician

    Satisfied Customers:

    7443
    Nissan factory trained and Certified Subaru Technician.
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    92
    Nissan Tech ASE certified technician