How To Test and Replace EVAP Canister Vent Control Valve P0446

Evaporative Emission (EVAP) Canister Vent Control Valve - P0446 -testing and replacement. This specific vehicle is a '97 Nissan Maxima. Check with your vehicle's repair manual for testing parameters.
The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent. This solenoid responds to signals from the ECM. When the ECM sends an on signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is a necessary part of the diagnosis algorithms for other evaporative loss system components.
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P0446 - An improper voltage signal is entered in to the ECM through EVAP canister vent control valve. Or, EVAP canister vent control valve does not operate properly.
Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.
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[@Lholden17]

Hi, just need to tell you that I'm a woman and I fixed my 2001 Chevy Blazer PO446 by pulling out the 10A Engine 1 fuse (which was NOT burn't out), wiping the connection with my fingers, pushing it back into place and giving it a hard push in and my truck runs great now...a quick fix and didn't cost me a penny !

[@CarsNToys]

Awesome. Glad it worked out.

[@ldr4278]

Out of everyone out there you are the most articulate ! You are the best ! You can teach this stuff !

[@CarsNToys]

Thank you! Appreciate the feedback.

[@davidkane9220]

Thank you so much! This video probably saved me a considerable amount of time and money.

[@angelasmith9275]

video very well done - easy to follow along, easy to understand, good lighting, and you stay on point

[@CarsNToys]

Thank you!

[@ifucturmotha6692]

​@@CarsNToysis this a Cadillac?

[@davidvolz6282]

I was really impressed with the caliber of the video/audio. So many are full of shaking and quick motions that make them hard to watch or contain outside noises that have nothing to do with the video. So kudos in making an easy to watch video. I found the testing contained in this video extremely valuable. However, as mentioned by a previous commenter, the video stopped short of the actual replacement of the value. That may have been due to the use of gasket maker to fill a leak previously or the implication at the beginning of the video that the replacement only involved the removal of two bolts. But being a novice with car repairs I'm not sure which. That said, thanks again for making a great video.

[@CarsNToys]

Thank you. Appreciate the feedback. Yes, I didn't want to break the seal as this specific valve was working perfectly fine. Cheers.

[@johnathansmith3819]

Good lighting, and explanation. You forgot to mention Model and Year. Not all years have the same design and conformation to each model. Thank you for video.

[@Curbsidehustle87]

Yes sensei young grasshopper has been taught thanks broski

[@MiddleAgedBaldGuy]

Thank you! Very informative. I have a Kia Sedona that's throwing that code.

[@shaunlambertii79]

Great lighting, great information.

[@CarsNToys]

Thanks. Appreciate the feedback.

[@philllsxga.7737]

I have a p0446 on my Trans am. Thank you!

[@isabellevkd]

Thank you! Working on my Accent tomorrow, and this has been a great help.

[@CarsNToys]

Excellent!

[@ish8519]

Thanks for your instructions, thanks to them have I been able to rule out many thinks that could be the problem. On the hardness connected to the vent valve I only get around 1 volt or less. It seems i cannot establish contact the holes of the hardness might be too small? I see you can easily make contact with the multimeter. Thanks man

[@c-yabugginout7573]

Your video is very well done. Nice tone and good lighting. I need all the help I can get and your video is what will help me be closer than not!! I will subscribe to your channel : )

[@CarsNToys]

Thank you

[@MtnBadger]

It can also be tripped by a faulty gas cap. Sometimes a malfunctioning purge valve but, usually what you covered, good job.

[@ILuv2learn]

Thanks for the reminder. I just fixed my 2000 Mazda B3000 (only 60k miles) with a new gas cap. Years ago I fixed the problem on our Lexus with a gas cap, but forgot about it.

[@MtnBadger]

@@ILuv2learn You're welcome. 😀

[@LuisMoran76]

thank you for your video very educational

[@nikmamad]

Thank you

[@diversity2739]

thanks

[@mohammednasirumar9724]

Thanx It was very educative

[@leonidascid8933]

thanks bro. you r awesome I like how to explain the process keep going

[@garymiller2056]

I have never seen one so easy to access (canister)

[@froglobster]

HI a mandatory subscription right now-PO446 2008 F150, is there a constant same issue? The truck is babied low mileage never off road Thanks Eric

[@KAPtv]

TY sir.

[@bikinmike3274]

thank you.

[@CarsNToys]

Welcome.

[@olenaerhardt7725]

When you check that valve w/power source does polarity matter? Thank you for the good film.

[@toddr4532]

Nissan Sentra 2000 1.8 liter. Getting code 1448. "EVAP Canister Vent Control Valve (Open)" There are 3 EVAP system solenoids for this model. See image at 5:40 in your video (well done btw & ty) above the "ck" in the word "click". Eventually found this online as part #CVS99: vapor canister vent solenoid, also there is a vacuum switch canister purge control solenoid (p#:FDCC100 & under the hood) and the one you tested mounted to the canister (PV583). Tried 12V method outlined here on all 3: only CVS99 failed.

[@nilanthanilantha3224]

good

[@nelidamorales959]

hello this is for 1997 nissan pathfinder too thank you

[@CarsNToys]

Awesome!

[@panchitomontero9051]

Really cool video. Thanks for sharing. Will this apply to an "Evaporative Emission System Vent Control Circuit"? That's the description my code reader is giving me with code no. P0446. I'm not sure if I should just replace a part, though, I'm not sure which one it is. I have a Pathfinder 1997.

[@lemmy999]

Remember to have a fuse inline when connection your test 12V to the EVAP vent control valve. Mine failed and there was a short on the terminals. I hooked it up with a fairly large fuse and it instantly blew the fuse.

[@CarsNToys]

Good tip! Thank you.

[@RetroPCUser]

How big of a fuse do you recommend for this? I'm planning on testing mine sometime soon and buy a replacement since mine is stuck open (which can be a good thing, but bad at the same time). Good thing I can still fill my car up and if it was restricted air flow, my car would be sitting on the driveway again.

[@lemmy999]

@@RetroPCUser If I remember correctly a working unit doesn't use that much current. I think I used a 5A fuse but could have gone smaller.

[@stevenmcneill4666]

I have a 1996 Nissan Maxima and having this same issue. You mentioned that you may need to check a fuse. Is the fuse under the hood or the inside fuse panel, and which fuse exactly need to be check?

[@66crush9]

so if you hear the tapping does that always mean the solenoid is in fact sealing the vent?

[@leordo11]

I use a 9 volt battery to test the valve and check if air is going through it should be close the one I replaced was leaking the plunger was not closing all the way.

[@johntube2525]

Danny Ordonez, We tried a 9 volt battery to test a vent valve and we could hear a small click, but we could still blow air through it. Since it was a brand new vent valve we then tried hooking it up to the vehicles 12 volt battery, positive and negative, using aligator clips, and we heard a much louder clunk and we could not blow air through it. So I think you need at least 12 volts to test a vent valve.

[@SWTWHITEGSR]

You sealed it on the section where you added a sealant did you find the leak with a smoke machine?

[@catchmydrift411]

I've been having a nightmare trying too get egr ready for nissan frontier I've replaced many parts no luck, testing this part it is not functioning correctly, could this be the cause ? Your wisdom is appreciated 🙏

[@neilwilliams8608]

I have a 2002 Nissan Maxima 3.5 and I am not getting an error code of P0446 but, P0449. Why is this or, do they mean something different from each other? Also, would this error code cause the engine not to crank? Awesome video. Thanks a lot.

[@mohammednasirumar9724]

Hw I wish that test was carried out on a 98 Accord, cos I have same prob bt don't know hw 2 solve it. My fuel gauge drops overnight, bt as I drive the following morning it goes back to it position. What could b the solution. Thanks Nasir

[@anthonymcfarlane3014]

What would cause a has leak in this area when topping off your tank? I like to keep my tank full so every few days i top off the tank . And sometimes gas leaks by the rear drivers wheel. There's alot of snow on the ground right now so I can't really check too good. But there's no check lights on the dash and she runs great with good gas mileage .

[@DJNaturaultone]

can the canister be clogged if everything else is good?

[@ScottysVise]

2005 f250 super duty 5.4 liter. Getting 11.86v to the plug. Hooked up an isolated battery to the valve and got NO clicks. Should I order the canister vent solenoid? Throwing only the P0446 code. Oem solenoid part #reads F80E-9F945-AA. Thanks for your help!

[@cherokeethunder6000]

Hello CarsNToys, Great video although I've got a question... What do I do if I'm only getting 2 volts & dropping from the Vent valves' connector plug? (Unplugged from valve and tested with digital multi-meter like you show in this video).

[@AF1MIDS]

Good Afternoon! I have a 2003 Dodge Caravan and i would like to know how i can close the vent valve because i have no idea on how to do so, also i dont have no scanner with bi-directional controls or a hand vacuum pump either. Can you please help me?

[@13stonez]

Good morning, I have a 2001 Toyota Sienna, Can you advise where is the evap vent valve fuse located at please? I can't seems to find such label on the both cabin and engine bay fuseboxs. Thank you.

[@daviddowns7552]

i had code po446 and got lucky. i noticed and fixed a torn hose to evap solenoid tip and replaced it and erased code. it hasnt came back on yet+ and running better. so hopefully im good.

[@meTimetraveler]

i used an old computer power supply for the 12 volts. jumper the green and black wire on the 24/26 connector. hearing the solenoid click DOES NOT verify that the valve works. I have one now that the plunger is rusted shut which happens a lot and the solenoid clicks. a service manual will tell how to test on the car. or remove, with 12v applied you should be able to blow air through from one port to the other. no 12volts ports are blocked. mine is blocked constantly.

[@greenspiraldragon]

You could also have someone turn the switch to on position while your back there and listen for the thunk then you won't need a battery pack.

[@skylerwickline4904]

greenspiraldragon the switch are you talking about the ignition ??

[@jamieclemons1526]

yes

[@phyllisjohnson4603]

greenspiraldragon

[@garymiller2056]

I'm not sure that would work, greenspir, You would get voltage there but the computer controls ground. It is normally open, but when is it closed? It is closed when the purge is on. That is when it would be grounded?? Too many questions.

[@jkade8857]

Will the canister being bad itself cause that code. Mine is shot and sucking charcoal into the evap lines...

[@oneguysopinionyup7252]

Do I even need this thing ? If I cut the line under the hood and never fixed it whats the big deal

[@EC_-mb1tn]

Hello, great video. After changing the valve, how long should I wait until the check engine light shuts off??

[@CarsNToys]

+Cesar Cisneros It depends on how much you drive the car. Figure a solid day or two.

[@garymiller2056]

If you have fixed the problem, the light may go out after the first or second purge cycle.

[@djpalos81]

this is the code that I have on my 2001 Pontiac Grand Am GT P0446. would I be able to do the same thing that you did on this car?

[@CarsNToys]

It will look a little different but it performs the same job.

[@clayebersole8544]

I replaced my vapor/charcoal canister and purge solenoid that attaches to the canister and this morning my car reeks of gas when I reattach my old Vapor canister to my new Vapor solenoid I am not smelling any gas any idea why I'm smelling gas with the new canister

[@francesgrajales7239]

this code po441 i have on my 1998 toyota cor 1.8 now this come from cheap gas an there anything to clean it

[@arcorob]

Hope you can help. I have a 2002 GMC Sierra that threw the P0446. Replaced the solenoid and the hose. Cleared the code and after she cycles through the self tests (drive , cold start, etc) she threw the same code. Check the car fuses, fine. Can the charcoal canister cause that or did I get a defective evap valve? I mean this thing is driving me nuts....any guidance would help

[@CarsNToys]

I'd start by making sure power is getting to the harness connector. If so, I'd check the valve next and go from there. evap codes are never fun.

[@emekaezenekwe3557]

How can check emission solonpid or valve in Toyota on Grand

[@fp1180]

Where can I find mine on my 2008 xc90 Volvo?

[@johnsmith-sk1ep]

I don't know about the maxima, but on my 97 nissan hardbody p0446 can also be caused by no power to the vent solenoid, e.g. not having the harness connected correctly, or circuit break, or fried ecu. If you have a bad canister, it may throw a p1447 because the canister leaks the charcoal into the line, and somewhere along the path towards and after the purge valve, it can get clogged up.

[@johnsmith-sk1ep]

In case anybody reads this, my canister turned out to be bad. I actually don't know anything about these canisters but I assume there is some membrane inside that keeps the carbon secured and since mine was leaking carbon pellets, I assume it was bad. Instead of taking it apart and/or refilling the carbon or shelling out $200 for a new canister, I took a nylon bag from a used tea bag (no joke), put it over the end of the output vent and screwed back the screw clamp on the hose and canister port, reset the computer codes and haven't had a problem since. What ever screen you use, just make sure it doesn't restrict the air flow but it's fine enough to keep the carbon pellets in the canister.

[@AshleyN654420091]

@@johnsmith-sk1ep wish I had thought I've that.

[@metalmaniac375]

Don't you need to blow air thru the valve at the same time you power it up to see if it is in fact working mechanically as well... I am fixing to test mine, thanks for the great vids!

[@CarsNToys]

Metal Maniac Yea man you can do that as an extra step and verify air is indeed getting through

[@garymiller2056]

I think when it is "powered up" is when air does NOT go through. It is normally open. When you are driving and gas is being used up , the vent is open to equalize the pressure. when you are parked it is also open . When pressure rises in the tank , the valve allows vapors to enter the canister It closes when the purge valve opens to remove vapors from the canister some time after the engine is started. That is when a vacuum develops which the pressure sensor reads. If it does not hold vacuum, that is when the computer throws a leak code. Long be I hope this helps.

[@Garconis]

"Replace EVAP Canister Vent Control Valve" ... never happened...

[@vladj2428]

yea that's true but he did show you how to find it what it looks like and what needs to be done to remove it so if you a replacement part you could just do it in reverse order..

[@allenkipps8179]

did you have to plug any lines after disconnect the canister or is the canister the same as the filter where it would require the switch to be on.

[@CarsNToys]

+Allen Kipps Are you referring to the charcoal filter? There's a charcoal filter inside the canister.

[@marks7352]

You never actually said if it has power, does it open or close the valve, you just say it works. So does power close the valve or open it?

[@infinitig3549]

Symptoms please?

[@papoportillo1019]

Will codes P0446 & P0450 on the same exact car cause it to want too shut off at times at idle or even at lights or stop signs ???? I need to stop it from doing this in traffic !!

[@castro8191]

Papo Portillo its your tempture sensor

[@MANNYVLOGS1987]

Hello. I noticed this was a Nissan Maxima. That's great. Because I just recently had my EVAP control valve vent replaced. I need to pass emissions by next weekend and my cars keeps getting rejected. I've driven the car 300 miles since I replaced it. But still no luck. It seems that I have 6 ready and 2 incomplete (not ready). Those two happen to be the Catalyst & EVAP. I'm under the understanding that I have to perform certain drive cycles. Great video by the way. I subscribed! But anything you may suggest? It's for a 97 Maxima GXE.

[@CarsNToys]

alpacino262000 Is the check engine light on? If so, what are the code(s)? The EVAP system has many components. I have a playlist addressing quite a few number of them - kzbin.info/aero/PLl6xt4Pyay3AWpPY3TMsUCczro3aSkpvD - but having a trouble code will pinpoint the problem quite quickly.

[@MANNYVLOGS1987]

CarsNToys the check engine light is off. and actually, you know what. I took it to emissions on Monday morning and it passed. Yet, the Catalyst and EVAP systems still showed as "not ready". weird. But I hear that those two are the hardest to get to set.

[@CarsNToys]

Nice man. Yeah, the EPA allows up to two 'not-ready' monitors for 1996-2000 vehicles.

[@MANNYVLOGS1987]

CarsNToys oh really? I was not aware of that. I'm going to keep that in mind for sure. thanks a lot man.

[@mariajimenez1665]

[@richardniiarmaharmah428]

Toyota Highlander 2015 obd2 code p043E

[@RaymonSernas]

Mi Sentra 2001 le falta la manguera i adónde va conectada la manguera quisiera saber cómo se llaman esas piezas

[@aorforever2334]

I have a 2002 Alero with P0446 code. Would the canister vent control valve be most suspect and would the testing be similar? Thanks

[@garymiller2056]

Yes, they all do the same thing, AOR.

[@DavidHernandez-ue4fz]

If valve is not good could you clean it?

[@Moemiasteph2012]

If the connector is only putting out 11.6v is that bad or is that common?

[@CarsNToys]

Moemiasteph2012 That's fine.

[@FamilyChannelfun32]

Was this under the car or in hood. Whole point is to show us location

[@josephcorrea3998]

i replaced that part and then cycled car on and off code went off . , then let car sit for about ten mins and came bak to car and same light and code were on afyer was cleard can anyone help me

[@oscarr3650]

I replaced myne and i continue to get same code and tighten gas cap loght but ive replaced vent solenoid and hoses. Any advise? 2007 chevy silverado classic

[@tgriffin6938]

This may help you. I used this video to fix the code on my Chevy. kzbin.info/www/bejne/aofEpIaJjqeUopY

[@dearnewoikkin8389]

My 2000 Nissan Altima gxe is giving off codes p1441, p1448 and p0455. Could this part causing all 3 of those codes to go off?

[@12248eduardo]

Did you figure it out? I have the p1440, and p441

[@scanman3915]

Sir--I have a P0446 code, and am following your work.. Unfortunately, I am working on my 03 Sonoma, which has to have the spare tire brought out just to get near test A... I took a quick look at the wires--they look fine, but i don't like the way they bent the wire 180 degrees to plug in.. I pray the sensor is good..

[@jasonnasiry]

Hi sir i have code P0456 smoked it nothing found, changed gas cap like 4 times with getting factory oem one and after another code p0401 popped up so i changed egr valve was told and no engine light for 2 months but now code P0456 again any suggestions was told to replace evap canister vent valve or purge valve...Its for a mitsubishi galant 2002

[@BrianaGettings]

I've got a 2003 Chevy Impala LS 3800 series, got your basic PO448 Evap Leak. Replaced the gas cap, reset entire system and light returned. Resently replaced the fuel filter which was pitch black. How to I find the EVAP Canster ?

[@CarsNToys]

Try google images. The canisters are often found near the fuel tank.

[@mylittlescienceproject]

My Scion xb is having this issue

[@meanpaintandbody]

1st thanks for ur videos they help a lot... So i have a 09 versa 1.8 and i have a p0442 and p0448 a leak and a bad solenoid or short but i have tested the solenoid and it work i have tested the wires i have 4 volts with the key in on and 13 with the motor running my 1st question is it normal? 2nd u think maybe a leak around the solenoid makes the computer think its open and will cause a p0448 from a p0442?

[@jorgechikas4581]

Hello I have replace the vent control valve and still getting the same error where is the 15 amp fuse you mention on this Video??

[@CarsNToys]

Jorge Chikas What kind of vehicle?

[@mamin-br9gs]

If you blow from one port, if Air come out from other side means EVAP Canister Vent Control valve bad ? (assuming 12V is not applied). I took mine out and It does not click when I applied 12V, also I can blow air and air comes out from other side.

[@RetroPCUser]

With it open (12V turned off with the car off), it'll allow you to fill up your car. If it doesn't close (don't hear a click with the car running), it means the relay inside the vent control is bad. The part itself isn't pricey, however, on some cars, it's inside the tank area. On my Oldsmobile Intrigue, it's mounted on the side and can get removed without issues. Remember: place a fuse in the positive (red) wire to check for a short circuit as well.

[@fireantseason5629]

to all with a 2007 hyundai accent or similar, to release the valve from the wiring harness, there's a little metal wire you push in to release it. tried pulling my hardest and it wouldn't come out until i realized that, haha

[@xxlaugherteexx]

Can this p0446 process be applied to a 2004 chevy s10 crew cab 4.3? Didn't see what vehicle this video was for.

[@CarsNToys]

Erik Lafferty This was done on a '97 Maxima, however, if you apply power to the vent control valve on your truck you should hear the valve move back and forth.

[@xxlaugherteexx]

Ok, thanks

[@Pradelo]

Hello Guys I have Nissan Xterra 2004 after 3 years old after buying it, i have this error code P1490 (Evap vent control valve/bypass valve circuit) after testing the electrical connector on the VACUUM CUT VALVE BYPASS VALVE i got 11.9v i want to know if it's normal?

[@chilimartini2076]

Where is the fuse location for this solenoid's circuit on Corolla 1999?

[@CarsNToys]

Sorry I don't have the repair manual for your vehicle. Try searching via google images.

[@katefowler7152]

I tested the valve with 12V battery and it opens fine. I checked the terminal have 3V on one side and none on the other. Where is the fuse located (I have a 96 Nissan Hardbody)? Also I have read that there is power to both sides of the terminal is that true? I followed the wire that should have 12V along the body, under the seat, through the firewall, and it appears to attach to the "EVAP canister purge control volume control valve", which I tested watching your video and everything appeared to be in order. Any ideas?

[@Seeker85420]

The plastic-bodied electrical part needs a ground, so I assume the other wire is for that, no power should be on it, unless you have one multimeter lead hooked to battery positive, then the "hot" side will have no power. Not on both

[@alialrehal6776]

hey .. I have very high fuel vapor pressure in the fuel tank is that the EVAP canister DON'T WORK ?OR WHAT IS THE PROBLEM

[@garymiller2056]

Either the vent valve or purge valve is plugged or sticking shut ALI

[@yippyli]

Hey, I was checking voltage from harness and I got 12V last week and today I checked again and im getting 3V and falling down slowly. Why is that? Could it be not running for a week? Other thing I tested Vent Solenoid and its working. But I have rust outside of it just like your. Should I replace it?

[@CarsNToys]

+yippyli The voltage reading should be battery voltage. Were you able to start your car?

[@yippyli]

My battery is reading 12V. My car has hard start but able to start up after 3 seconds. Could it be bad ground from vent solenoid? If so, do you know where the location ground for vent solenoid?

[@garymiller2056]

I think the vent solenoid grounds through the ECU. But i"m not sure.

[@SLiveForTheMoment]

Have issues with p0448

[@migueltejada619]

My car (2004 Nissan Sentra) is throwing a code of p1273 , because of a air to fuel ratio issue. We've done about everything , so I'm wondering if this could potentially resolve the issue?

[@CarsNToys]

I'm afraid not. What specifically have you done?

[@migueltejada619]

It's been an issue for years now. The o2 sensor was replaced. A muffler was replaced. There was even some wiring that was redone at a shop, but this code just comes back to haunt me. When I pump gas it spews back out of the filler, so I was wondering if they were potentially related.

[@CHANNELCHECKER381]

so I have the P0446 code. I just replaced the EVAP solenoid and purge valve. I've check the plug and have 13 volts coming from truck. I ran power to the solenoid and its opening and closing just fine. not sure what else to check.

[@dustincmills]

Hoses?

[@scottbrantner2138]

Dustin Mills I actually think I figured it out. I believe one of my hoses are kinked. Right now it's 12° outside and snowing so I'm going to wait for a warmer day and see if that's what it is. I crawled up real quick before the snow started for another reason and it looked like one hose was bent to much and has a kink.

[@jeffkovene4420]

What kind of car are you working on???

[@tjcterrillchristian1]

Im only getting 2volts at the connector... im lost now lol

[@jorgechikas4581]

It's a 2002 Nissan Pathfinder se

[@valdovazquez6636]

Changed pump...canister solenoid... And when i open my gas cap it sucks in allot of air... Like if its not venting

[@papoportillo1019]

Symptoms of a failing or faulty unit ?? Whenever I put gas the gas pedal keeps clicking off & it takes forever to fill ..is this causing that

[@garymiller2056]

It could be, Papo.

[@cheyannerichardson7519]

Same concept for a 01 Pontiac Grand Prix?

[@hedgarhinojos5539]

I have a small leak on my evap Nissan sentra can you help me?

[@CarsNToys]

That will take some time to track down without a smoke machine. Nevertheless, feel free to send us an email with your year Sentra to [e-mail]

[@saralogan4668]

If the canister or any part is indeed bad, would it shut the vehicle down while driving?

[@CarsNToys]

Statistically, it's a pretty low possibility. Stalling tends to be a problem with the fuel/ignition system. Even a bad connection at the battery.

[@jerryadams3246]

What type of car were you working on?

[@CarsNToys]

'97 Maxima

[@agueros1983]

i have a 2004 nissan maxima. its giving me code p0444. I've replaced gas cap, I've changed both evap canisters in the front and the one underneath the vehicle by the gas tank and I'm still showing the check engine light. can someone give me some advice

[@CarsNToys]

Salvador Aguero P0444 deals with the EVAP canister purge volume control solenoid valve. It's easy to check the valve. I have a video on a similar valve for older Maximas. Your solenoid valve is located in the same area as shown in the video: kzbin.info/www/bejne/bZ_MXqCgp5arm8k

[@CarsNToys]

Salvador Aguero If you have trouble finding the valve try google images

[@chippsterstephens6800]

With the evap system a valve can open and close, yet leak just enough to throw a code. Needed to vacuumed test that valve as well. And man, buy some bolts dude.

[@LuisSanchez-ed6br]

hey guys i have a 93 corolla and for some reason if am driving down the road the car star running like crap i have to pull over open my gas cap let air out and the start running fine

[@garymiller2056]

I believe you are letting air in, Luis. Likely to be a vent valve not opening. WHY??

[@jessetate6244]

If you have the key forward and 12v at the connector shouldn't the canister click/open just by plugging it in? My has voltage and does not click(even though it's brand new) I don't have anything to run 12v to the back of my truck.

[@CarsNToys]

Jesse Tate Yeah man that works, too.

[@jessetate6244]

CarsNToys Damn, so I guess my brand new $130 ac-delco vent canister doesn't work.

[@CarsNToys]

Jesse Tate Not necessarily. I'd first verify if power is getting to the canister when the key is turned to the on position. (In other words, check if 12v of power is getting to the harness connector.) If so, then you can test the canister.

[@jessetate6244]

I do have/did check for 12 volts at the harness/connector. I'm going to remove it and try to jump it without the harness anyway. So frustrating. Then it's off to diagnosing either the carbon canister or the FTP sensor. Thanks for the help.

[@CarsNToys]

Good luck!