2023 here, gonna have to do this for my wifes car later today, just got the code this morning so glad this 13 year old video is here to help!
@crisquintanilla3373
4 жыл бұрын
Good video Jon, resolved the issue of my 96 RAV4. The VSV on the car tested 0 resistance, ordered in Amazon, installed, done. No more engine check code P0401. Ty. Daghang Salamat. Nj.
@7smr
10 жыл бұрын
I have a 1995 Toyota Camry with the same engine design. I cleaned the egr vacuum modulator filter and that cured the problem for me.
@jonny7570
10 жыл бұрын
I tried that on mine with no luck, but definitely worth a try. Thanks for your comment.
@mherrera60
11 жыл бұрын
Excellent video. It is so great that people like you upload these kind of videos to help people like me save some money. Thanks a lot!
@icarus550
10 жыл бұрын
Thanks for the video. I wish all how-to videos were this thorough. Nice job on the annotations too.
@jonstuff
10 жыл бұрын
Thank you sir
@1chicagojoe61
12 жыл бұрын
You should be a mechanical Answer Man your videos and information are better than any TV program I've ever seen.M.
@yosh7829
4 жыл бұрын
i can very much appreciate the help im dealing w the same problems lol thanks for the parts list!
@jonstuff
11 жыл бұрын
Glad my video helped you. Yeah they also used this engine in Camrys as well. Good point, it is a really dumb place to put the VSV. I think Toyota didn't want us messing with it LOL!
@ramilapacible9826
12 жыл бұрын
thank you it's really good help for me and i fix my rav4..now i can drive my car w/ engin light on..it's really awesome..
@misoucat
12 жыл бұрын
I mounted a replacement VSV on the firewall to an unused boss. It is also subjected to less vibration, dirt, and corrosion there. I won't have to go under the car if I need to replace it again. In retrospect, there was no need to remove the old one. Just disconnect the electrical and vacuum lines and move them to the one on the firewall. I suspect that it what most flat-rate and dealer mechanics would do. Maybe that is why Toyota put an unused boss just above the original location!
@hardtrance9
12 жыл бұрын
Awesome video! I was searching 1 year ago for something like this! I have a RAV4 1996, standard AWD and purchased the vehicle as used. It was ok for a while, then check light came on. But after a while there was a problem. Fuel consumption used to be 290 miles for a full tank and then it was only 100 for a full tank. I replaced the Oxygen sensor and that helped! But then (today). still the check light on and for a full tank I get 200 miles. Do you have a list with part numbers your replaced?
@yashmaval
11 жыл бұрын
I have a Camry, but found your video on EGR to be more informative than the Camry videos and used it as my guide. Thanks. Check engine light gone... For me it was only the VSV. I just keep wondering who designed the VSV to be is such an awkward, inaccessible place? Why didn't they just move it up on the firewall so it could be accessed from the top???? Were they just trying to harass us?
@zacinnc78
5 жыл бұрын
Im dealing with a camry too ,how did u do it i couldnt even see the bolt from underneath much less undo the hoses and harness
@jonstuff
12 жыл бұрын
Thanks, KZitem is were it's at to get the real help and answers.
@Sed1999Rav4
12 жыл бұрын
Have you had any drivability issues when you had this code P401, or just it did not pass the smog test? Now, do you have any issues with the "DORMAN" part? Thanks a lot Sed1999Rav4.
@mj-7444
4 жыл бұрын
That’s an Egr Solenoid my brother the VSV is the 3-way on top the intake manifold.
@jonstuff
12 жыл бұрын
@Sed1999Rav4 No drivability Issues, just high emissions for the smog test. The Dorman VSV part is working fine, it's been in more than a year now. Although I have installed a Dorman transmission sensor in recent days that was bad out of the box, so disappointing!
@jonstuff
12 жыл бұрын
@Sed1999Rav4 It's hard to diagnose the problem from my computer, I could only give a semi-educated guess. A vacuum switching valve (VSV) is a solenoid valve that controls the vacuum to the EGR valve either off or on. When the engine is cold the VSV is not energized stopping the vacuum from going to the EGR valve. When the engine warms up the VSV is energized allowing vacuum to flow to the EGR valve in which opens the EGR valve. There should be a diagram sticker under the hood.
@toml7056
11 жыл бұрын
Very thorough video, thanks for the info.
@jonstuff
12 жыл бұрын
@mV33rs Check that your meter is in the right ohm range. If it's still that high it's probably bad. Probably the best way to check it is to apply 12vdc to the terminals with some wire from the car's battery or a nine 9v battery will probably work to, and if it clicks it's good, no click it's bad.
@jonstuff
11 жыл бұрын
Your welcome. I made this video to help people because I had a hard time with this problem.
@indianatone218
5 жыл бұрын
what were the symptoms to begin with ? mines over revving at 2thou till its been down the road a while acting abit like an automatic choke . and fuel consumption seems high .thanks for vid .
@jacintogonzalez7146
2 жыл бұрын
I changed both vsv valves up and down on my 2000 rav 4. And I'm still getting the code p0401?? What should I do next???
@jonstuff
13 жыл бұрын
@FreakShow2008a Yes, It's been off for a year now. And good luck to you dude.
@Sed1999Rav4
12 жыл бұрын
@joe1951 Thank you so much for taking time to answer my questions I have 1999 RAV4 with loss of power when the RPMs are between 1700-2500, somebody on the net says it is one of the VSV failing mode without a light I do not have a light (No code), but I may have to replace my VSV, I found a 'Dorman' at RockAuto at $29, I am afraid to get this brand and be dispointed. Your thoughts are really appreciated. Again thank you so much. Sed1999Rav4.
@TheIVJackal
10 жыл бұрын
*SAVE TIME READ THIS*: On some cars, like mine, it's nearly impossible to take the bolt off. I've sprayed it, tapped it, and still cant break the bolt loose... If you determine the VSV is at fault by checking with multimeter, or if you just want to replace it, there is a free bolt you can mount it to on the firewall. Just leave the old VSV down there and bring up the vacuum lines to the new mounting spot. Hi Jon I had a question, where did you get the reading for what the VSV resistance is supposed to be? I was on Rav4World and two members said theirs were over 250ohms which was out of spec but they didn't say what normal was. Then you said 33-39ohms is normal. Just wondering where you found that info, been looking myself but can't find. I tested the VSV on my wife's car and got 47ohms so I was thinking it was okay. Thanks.
@jonstuff
10 жыл бұрын
TheIVJackal Hi, I don't really remember, some forum website. I would say you're reading is fine too. You just don't want a really high reading or OL. Thanks for posting the tip!
@blaneblue1739
4 жыл бұрын
Why not just run new vacuum lines too instead of fishing old vacuum lines out?
@jonstuff
13 жыл бұрын
@dennisunay It's a pain, there's two small nuts on top that holds it on to the studs of the engine and a big nut at the bottom from the exhaust. I think I used a small crescent wrench on that one. What makes it so hard there's not a lot of room between the engine and firewall. So be sure it's bad before removing it. Test it with the engine on and apply vacuum to the EGR valve vac port (I used a vac line from the throttle body to make it easy) and if the engine dies or almost dies it's good.
@enginedave
2 жыл бұрын
So many times I've heard that people don't both to remove the old one. They just plug the new one in and mount it elsewhere!
@JahanZeb1976
10 жыл бұрын
Great video and great fix. You have a very nice knowledge. Keep up good work.
@jonstuff
10 жыл бұрын
Thank you sir
@indianatone218
5 жыл бұрын
hi there what was the symptoms that drew you to the vacume switching valve ?. i have high reving from start takes a while to die down to 1,000 rpm then i have poor fuel consumption .do you think that it is the switching valve please . thanks for showing what youve already done .Ant from Wales UK .
@platinummind1697
4 жыл бұрын
I have the same problem with my Rav4.
@indianatone218
4 жыл бұрын
@@platinummind1697 if you find the problem let me know please and like wise
@jonstuff
13 жыл бұрын
@DonMecanico Hey thank you, this seems to be a common problem for the rav. I'm just glad to see that this video can help someone.
@jonstuff
12 жыл бұрын
@mV33rs Ok good, well I thought the 9v battery might work, good thing you tried the car battery.
@mezgebuabebe2503
11 жыл бұрын
Thanks for sharing it.
@qoulder
Жыл бұрын
Can this code cause a lean code? And 02 sensor codes? After I got this code I cleared it and got P0171 P1130 P1133
@fredost1504
4 жыл бұрын
Im not clear what fixed the problem, the VSV or the modulator?
@JSWMobileMedia
9 жыл бұрын
Question. On the vacuum modulator, how did you remove the cap to inspect/clean the filter? Twist and pull? Pull? I don't want to break it trying to remove it. Thanks!
@jonstuff
9 жыл бұрын
+Scott Stick If memory serves, I believe the cap just pops/pulls off. I used carb cleaner to clean the filter.
@jonstuff
11 жыл бұрын
Did you erase the code with a scanner? and what car is this for?
@barrystainer1323
5 жыл бұрын
Can you tell me what the symptoms were other than light coming on? I have had that code occasionally, but then goes away ???
@jonstuff
5 жыл бұрын
Little poorer gas mileage I think. Didn't really affect it too much. We had to get to pass a smog test.
@jonstuff
12 жыл бұрын
@Sed1999Rav4 I doubt it's the injectors, I would put that at the bottom of the list. I would look into the air/ignition system, cleaning the throttle body with throttle body/carb cleaner, cleaning mass air flow sensor with special mass air flow sensor cleaner, rotor/rotor cap, spark plugs (use the oem denso standard ones), etc. Again I'm not a expert here. Thanks for watching
@jonstuff
12 жыл бұрын
@Sed1999Rav4 Was this quote you got a problem from a Toyota? Does your engine hesitate when you rev between 1700-2500rpm's in park? Sure it's possible, basically some kind of vacuum leak causing a lean condition. However I find it unlikely without a CEL light that comes on. Toyota's have picky emission controls, even your quote has a CEL that lights up.
@jonstuff
12 жыл бұрын
@Sed1999Rav4 Continued... With that being said I would recommend looking for vacuum leaks/kinked lines (I posted a link on how to find vacuum leaks in this videos description). You might want to try spraying the VSV's filter thing with some carb cleaner and see if anything happens. It can still be a fuel problem. I still find it unlikely that it's the VSV without a CEL light tho, but if want to try replacing the VSV it's inexpensive like you said. Let me know the outcome. Jon
@jonstuff
13 жыл бұрын
@Flatulating No, mine is 2wd. I would imagined that the 4wd would make it interesting.
@FreakShow2008a
13 жыл бұрын
Good video... Did the EGR modulator replacement keep the P0401 off or did it return?
@zardozqq
9 жыл бұрын
You need a 12mm and 10mm wrench and sockets and a 6 inch extension on the sockets. Also very important buy all new vacuum hose lines about 4 feet on the small and 2 feet on the large (6 bucks )then cut them to size. when I looked at my vacuum lines they were as brittle as dry macaroni and one had a small crack in it . I cut it and it cracked again so you should just put in new ones, The bolts holding the egr to the air pipe is difficult to get to. What I did was label and take off all the vacuum lines. Then take off the egr modulator then unbolt the bracket holding the egr modulator on, then use the 6 inch extension and 10mm socket to unbolt both of the bolts from the drivers side (ya gotta feel it you wont be able to see it )
@jonstuff
9 жыл бұрын
zed zardoz Good tips! Thank you
@jamesbrower7158
9 жыл бұрын
Jon M. I am stupide but can you tell me how I take off and where the shroud is on the rav 4. thank you
@jonstuff
9 жыл бұрын
James Brower Your not stupid man. The shroud is the plastic cover under the engine (AKA the splash shield) I think it is two pieces and has a lot off 10mm bolts holding it on. You'll need a ratchet and a 10mm socket for that.
@jamesbrower7158
9 жыл бұрын
Jon M. Thank you so much I will try this tomorrow thanks for the help.. I am trying to change the Vacuum Switching Valve on a 1997 rav 4 allwheel drive.. I will let you now tomorrow if I can get them off.. I tried to get it off from the passenger side. could not get it.. but tanks
@Flatulating
13 жыл бұрын
Is your RAV four wheel drive? I read that getting at the VSV valve is difficult on the 4 wheel drive version. I've got a 1998 RAV4 with the PO401 code.
@alanrebora
8 ай бұрын
Hola buenas tardes tengo un problema con mi toyota rav4 modelo 97 no me anda a nafta ,prende y se apaga , me tira el código 1421, si me pueden dar una mano muchas gracias
@jonstuff
11 жыл бұрын
It might be clogged where the EGR bolts to the engine. And is P0401 the only code you have? Not sure what a VLC is? I'm not a mechanic tho, I'll try to post another video this weekend.
@lotharsor
9 жыл бұрын
i have the same code,this why my muffler is black and stinky? and sometimes i have a rattle noise under my 1999 toyo rav4 i already check everything under my car and i can't find anything.
@Sed1999Rav4
12 жыл бұрын
@joe1951 I took the quote from a forum in RAV4WORLD the post was describing the same symptoms as what I am having with my RAV4. I thought I’ll give it a try since the part is not that expensive and most people have replaced it To respond to your question about the hesitation, I haven’t had the hesitation since I replaced the A/F sensor but the RAV4 struggle before going from third to fourth gear and sometimes it does not go at all! Any idea, I really appreciate.
@brendanlivi
11 жыл бұрын
Thanks man it really help me a lot tankyou so much
@jonstuff
12 жыл бұрын
I hope you mean with the check engine light off?
@meteoroid-1574
5 жыл бұрын
Where is the location of odb2 port on 1998 rav4
@jonstuff
5 жыл бұрын
Right below the dash, driver's side towards the right I believe.
@nochan99
10 жыл бұрын
Thanks for the video! I have one question. Do you happen to know where the OBD2 port is located on this car? TIA
@jonstuff
10 жыл бұрын
Thank you, It's under the dash on the drivers side, on the right side I think.
@nochan99
10 жыл бұрын
Thanks
@Sed1999Rav4
12 жыл бұрын
Continued ... This failure mode is where the EGR VSV is leaking, so that air is getting to the vacuum pipes and to the throttle body. If it leaks really badly it just admits air all the time, but pulsed flow. "
@bobbyvisagie8315
8 жыл бұрын
Yeah it helped! Thanks!
@Sed1999Rav4
12 жыл бұрын
@joe1951 Thank you for your advice, please check out this quote that I found on the net "These are the symptoms of one failure mode of the EGR VSV (there are other failure modes where the CEL lights up). The rev range over which the hesitation / fluttering / jerking / stuttering occurs will depend on exactly how worn the EGR VSV is. - the broad range is 1,500 to 2,500 rpm, but may be narrower like 1,700 to 2,200 rpm.
@jonstuff
12 жыл бұрын
@Sed1999Rav4 The Dorman VSV worked for me and was a lot cheaper then the dealer(over a $100) I wouldn't think it would be the VSV without a light/code. My RAV was driving fine with this code but would get bad MPG's and fail the smog test. I think somebody might be sending you down the wrong path. I hate for you to start changing parts and not fixing the problem. It could be a lot of things but to me it sounds like a fuel problem, weak fuel pump, bad fuel filter, bad/dirty injector.
@jonstuff
11 жыл бұрын
Thank you so much!
@felipe40290
3 жыл бұрын
Tenes el diagrama de conexión de mangueras
@jonstuff
11 жыл бұрын
Thank you
@jonstuff
11 жыл бұрын
Just posted a video that might help you.
@Sed1999Rav4
12 жыл бұрын
@joe1951 Thank you Joe; As you said the VSV is fine. I am working on the fuel problem, I put some Chevron Techron (Fuel injector) on an empty tank then I fulled it up with premium gas (Super+) and it is running better but it not enough smooth like it should be. Any advice and tricks how to check injectors and clean them. Again tanks a lot.
@jonstuff
12 жыл бұрын
Thanks
@jeremygriffith81
2 жыл бұрын
I just had to do this on my 98 rav4, which has 233k mi , lol
@jonstuff
13 жыл бұрын
@boris2153 Dude you're welcome
@jonstuff
13 жыл бұрын
@MikeMiheli Thanks, I know there's a lot of info on the screen lol.
@jeffthepoet7
10 жыл бұрын
2:30 the what? the Car strap removed? you mumbled.
@jeffthepoet7
10 жыл бұрын
upon further reading below I believe you said, "Car shroud."
@jonstuff
10 жыл бұрын
jeffthepoet7 Yes, car shroud. It's harder talking while under the car on your back.
@jonstuff
12 жыл бұрын
@Sed1999Rav4 You might want to ask a real mechanic. Try this guy: Scotty Kilmer he has a youtube channel and you can send him a email with your question at: scottykilmer@gmail.com
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