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2000 Camry
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Discussion Starter #1 (Edited)
Hi all I’m new to the forum I have a 2000 Camry ce 4cyl 5speed
My cel keeps coming on p0401 code I think it’s pinpointed to the vsv switch as I’ve been reading thus far , I’ve changed everything except the vsv and gas cap question is where is it located and what steps should be taken to get to it ? All help appreciated :) (cheers)
Pics of my car in question
[URL
 

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Discussion Starter #2
all help appreciated , I had seen a YouTube video stating tht to get to it you should take off the front passenger wheel and access it from threw the wheel well and it’s located on the block somewhere ?
 

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How to change a VSV for egr on a 2001 camry 4 cyl

1997 Toyota Camry P0401 code Fix

EGR system parts info 5S-FE Toyota Camry 2.2 (at 4:22)


Aisin VST006 is the OEM part (it has an Aisin label over Toyota).
Don't forget 5% off: https://www.rockauto.com/en/moreinfo.php?pk=5275539

I also had to replace my EGR Vacuum Modulator with Dorman 911-609.


What was difficult was that when I could see it, I couldn't touch it. And when I could touch it, I couldn't see it. So the trick was to ** close my eyes ** and think/imagine it while I could touch it.

These were the steps I took. I did not take the wheel off. I did not have jack stands, and instead used large pavers from the backyard (felt safer this way than double-pin jack stands).


Put down newspaper and on it 1 large paver. Place scissor jack on top of large paver.

Jack up car until can: put down newspaper and 2 large pavers under passenger side tire.

Lower scissor jack until there is no tension, then raise until there is a little tension. Passenger side should be mainly supported by the wheel, and very little by the jack.


Move under car with head toward rear of car.


Put 12mm socket on wrench (ratchet).

Use left hand to insert wrench.

Use right hand, ** through wheel well **, to hold socket on 12mm bolt.
Use left hand to pull down (slightly, so does not break wire below) on wrench to loosen bolt.


Use right hand to remove bolt. Put aside.


Use right hand to remove electrical connector (use thumb to press down on tab).


Twist hoses back and forth to loosen and remove them.


Blow air into both hoses from top, to clear any debris.


Use left hand to hold valve, with thumb pressing on bolt. Use right hand to turn bolt into socket; continue until cannot screw further by hand.

Swing VSV toward right side (while making sure bolt does not come loose) to:

- Connect hoses. Hoses should go under knock sensor wire (see page 61 of Engine_Mechanical_I4.pdf).
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- Connect electrical connector. Should hear click.

Easier to see connections by looking from straight under (behind oil pan), instead of through wheel well.


Use left hand to insert wrench.

Use right hand to hold socket on 12mm bolt. Use left hand to tighten bolt.
 

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Discussion Starter #4
hey man ( andyk88) thanks for you’re info and help I definitely feel more confident now that I know exactly what to look for and how to proceed with this
(Cheers) man :) youve been a super great help
 

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Just take your time when you orient yourself under the car.

The Toyota part number mentioned by Peter Zafra in the first video is 25860-74050. But you can save money by buying the Aisin VST006 and reusing the backing plate.

I first made the mistake of buying a cheap non-OEM part from eBay (I figured it's just a switch). It only lasted 8 months.

Good luck!


P.S. Some more info from my notes. But I recommend just try what I have above before looking into these.

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I took these steps before I changed the VSV (in 8/2018):

Borrowed hand "vacuum pump" (not listed on website, but on sheet in store) from (a particular AutoZone).
There was one "vacuum pump" with a smaller black tube.

Created vacuum at EGR Valve while idling. Car died, so EGR Valve OK.

Pulled off tube from Q port of EGR Vacuum Modulator, revved up throttle.
There was vacuum from Q port (feel with hand, or see with a little stripe of paper, or use hand "vacuum pump"), so EGR Vacuum Modulator should be OK.

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Even though the EGR Vacuum Modulator seemingly tested OK, P0401 came back after I disconnected/reconnected battery (after replacing the VSV in 8/2018). I then replaced it with Dorman 911-609.

Because Dorman 911-609 is so cheap (e.g., walmart.com and store pickup) and so easy to change, I suggest just replacing it first.

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In 4/2019 P0401 came back because I used a cheap non-OEM part in 8/2018. This time I got the Aisin VST006.

A few short trips did not clear P0401. I got impatient and disconnected/reconnected battery.

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With engine off, VSV is not energized, and can create air flow (can blow air) between:
  • Tubing from Q port of EGR Vacuum Modulator.
  • Vacuum tubing from EGR Valve.
With engine idling, VSV is energized, and cannot create air flow between the above two.

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Discussions

https://www.tundrasolutions.com/forums/camry/35646-diy-camry-2-2l-2001-vsv/
VSV replacement

https://www.toyotanation.com/forum/103-camry-3rd-4th-gen-1992-1996-1997-2001-1st-gen-solara-1999-2003/615521-01-camry-2-2-p0401-won-t-go-away.html
ECU

http://www.automotiveforums.com/t615485-_97_camry__check_engine_code_p0401__insufficient_egr_flow.html
97 Camry

https://www.toyotanation.com/threads/egr-modulator.373848/post-3493796
Motor Magazine

https://www.toyotanation.com/forum/103-camry-3rd-4th-gen-1992-1996-1997-2001-1st-gen-solara-1999-2003/393322-stubborn-p0401.html
TE1 E1

https://www.toyotanation.com/forum/103-camry-3rd-4th-gen-1992-1996-1997-2001-1st-gen-solara-1999-2003/259343-p0401-engine-code-2000-camry.html
TE1 E1

https://www.toyotanation.com/forum/103-camry-3rd-4th-gen-1992-1996-1997-2001-1st-gen-solara-1999-2003/551442-p0401-remains-after-all-3-parts-replaced.html
R port vacuum

https://www.toyotanation.com/forum/103-camry-3rd-4th-gen-1992-1996-1997-2001-1st-gen-solara-1999-2003/1147505-p0401-egr-insufficient-flow-diagnosis.html
9/64 hose


How Do You Tell If the Vacuum Switching Valve on a 1998 Toyota Camry Is Bad?
https://itstillruns.com/do-1998-toyota-camry-bad-6933091.html

P0401 after new EGR valve, modulator and VSV valve - what else?
https://repairpal.com/p0401-after-new-egr-valve-modulator-and-vsv-valve-what-else-260

https://www.autozone.com/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c1528009266a

http://bgbonline.celicatech.com/89tech/egr function testing.pdf (Page 2)

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Replace VSV

SFI.pdf page 42 (from "1999 Toyota Camry Factory Service Repair Manual" that used to be floating around)

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Toyota part

https://www.amazon.com/Genuine-Toyota-25860-74050-Vacuum-Assembly/dp/B00G0OUZGY/
$58.37 (4/2019) Why so much cheaper than dealer (even online pricing), worry about fake?

https://parts.stevinsontoyotawest.com/p/63002145/2586074050.html
$85.63 (4/2019) Retail pricing (much) higher.

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Diagnosis

Emission_Control.pdf page 11

Toyota P0401 Insufficient Low EGR Flow RAV4 Diagnosis

Toyota EGR Valve Diagnostics - Back Pressure Modulated

How to test Toyota EGR System(VSV, Vacuum Modulator, EGR valve)

How to fix/diagnose Code P0401 Toyota - EGR Valve, Vacuum Modulator, Vacuum Switch Valve DIY

How To Fix Code P0401 1996 Toyota Rav4

https://www.toyotanation.com/forum/103-camry-3rd-4th-gen-1992-1996-1997-2001-1st-gen-solara-1999-2003/357502-diy-1mz-egr-code-p0401-p0402-diagnostic-repair.html
http://www.motor.com/magazine/pdfs/082009_04.pdf
http://www.motor.com/magazine/pdfs/092009_04.pdf
Later ones are for V6.

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EGR Valve

How to Replace Install EGR Valve 1997-01 Toyota Camry
https://www.youtube.com/watch?v=jRmTrlfI8js

Toyota Camry EGR Lesson - P0401
https://www.youtube.com/watch?v=ms5C6vDHCww

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you can save money by buying the Aisin VST006 and reuse the backing plate.
I am about to do just this. Already relocated the switch to the top of the engine as well. The Aisin VST006 is around $15 cheaper than the Toyota branded part that comes with a new metal backing plate. For some reason some parts interchanges only show the VST006 being for the V6, but if you go to Aisin parts webpage. it clearly shows it going in a 4 cylinder engine.
 

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My cel keeps coming on p0401 code I think it’s pinpointed to the vsv switch I’ve changed everything except the vsv and gas cap
Before you go spending money on a part, can you tell us what "everything" is? The VSV can be tested and if you look in the DIY sticky, there is a thread showing how to test/diagnose the VSV and also giving explanation on relocating it. It is here: https://www.toyotanation.com/forum/showthread.php?t=428469

Unfortunately, the photos are blurry due to Photobucket changing the rules after people made DIYs with their platform. You can still read the info and see general, if blurry, images.

If you want to relocate the VSV after verifying it needs to be replaced, you can simply disconnect the electrical plug and hoses and leave the old VSV where it is. No need to bother with removing it if you're going to replace it and put the new one in a more accessible location. If you want to remove it, I've done it a few times and the passenger wheel well is a common access point. I think I didn't need to remove the wheel, just turn the wheel all the way to one side or the other. Another way is underneath the car, from which you can see or feel the VSV, and if you don't have huge arms, you can get your hand(s) up there and remove it that way as well. Ditto what others have said about the brand of the VSV. Go with Toyota or Aisin (same thing). As a last resort, I had luck woth the Borg Warner brand. Don't go with the very inexpensive generic brands.

If replacing the hoses, most of them are 3.5mm inside diameter.
 

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The first two pictures shows the valve in it's more user friendly location. The rest show the new valve, which is identical to the original, except for the color. You reuse the metal bracket. Too soon to tell if this fixes the problem, but everything else tested good with my vacuum pump.

4 cylinder 2000 Camry.
 

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Discussion Starter #9
Wow lots of usefull info !!! I’ll be doing this procedure in the next upcoming weeks , I did test and clean the egr, I also cleaned the modulator, and it seemed to be new looking and clean before I did tht , so Im pinpointed to the vsv at this point, anyhow thanks guys all info and pics help appreciated so much usefull info , I’ll let you know how it turns out :)
 
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