Most of the time it is the EGR MODULATOR and/or the EGR VSV as described above. Make sure the vacuum lines are also CLEAN as are the throttle body ports.
Hi Everyone!
I'm also getting the gall'darn P0401 code. Additionally the car has started, several days ago, running rough under certain conditions, most notibly going uphill? Going to try to find fuel filter just in case and change that as well. Ideas, suggestions?
How do you clean the throttle body? And other parts as well... I sprayed and moved the (piston?) area of the erg, seems to be working OK, I can see it moving while working the throttle. Light suction stalls the engine.
Cleaned filter in the (modulator?), going to try blowing through the bottom today, other tests yesterday seemed OK.
Going to check and or replace the VSV today, hopefully. GREAT post about that by the way. Is this the only one everyone thinks needs changing? Is there only two, this one and one near the gas tank?
The rubber hoses on top to and from the egr and modulator are clear, haven't checked the ones going down yet. I'm going to look at those and the pipe feeding the bottom of the erg. Any info on cleaning those in case I can't see what to do with them? Other info appreciated.
Thanks much everyone!
__________________ FAST THINKERS DRIVE FAST! Why expect less?
76 Chevy K20, Parts available
79 Chevy K30 Dump, worker
01 Camry, wife's daily
05 Tundra, my daily
06 S2000, Toy
Last edited by BrokenYota; 04-24-2008 at 10:28 AM.
This was a most helpful write up. I changed the vsv on the wife's camry today... went by the write up and was done within an hour. Kudos to you my friend for making my life a little easier today.
Most of the time it is the EGR MODULATOR and/or the EGR VSV as described above. Make sure the vacuum lines are also CLEAN as are the throttle body ports.
Hi Everyone!
I'm also getting the gall'darn P0401 code. Additionally the car has started, several days ago, running rough under certain conditions, most notibly going uphill? Going to try to find fuel filter just in case and change that as well. Ideas, suggestions?
How do you clean the throttle body? And other parts as well... I sprayed and moved the (piston?) area of the erg, seems to be working OK, I can see it moving while working the throttle. Light suction stalls the engine.
Cleaned filter in the (modulator?), going to try blowing through the bottom today, other tests yesterday seemed OK.
Going to check and or replace the VSV today, hopefully. GREAT post about that by the way. Is this the only one everyone thinks needs changing? Is there only two, this one and one near the gas tank?
The rubber hoses on top to and from the egr and modulator are clear, haven't checked the ones going down yet. I'm going to look at those and the pipe feeding the bottom of the erg. Any info on cleaning those in case I can't see what to do with them? Other info appreciated.
Hey Jack, I'm assumin' these are pics of the same VSV not two different valves? Thanks, great info and help!
__________________ FAST THINKERS DRIVE FAST! Why expect less?
76 Chevy K20, Parts available
79 Chevy K30 Dump, worker
01 Camry, wife's daily
05 Tundra, my daily
06 S2000, Toy
that is correct, i noticed that it had problems getting to those pics now, so if anyone needs those again, let me know and i'll get htem up somewhere else.
Mossy Toyota in San Diego sells parts for 20% off list as well through their on-line store at Toyota Parts Cheap - Genuine OEM VSV was $57 plus shipping. Had the part in 4 days to Canada ! Watch for customs brokerage fees though from UPS Standard shipping to Canada though as it is a rip-off. USPS is best if you can.
Today I spent sometime to replace the vacuum solenoid valve for EGR for my Toyota camry 2.2L 2001. (Intermittient P0401 Check Engine Code problem.) For those who would like to DIY, I post what I did for your reference.
P/N: 25860-74050
The tools I used:
1. 12 mm 3/8 in. drive socket
2. 3/8 in. drive universal joint
3. 3/8 in. drive 18 in. extension bar
4. 3/8 in. drive ratchet
The steps are:
1. Disconnect battery.
2. Raise the car.
3. Unplug the connector. (You can not see it this step.)See attached picture.
4. Unscrew 12 mm bolt. (You can see the bolt but your hand may block your view while unscrewing it.) See attached picture.
5. Move the vsv to where you can see.(Now you can see it.)
6. Remove one of the vacuum tube and plug it to the same place on the new vsv.
7. Remove the other of the vacuum tube and plug it to the same place on the new vsv.
8. Move the vsv back. (Now you can not see it again.)
9. Screw 12 mm bolt back in.
10. plug the connector slowly until you hear a click sound.(You can not see it this step.)
BTW, It is very hard to reach it and most steps you can not see the vsv that you are working on. But if you know where it is, you can do it without seeing it.
Question just replace the same VSV for the EGR but know the car wont idle staedy and the car shuts off any suggestions?
I paid to the mechanic.He took out EGR valve and cleaned egr valve and its tubing with spray and then pressure wash.He put it back.After one day i did not get the codes po441 and po446 again but i got new code po401 ??
Please let me know what is it.My gas cap is tight.Do i need to replace with new gas cap or should i replace the Exhaust drum on back of my Camry-2000,4cyl, 150000KM .
I paid to the mechanic.He took out EGR valve and cleaned egr valve and its tubing with spray and then pressure wash.He put it back.After one day i did not get the codes po441 and po446 again but i got new code po401 ??
Please let me know what is it.My gas cap is tight.Do i need to replace with new gas cap or should i replace the Exhaust drum on back of my Camry-2000,4cyl, 150000KM .
P0401 is EGR LOW FLOW
You probably need the EGR modulator and VSV.
P0441/p0446 has nothing to do with the EGR. They are evaporative emissions codes. It is probably the CCV valve located on the air cleaner housing. There is a TSB for that.
__________________ 2002 TUNDRA AC 2WD = NOT STOCK
MODS: TRD LSD w/4.88's| TRD Headers | Flowmaster 50 Series SUV | TRD Supercharger | Hellwig Rear Sway Bar (custom end links) | TOYOTA Power Antenna | Rear "AIR RIDE" w/ on board compressor | De-badged | Raybrig Headlights & Nokya yellow Foglights | Keyless Upgrade to Full Alarm | Toyota Air Filter | Horn Mod | Map Light Mod | Back Seat Mod | STUBBS Sliders | AXIS Wheels w/315/75-16 Yokohama Geolander MT + | Home Link | SUPERLIFT Tru-speed-speedo Recalibrator | McKesh Mirrors l 3" Body Lift w/Poly Body Mounts l Gap Gaurds l Stainless Brake Lines l Poly Sway Bar Bushings l Poly Rear Leaf Spring Bushings l Clear/Red/Clear Tailights l Black Corners & Headlight Assy's l Diff breather Mod l Nu-Image Blue Flame Gauges l Eclipse AVN5435 w/ Rev Cam & 8 disk changer l Custom rear roll pan w/lights l RCD 6" lift w/ 3" blocks and AAL l Camburg UCA's l High Lift Jack l Daystar Front & Rear Bumpers l 4 Hella Black Magic Lights l Budbuilt Trac Bar l ICOM 706 MKIIG l Doran tire pressure sensors
24 yrs with TOYOTA
MDT/Shop Foreman/FINDLAY TOYOTA
ASE Certified Master Automotive Technician
Official Pro Comp Certified Installer & Dealer
Official ICON Certified Installer & Dealer
Certified Toyota Forklift Operator
Certified Locksmith
Ham Radio Operator = KE7WLF
P0401 is EGR LOW FLOW
You probably need the EGR modulator and VSV.
P0441/p0446 has nothing to do with the EGR. They are evaporative emissions codes. It is probably the CCV valve located on the air cleaner housing. There is a TSB for that.
Thanks a lot for nice info.regarding camry code po401.
Kindly let me know which part should I clean or replace now.Also let me know where is suggested part exactly located on Camry2000 4cyl. front side of engine?/Can a new person do it ??
The EGR Modulator is located next to the EGR valve on the top of the intake manifold by the firewall, it has 3 vacuum lines going to it. Clean the vac lines and replace the modulator.
The EGR VSV is located on the back of the cylinder head under the intake manifold and is very difficult to access without raiing the vehicle.
PM me for more info.
__________________ 2002 TUNDRA AC 2WD = NOT STOCK
MODS: TRD LSD w/4.88's| TRD Headers | Flowmaster 50 Series SUV | TRD Supercharger | Hellwig Rear Sway Bar (custom end links) | TOYOTA Power Antenna | Rear "AIR RIDE" w/ on board compressor | De-badged | Raybrig Headlights & Nokya yellow Foglights | Keyless Upgrade to Full Alarm | Toyota Air Filter | Horn Mod | Map Light Mod | Back Seat Mod | STUBBS Sliders | AXIS Wheels w/315/75-16 Yokohama Geolander MT + | Home Link | SUPERLIFT Tru-speed-speedo Recalibrator | McKesh Mirrors l 3" Body Lift w/Poly Body Mounts l Gap Gaurds l Stainless Brake Lines l Poly Sway Bar Bushings l Poly Rear Leaf Spring Bushings l Clear/Red/Clear Tailights l Black Corners & Headlight Assy's l Diff breather Mod l Nu-Image Blue Flame Gauges l Eclipse AVN5435 w/ Rev Cam & 8 disk changer l Custom rear roll pan w/lights l RCD 6" lift w/ 3" blocks and AAL l Camburg UCA's l High Lift Jack l Daystar Front & Rear Bumpers l 4 Hella Black Magic Lights l Budbuilt Trac Bar l ICOM 706 MKIIG l Doran tire pressure sensors
24 yrs with TOYOTA
MDT/Shop Foreman/FINDLAY TOYOTA
ASE Certified Master Automotive Technician
Official Pro Comp Certified Installer & Dealer
Official ICON Certified Installer & Dealer
Certified Toyota Forklift Operator
Certified Locksmith
Ham Radio Operator = KE7WLF
Re: Camry 2.2L 2001 VSV for EGR Replacement
Re: DIY: Camry 2.2L 2001 VSV for EGR Replacement
Linear Mode
