Nice vid! Those Harbor Freight pumps get the job done. The EGR Modulator ended up being the issue on my 2000 Toyota solara 2.2. Unfortunately, the light came back on after a few weeks :( I've ruled out the EGR valve and VSV valve. I've read that the MAP sensor can mess with supplying power to the egr system. Not sure, but hopefully you dont run into this issue. All the best.
Thanks! So far so good it's been going great for 6 weeks now and no more P0401. It was coming on every day for a couple weeks (took a while before I could work on it). Car seems to be running a lot better too. I'm not familiar with the 2000 model, is the intake similar? Did you try removing the EGR valve from the intake and check for carbon buildup where it connects to the manifold? That was the first thing I did before buying the vacuum pump but it hardly had any at all. I've seen some videos where it was badly clogged but would still pass the "kill engine" check. May as well clean the throttle body at the same time, and that idle air control valve. Mine was totally stuck. I don't think I ever read about the MAP sensor causing problems. Someone did mention there are 2 coolant sensors though, one is used by the ECM and the other for the gauge, but I couldn't verify that. If it's misreading that then it could open the EGR too soon before the engine was warm. I also replaced all of the capacitors in my ECM too.
@@erics3599 Good to hear about the code staying clear. Those 90's camrys are bulletproof, so they're worth keeping on the road. Very cool car. I'll check for any carbon build up in the areas you suggested. Thank you for the response. What's life without our man/guy projects? Lol Take care
@@erics3599 Hi. I haven't checked for carbon build up, actually. I pressed up into the EGR diaphragm with my finger to rule out the EGR. After hearing that doing this and having the car die from an idle is a tried-and-true-method to diagnose an EGR Valve, I called it good and moved on without actually taking it out and checking for carbon built up. probably Thanks for asking.
@@erics3599 But my check engine light went away a few ago. Go figure. I'm thinking that the aftermarket EGR modulator fails from time to time? Maybe its not as good of quality as an OEM part? Not sure, but we'll see how long it goes without setting off a check engine light.
Have a question, I have a 1996 Toyota Camry with exactly the same problem, I already changed the VSV valve, as well as the modulator and cleaned the EGR valve, however a few days later it comes back and I get exactly the same code, something I notice is that The p and r ports do not generate vacuum nor do they do what is seen in the video, I took out the acceleration body and they were clean, the only thing I don't really understand is where these ports get vacuum from because when you remove the acceleration body they are only visible from the holes where The joint would go because they are covered by the same joint... so I don't understand.
Sorry didn't see this comment until just now. I'm not sure about those two ports, I was just checking anything EGR related. Do you have an air compressor? See if they are plugged at all by blowing air into them. All your vacuum hoses are ok, no leaks? Do you have a vacuum gauge like the one I was using? Is your IAC valve ok? Mine was totally stuck, had to hit it with WD-40 and wiggle it to get it moving again, then put a better oil on it. Not sure if that would have anything to do with it but just thinking about what else is in that area.
I'm assuming you are referring to the vacuum tubing? I don't know. I ended up with a lot of extra tubing when I relocated the VSV so used a piece of that for EGR troubleshooting.
You're welcome. Yep still have it, it's my daily driver for work since it gets better mileage than my truck. Were you able to fix your P0401? I've actually thought about re-doing this video as the actual troubleshooting only takes a few minutes plus I left something out that I mentioned in the comments (testing the VSV with the car turned on but not running).
@@erics3599 I didn't honestly have a code in mine its 92 it doesn't throw code i guess but i replaced it anyway ez to do i uploaded video how to do it love my old toyota will keep it with and never sell it no matter what issues it will have it will get fixed
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Nice vid! Those Harbor Freight pumps get the job done. The EGR Modulator ended up being the issue on my 2000 Toyota solara 2.2. Unfortunately, the light came back on after a few weeks :(
I've ruled out the EGR valve and VSV valve. I've read that the MAP sensor can mess with supplying power to the egr system. Not sure, but hopefully you dont run into this issue.
All the best.
Thanks! So far so good it's been going great for 6 weeks now and no more P0401. It was coming on every day for a couple weeks (took a while before I could work on it). Car seems to be running a lot better too.
I'm not familiar with the 2000 model, is the intake similar? Did you try removing the EGR valve from the intake and check for carbon buildup where it connects to the manifold? That was the first thing I did before buying the vacuum pump but it hardly had any at all. I've seen some videos where it was badly clogged but would still pass the "kill engine" check. May as well clean the throttle body at the same time, and that idle air control valve. Mine was totally stuck.
I don't think I ever read about the MAP sensor causing problems. Someone did mention there are 2 coolant sensors though, one is used by the ECM and the other for the gauge, but I couldn't verify that. If it's misreading that then it could open the EGR too soon before the engine was warm. I also replaced all of the capacitors in my ECM too.
@@erics3599 Good to hear about the code staying clear. Those 90's camrys are bulletproof, so they're worth keeping on the road. Very cool car.
I'll check for any carbon build up in the areas you suggested.
Thank you for the response.
What's life without our man/guy projects? Lol
Take care
@@arrya5372 Did you try removing the EGR valve and check for carbon buildup?
@@erics3599 Hi. I haven't checked for carbon build up, actually. I pressed up into the EGR diaphragm with my finger to rule out the EGR. After hearing that doing this and having the car die from an idle is a tried-and-true-method to diagnose an EGR Valve, I called it good and moved on without actually taking it out and checking for carbon built up.
probably
Thanks for asking.
@@erics3599 But my check engine light went away a few ago. Go figure. I'm thinking that the aftermarket EGR modulator fails from time to time? Maybe its not as good of quality as an OEM part? Not sure, but we'll see how long it goes without setting off a check engine light.
Have a question, I have a 1996 Toyota Camry with exactly the same problem, I already changed the VSV valve, as well as the modulator and cleaned the EGR valve, however a few days later it comes back and I get exactly the same code, something I notice is that The p and r ports do not generate vacuum nor do they do what is seen in the video, I took out the acceleration body and they were clean, the only thing I don't really understand is where these ports get vacuum from because when you remove the acceleration body they are only visible from the holes where The joint would go because they are covered by the same joint... so I don't understand.
Sorry didn't see this comment until just now. I'm not sure about those two ports, I was just checking anything EGR related.
Do you have an air compressor? See if they are plugged at all by blowing air into them.
All your vacuum hoses are ok, no leaks? Do you have a vacuum gauge like the one I was using?
Is your IAC valve ok? Mine was totally stuck, had to hit it with WD-40 and wiggle it to get it moving again, then put a better oil on it. Not sure if that would have anything to do with it but just thinking about what else is in that area.
Спасибо !
I have the same code but my Camry is a V6 1MZ-FE. Gas cap already replaced.
What size tubing is that?
I'm assuming you are referring to the vacuum tubing? I don't know. I ended up with a lot of extra tubing when I relocated the VSV so used a piece of that for EGR troubleshooting.
thank you so much man very helpful info
u still have this car?
You're welcome. Yep still have it, it's my daily driver for work since it gets better mileage than my truck. Were you able to fix your P0401? I've actually thought about re-doing this video as the actual troubleshooting only takes a few minutes plus I left something out that I mentioned in the comments (testing the VSV with the car turned on but not running).
@@erics3599 I didn't honestly have a code in mine its 92 it doesn't throw code i guess but i replaced it anyway ez to do i uploaded video how to do it
love my old toyota will keep it with and never sell it no matter what issues it will have it will get fixed