You can always do your own web research and get answers immediately .This is what I found. (see below) There are ways to clean an EGR valve. I would run some good fuel cleaner in for a few tanks of gas.

1. Join DateOct 2007LocationFort Worth, TxPosts375Liked1 times Rep Power8
   
   
   Re: 99 Camry V6: UBDII P0402 & P1411 = (EGR) VSV or EGR Position Sensor or VCV?
   
   
   In most cases when we get these codes in a dealership we replace the EGR valve. Typically only the position sensor is faulty and comes with the EGR valve. If it where my personal vehicle I would try the much less expensive position sensor on top of the EGR. As far as the vsv I personally have never seen a faulty one on the 1MZFE (V6) in about 15 years of dealership experiance. Good luck​
   
   
   
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2. 11-29-2007, 01:32 PM #3
   buckeyegal
   
   
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   Join DateOct 2007LocationDaytonPosts2Liked0 times Rep Power0
   
   
   Re: 99 Camry V6: UBDII P0402 & P1411 = (EGR) VSV or EGR Position Sensor or VCV?
   
   
   Hello and thank you for replying! This is very helpful, I really needed input to choose a starting point for fixing this. After hearing from you and doing more checking, I decided I'd be putting my time/money to better use in the EGR Position Sensor direction rather than fussing with the VCV. I took your advice about skipping the EGR valve at this point, and I put on a new position sensor just last week. So far so good; no problems and the check engine light has stayed off. Thank you for taking the time and sharing your knowledge with me, it is greatly appreciated.​
   
   
   
   

 

Thanks for the quick response. I actually did complete my own research, but stumbled upon this forum and thought maybe you all would give a more reliable & direct answer.
I actually did get some fuel cleaner; we'll see how that works.
Also, I will take the advice and just replace the sensor instead.

Thank you!

 

I'm going to give this a try. We had our 1996 Avalon worked on by a local shop when this happened a few years ago when we had the P0402 code. They replaced all of the vacuum hoses and I think one of the sensors like the EGR maybe. The light stayed off for 8 months and then came back on. I took it back and they could not figure out what was wrong and said it wouldn't hurt to drive it and that a car that old can pass the Texas inspection with 2 "not ready" issues so I just reset the check engine light and drive it until just before the P0402 clicks the check engine light.

 

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I had this same code come on. When I took it to my local shop, he said they put vacuum on the EGR valve itself and it held vacuum. Said if light came on again, check the EGR wiring, meaning in my mind, the related components. I bought a salvage VCV, for $25 but have yet to put it in as the bolts holding the engine cover on have been rounded out. I'll have to figure out a way to get them off but it seems like two vacuum hoses and an electrical clip. I'm hoping that will do it, can't wait to try. Good luck with yours.

 

EGR Issues

There are multiple treads on this issue. Basically clean out clog passages to EGR and replace egr position sensor and it fix your issues

 

Quick follow up on EGR issue. I never did get the cover off the engine, and CEL stayed on. Co-incidently, with warmer weather and not driving the car for a week, i notice starter beginning to labor. Old batt. was 6 yrs. old. Went to Sears for new one, replaced it myself and CEL has been off ever since.

Can't tell if it is cause and effect, but mechanics note spoke about checking EGR wiring. Perhaps it just needs a certain amount of juice the old batt. was unable to deliver.

Might want to consider a fresh batt. if existing one is old.

 

Wanted to add to this thread and mention that our '99 Avalon with only 64K miles on it popped up these codes about a week or so ago. The same P0402 and P1411. Since the EGR sensor on the '99 Avalon is right on top of the EGR diaphragm and easy to test, I'll be doing that first to see if it is in spec. Then I'll do some vacuum tests on the EGR itself to see if the car reacts by stumbling at idle accordingly as well. I have an older scan tool that reads the data stream as well as pulls codes and I'll see what it says as well.
Just have to get to the car back here as it's 150 miles from me at the moment as other family members are driving it :|.