Question about 1999 Toyota Camry

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1999 Toyota Camry, 4 cylinder. engine check light is on, got P0406 code with Scanner. Do some research, looks like it is EGR valve position sensor circuit issue, but got confused with message here. someone mentioned that there is no EGR valve position sensor with 4 cylinder 1999 Toyota Camry. what can I do to fix this error? Thanks for the advise in advance!

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REPLACE THE EGR VALVE ASSEMBLY !

Posted on Aug 06, 2010

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I had the same code. Apparently this can be caused by a loose gas cap. Mine was tight but there was minor rust around the top of the fuel pipe where the cap goes on.

I took some sandpaper and did a light sanding around the opening to get a better seal. Problem has been gone for a year now. Same gas cap!

Posted on Aug 18, 2010

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Blue smoke comming out of exhaust toyota pickup 94

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

toneman2121
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SOURCE: check engine light on-code says egr valve is bad

the egr system consists of control circuits as well as the egr valve itself. troubleshooting will have to be performed in order to pinpoint the fault. the valve may just need cleaning. there may be damage in the long run since the egr system introduces exhaust gas to the air intake to reduce combustion temperatures.

http://www.aa1car.com/library/egr.htm

Posted on Apr 21, 2010

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SOURCE: i have a 1999 toyota

there is also a vac. switching valve for the egr that also goes bad.to find the valve follow the vac. line that is hooked to the top of the egr to the valve.it is located on the back of the motor up under the intake and is a pain to replace. if you have a hand held vac. pump hook it to the egr valve and pump it up and see if the engine dies if it does i would replace the vac. switching valve.if it does not die then i would start looking for carbon on the inside of the intake on the back side of the throttle body plate.and also carbon will build up at the intake where the egr bolts to it...before i messed with the vac. switch i would look inside of the throttle body behind the throttle plate and see if the passage that goes to the egr valve is stopped up with carbon and you will need a small round mirrow and a flashlight....if the car does not die when you do the vac. pump test it is easier to take the throttle body off to clean and to check....been working on toyota and lexus for 25 yrs and have seen it all so let me know if i can help in any other way..........good luck and if i did my job let me and fixya know and a thumbs up............thanks.......

Posted on Jun 21, 2011

ita_castanon
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SOURCE: Difficulty to replace EGR valve in 1999 totyota camry 4-cyl automatic

Not difficult at all to service the EGR Valve using a #12 mm socket wrench it is a five minutes job. However the VSV is another history and very difficult to be reached unless you have an elevator After the engine begin stalling I double checked the EGR which was completely carbonized. I cleaned it and also replaced IAC checked VSV and all sensors, but the engine follows stalling. Now I am looking for the Charcoal Canister which I simply can't find where it is located, then I will check the vacuum lines and the transmission sensors, but I have heard that EGR despite cleaned can keep bringing troubles. By the way, anyone has ever heard where in the car is installed the charcoal canister

Posted on Aug 30, 2012

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1 Answer

P0406 engine codes


form the fsm
i paste
Possible causes
- EGR Valve clogged, dirty or leaky
- EGR valve damaged/defective
- EGR volume control solenoid valve
- EGR temperature sensor and circuit
- EGR volume control solenoid valve harness is open or shorted
- EGR volume control solenoid valve circuit poor electrical connection

the tests are in the FSM. or here
http://www.scantool.net/software/alldata-diy-1-month-subscription.html

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