Question about 1998 Toyota Camry

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Check engine light 1996 camry

Ive replaced the EGR the VSV and the modulator and i still get the egr codes. Could it possibly be the EGR silenoid? Cant think of anything else it could be.

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  • Superbovine May 11, 2010

    Which codes exactly? Is it the 4 cylinder or the V6 model?

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1 Answer

Egr vacuum solenoid location


what type of toyota u have or if u can give me the engine code i might b able to help u

Dec 08, 2011 | Toyota Camry Cars & Trucks

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1999 toyota RV4 code P0401 EGR is good ,   vacuum line is good , what parts could be check.


It means that the egr valve is working, the problem is a very common one, it's the egr modulator valve and to some extent the vacuum switching valve(VSV) for the egr valve, the modulator is attached to the egr valve, remove it and if air can pass from the bottom port through it is defective, in that case replace it and see if it takes care of the problem, if the valve is ok the egr
vsv should be replaced.

Feb 13, 2010 | 1999 Toyota RAV4

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Every now and then the car wants to stall but it does not


You have verified the EGR valve will operate when vacuum is applied so the valve and chambers are good..correct? If thats the case, then
your issue here is the VSV (vaccum switching vavle), these intermittently get stuck. Follow the vaccum lines down behund the intake, you will find the vsv located on the back side of the block just above where the drive axle mounts to the block.
Replace this VSV and the modulator valve at the same time, they tend to fail togather.
Good luck, i hope this helps...please rate me a fixya

Jul 31, 2009 | Toyota Camry Cars & Trucks

2 Answers

Engine lt on


There is a vsv (vacuum switching valve) located under the intake manifold that goes bad very often causing this code. Its hard to get to. Follow the hoses from the black plastic round valve(egr modulator) you see next to the EGR valve to find the vsv.

Apr 02, 2009 | 2000 Toyota Camry

1 Answer

Code P0401 toyota Camry 3.0 v6


replace the vsv that has the vacuuum hose running from it to the egr valve

Feb 21, 2009 | 1998 Toyota Camry

3 Answers

Code on diagnostics p0401


Code on diagnostics p0401:

What is going on?
Exhaust Gas recirculation low flow detected means that: there is vacuum problem in the EGR system - between the combustion chamber, EGR valve (mechanical - blown up diaphragm or clogged airlets/hoses) , EGR Modulator Valve (mechanical - blown up diaphragm, dirty EG/air filter or clogged airlets/hoses) and Vacuum Switching Valve ((mechanical - blown up diaphragm or clogged airlets/hoses OR electrical - VSV not properly synchronizing with the ECM, for instance).

Effects?
This causes the combustion chamber temperature to increase and produce Oxides of Nitrate (NOx) that is out of an acceptable emission range. This triggers the Malfunction Light (check engine light) to stay on (after a couple of driving cycles)!
Solution: Focus on EGR airways (hoses...) and organs (EGR valve, EGR Modulator, VSV), clean, check or replace the defected one. VSV seems to be criticale as it plays electrical & mechanical function. Once the repair is done, Clear the P0401 code using an OBII scanner.

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2 Answers

Egr code


REPLACE the EGR valve and gasket, stop being cheap. sometimes there are things that cant be fixed. It could have a micro crack in it or a bad spring. Just brake down and replace it. I have been there so many times. You smack your head into the wall for hours on something that you dance around for months. Let me know once you replace it.

Tepfy

Oct 10, 2008 | 1994 Toyota 4Runner

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