Question about 1998 Toyota Camry

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Need a wiring diagram for a 1998 toyota camry for the vsv. replaced the transducer and vsv still getting code p0401 erg flow insufficient. any suggestion?

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  • 318 Answers

Start car with egr disconected. You should hear a sucking noise from said hole. If not you must clear this hole and there is your problem. If it is open then all thayt is left is the egr valve itself. hth

Posted on Nov 15, 2009

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How do you replace the Evaporation Control Valve and the ERG Valve on a 1997 Lexus ES300?


Anon, disconnect vacuum lines,wires, etc. and unbolt EGR from intake shown in 4th video link. Check the attached links,instruction and guides, Good luck
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Jun 15, 2016 | Lexus Cars & Trucks

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P0401 Error, Insufficient EGR Flow


In my case this was caused by a bad hose from the Throttle Body to the EGR Vacuum Switching Valve. Pictures are taken from the left side of the car except for the picture of the original hose. This is with the 4 cylinder engine. I used a piece of fuel/vacuum line that I had. It fit snugly which made my cost of repair zero.
write_tip-ozfypf1qpo1ph24coxgxyw5p-1-0.jpg
This is the end of the original hose with the crack plainly visible.

write_tip-ozfypf1qpo1ph24coxgxyw5p-1-2.jpg
Hose run from the throttle to the VSV

write_tip-ozfypf1qpo1ph24coxgxyw5p-1-5.jpg
Replacement hose at throttle (far right). This is where it was cracked.

write_tip-ozfypf1qpo1ph24coxgxyw5p-1-9.jpg
Replacement hose (far right) on the VSV.

on Oct 30, 2015 | 1996 Toyota Camry

2 Answers

What is the meaning of this code p0401


Exhaust Gas Recirculation Flow Insufficient Detected.

Oct 30, 2013 | 1998 Toyota Camry

1 Answer

Check engin light code po401 what does this mean.


P0401= Exhaust Gas Recirculation "A" Flow Insufficient Detected
for more info pls refer to this link http://www.obd-codes.com/p0401
this isn't really nothing major to worry about it just a emission code

Feb 27, 2011 | 1998 Toyota Camry

2 Answers

Check light on,problem shows on p 0401


P0401-Insufficient flow in the exhaust gas recirculation system (EGR-valve). Check your gas cap for cracked seal, check EGR valve (make sure all vacuum hoses aren't leaking), check also VSV (vacuum switching valve) for proper operation. Its best to get an owner's manual or an experienced mechanic to diagnose!!hopefully this helpd

Oct 06, 2010 | 1998 Toyota Camry

1 Answer

What's wrong with the code P0401 for camry 96


P0401 OBD-II Trouble Code
Insufficient EGR Flow
What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

May 06, 2010 | 1996 Toyota Camry

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

2 Answers

Code P0401 1998 Toyota Camry


I'm assuming that it is a four cyl.The p0401 code is for insufficient egr flow.Most of the time it is the egr vsv valve (vsv means vacuum switching valve)which is what controls the vacuum to the egr valve to open it.It is kind of hard to get to as it is on the block under the head on the back side.If you follow the hose from the egr valve it goes to the vsv.I have also seen mice eat holes in the vacuum line which would also give you problems.I hope this help and let me know if you have anymore questions

Dec 03, 2008 | 1998 Toyota Camry

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