Toyota

Have Toyota Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Toyota

1996 Toyota Camry: Check engine light is lit; code p0401..egr..Exhaust

Customer Question
I have 1996 Toyota Camry...
I have 1996 Toyota Camry, 2.2 liter. Check engine light is lit; Code P0401, which is EGR. Exhaust, gas insufficient flow. Changed EGR valve, VST valve, Checked vaccuum sources, changed vaccuum controller, also changed map sensor, checked for continuity at VST valve, and at the ECM. When light is cleared and car goes through a drive cycle light will come back on. Car does not have EGR temp sensor, so how does it know that there is insufficient flow?????
Submitted: 5 years ago.Category: Toyota
Show More
Show Less
Ask Your Own Toyota Question
Answered in 5 minutes by:
4/7/2012
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
Dieseljunky2
Dieseljunky2, ASE Certified Technician
Category: Toyota
Satisfied Customers: 3,947
Experience: Hi, what issues are you having? Thanks
Verified

Customer: Hello, have yo uh verified the egr passages are not stopped up? Apply a direct vacuum to the egr valve while the engine is idling. Does the engine stall or run very rough? If not, then the egr passages are clogged. Let me know what happens. Thanks
Customer :

Yes, I did and the car turns off immediately. Sorry I didn't include that earlier. Plenum is clear, the pipe from exhaust to EGR is clear also. What senses insufficient flow? On other Toyotas they have an EGR temperature sensor in the valve, which communicates insufficient flow to the ECM.

Dieseljunky2
Dieseljunky2, ASE Certified Technician
Category: Toyota
Satisfied Customers: 3,947
Experience: Hi, what issues are you having? Thanks
Verified
Dieseljunky2 and 87 other Toyota Specialists are ready to help you
Ask your own question now
Customer reply replied 5 years ago
I didn't mean to end our conversation. Do you have any other suggestions for the insufficient flow problem?
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
Put a vacuum gauge on the hose at the egr valve. Now flip the throttle full open a few times while running. Does the gauge move any? If not make sure the hoses are not cracked or stopped up. The system uses airflow to determine if egr is flowing.
Ask Your Own Toyota Question
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
Another thing, make sure you cannot blow through the solenoid valve with the electrical connector disconnected.
Ask Your Own Toyota Question
Customer reply replied 5 years ago

There isn't a blockage. I can't understand why the code is coming up insufficient flow when there isn't a blockage, and I replaced those parts as indicated earlier.

 

Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
IS there vacuum to both the solenoid valve and vacuum valve? I have seen the fittings get carboned over.
Ask Your Own Toyota Question
Customer reply replied 5 years ago
All the parts are new.
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
I am referring to where the hoses attach to the manifold. Make sure there is vacuum there. If there is no vacuum, then there will be no egr flow.
Ask Your Own Toyota Question
Customer reply replied 5 years ago
Yes, there is vacuum there also.
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
Verify the vacuum lines on the vacuum valve. Big one on bottom to egr valve. The 2 small ones on top close to each other both go to manifold vacuum. The single small one goes to the solenoid valve.
Ask Your Own Toyota Question
Customer reply replied 5 years ago
Diesel, can you tell me what detects the flow on this car??? I have checked all hoses and valves and there is plenty of vacuum.
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
The airflow changes as the egr valve opens, replacing fresh air with exhaust gas. This changes the fuel to air mixture and the oxygen sensors pick up the different reading. Now, as a side note, if the thermostat is bad and the engine is not reaching full temp, it will prevent egr operation by activating the solenoid valve.
Ask Your Own Toyota Question
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
The coolant sensor for this is on the water outlet by the distributor. It is the 2 wire one closest to the head.
Ask Your Own Toyota Question
Customer reply replied 5 years ago
Thank you, Diesel. I'll try it later.
Toyota Mechanic: Dieseljunky2, ASE Certified Technician replied 5 years ago
Ok
Ask Your Own Toyota Question
Ask Dieseljunky2 Your Own Question
Dieseljunky2
Dieseljunky2
Dieseljunky2, ASE Certified Technician
Category: Toyota
Satisfied Customers: 3,947
3,947 Satisfied Customers
Experience: Hi, what issues are you having? Thanks

Dieseljunky2 is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU!

JugheadUSA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Chris (aka-Moose)

Chris (aka-Moose)

Auto Technician

1,001 satisfied customers

16 years of experience

Marty

Marty

ASE Certified Technician

180 satisfied customers

ASE & Bosch Master Tech. 30 years experience.

Amedee

Amedee

Toyota Technician

1,229 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Anthony

Anthony

ASE Certified Technician

401 satisfied customers

ASE Master Automobile Technician with over 20 years exp. in this field.

Richard

Richard

ASE Certified Technician

9 satisfied customers

Toyota tech. ASE Certified Technician

Skyvisions

Skyvisions

ASE Certified Technician

12,737 satisfied customers

Toyota Master Diagnostic

Genchi Genbutsu

Genchi Genbutsu

Toyota Master Technician

3,761 satisfied customers

Toyota Certified Master Diagnostic Technician, ASE Master Technician with L1 Advanced Engine

< Previous | Next >

Related Toyota Questions
Looking for a diagram of 2012 4runner trail oxygen sensor
Looking for a diagram of 2012 4runner trail oxygen sensor locations … read more
Randall C
Randall C
Auto Technician / Consultant
Vocational, Technical or Trade Scho
12,307 satisfied customers
I have hade a 96 toyota Camry Manual Trans and 2.2L engine
Hi Edward, my name is***** have hade a 96 toyota Camry Manual Trans and 2.2L engine replaced with a less milage motor. I had a friend do it and it ran fine for a couple of weeks then died at stop ligh… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Engine lite on 2002 Toyota Camry, !-4, auto, 130,000 miles.
Engine lite on 2002 Toyota Camry, !-4, auto, 130,000 miles … read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
My 2000 Camry V6 displays the check engine light on code
My 2000 Camry V6 displays the check engine light on code P0171. … read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
2001 Toyota camry le 2.2 liter engine, this morning started
2001 Toyota camry le 2.2 liter engine , this morning started vehicle and tried to shift out of park it would not shift , car starts fine no electrical components are working light cluster no power any… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Have replaced engine with a used 2.2L on a 96 toyota camry,
have replaced engine with a used 2.2L on a 96 toyota camry, Engine ran fine for about a week. Just died at stop light, will not start engine turns over took distributor cap off and rotor is turning. C… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
I have Toyota 2002 RAV4 with malfunction of oxygen sensor
I have Toyota 2002 RAV4 with malfunction of oxygen sensor Bank 1 Sensor 2. Where it is? For RAV4 is bamk 1 on right hand side (passenger side)? … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Poor power and acceleration. 2004 Camry w/ 380k miles, from
Poor power and acceleration. 2004 Camry w/ 380k miles, from California, but now in Mn. Codes are P0420, P2238, P2423, and poss. 2nd code P0420. What is the likely cause and can I do this job myself?. … read more
Amedee
Amedee
Toyota Technician
Vocational, Technical or Trade Scho
1,229 satisfied customers
1997 Toyota Camry 5SFE engine california emmissions. Random
1997 Toyota Camry 5SFE engine california emmissions. Random cylinder misfire codes all 4 cylinders. Also P1210 error code. Car starts then stalls out unless bringing RPM's to steady 3,000. Blue smoke … read more
roy
roy
Associate Degree
3 satisfied customers
Check engine light is on. Stays on. 2005 Camry 4 dr. Opened
Check engine light is on. JA: Does the light stay on, or does it blink? Customer: stays on. JA: What is the model/year of your Toyota? Customer: 2005 Camry 4 dr. JA: Are you fixing your Camry yourself… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
My 2002 Camry engine cranks when turning the key but won't
Hi, my 2002 Camry engine cranks when turning the key but won't start … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
372 satisfied customers
Is it feasible to put a 1997 4cylinder Camry engine into a
Is it feasible to put a 1997 4cylinder Camry engine into a 1996 4cylinder Camry chassis? … read more
Gunvir Singh
Gunvir Singh
1,817 satisfied customers
My camry 2007 showing VSC check engine. I just bought it
i just bought it today i dont know anything about the code … read more
Gunvir Singh
Gunvir Singh
1,817 satisfied customers
2001 Camry 2.2L gas - replacing the exhaust system, and
2001 Camry 2.2L gas - replacing the exhaust system , and purchased a universal - O2 sensor question- I foolishly ( in hindsight) dumped the old resonator pipe with the O2 sensor, so can't use it as a … read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
12,737 satisfied customers
2011 CAMRY 4 CYLINDER CAR RUNS VERY ROUGH AND CHECK ENGINE
2011 CAMRY 4 CYLINDER CAR RUNS VERY ROUGH AND CHECK ENGINE LIGHT COMES ON AND OFF … read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
2010 Camry 4 engine ,automatic transmission. Do we need
2010 Camry 4 engine ,automatic transmission . Do we need change transmission fluid after drive 100000 miles. Thank you so much … read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
I have an exhaust leak in 2004 Camry LE in the front exhaust
I have an exhaust leak in 2004 Camry LE in the front exhaust section, flex pipe in front of catalytic convertor. Can this be fixed, replaced with regular exhaust pipe or does the entire section includ… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
I changed my pre cat oxygen sensors and in the process i hit
I changed my pre cat oxygen sensors and in the process i hit the shift cable on the transmission. now the vehicle shifts hard and is throwing a transmission error code. i displaced the cable approxima… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
12,737 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x