Toyota

Have Toyota Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Toyota
This answer was rated:

Toyota Camry: I have a 1999 Toyota Camry 3.0 Six Cylinder vehicle

I have a 1999 Toyota...
I have a 1999 Toyota Camry 3.0 Six Cylinder vehicle with over 100,000 miles on it. My check engine light went on, so I had a diagnostic test taken and it was reported a p0401 reading for Exhaust Gas Recirculation flow Insufficient Detected and a p0172 Bank 1 system too rich pending according to the detectors. What do I need to have done to the vehicle to correct the problem?
Show More
Show Less
Ask Your Own Toyota Question
Answered in 8 minutes by:
2/10/2013
autodoc_2000
autodoc_2000, Auto Technician
Category: Toyota
Satisfied Customers: 2,563
Experience: ASE Master Tech W/Advanced Engine Performance
Verified

autodoc_2000 :

The P0401 is as you wrote is for EGR insufficient flow. The most common failure on these is the EGR position sensor which is mounted on top of the EGR valve. The sensor indicates the wrong reading to the PCM (Powertrain Control Module). Sometimes though the EGR valve itself fails. If this happens the only way to get the valve is with the sensor attached. You can check the valve to see if it is working by using a vacuum pump and applying vacuum to the valve with the engine running to see if the engine dies. If it dies the valve is working correctly. If it does not then the valve is not working.

Customer:

What about the corresponding p0172 reading?

autodoc_2000 :

The way an EGR valve works is it directs exhaust gas into the intake to be reburnt the exhaust leans out the system if it is not allowing the EGR gasses the oxygen sensors will think that it is running rich. Fix the EGR fault and it may take care of the rich condition.

autodoc_2000
autodoc_2000, Auto Technician
Category: Toyota
Satisfied Customers: 2,563
Experience: ASE Master Tech W/Advanced Engine Performance
Verified
autodoc_2000 and 87 other Toyota Specialists are ready to help you
Ask your own question now
Ask autodoc_2000 Your Own Question
autodoc_2000
autodoc_2000
autodoc_2000, Auto Technician
Category: Toyota
Satisfied Customers: 2,563
2,563 Satisfied Customers
Experience: ASE Master Tech W/Advanced Engine Performance

autodoc_2000 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

965 satisfied customers

16 years of experience

Marty

Marty

ASE Certified Technician

175 satisfied customers

ASE & Bosch Master Tech. 30 years experience.

Amedee

Amedee

Toyota Technician

1,225 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

12,676 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
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
The a/c compressor on my 2000 Camry LE (4 cyl) runs almost
The a/c compressor on my 2000 Camry LE (4 cyl) runs almost constantly, even when the pushbutton for the A/C is off. I can hear and feel it in the engine laboring and the MPG drops. The only way to sto… read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 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
175 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
1,702 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
1,702 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
12,676 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
I have a 2007 Camry v6 with a 150k..my check engine light
I have a 2007 Camry v6 with a 150k..my check engine light came on brought it to my mechanic and said ignition coil 6 misfired..so I had him replace all 6 coils and spark plugs. Drove the car for a day… read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 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
My 1996 toyota camry has a 4cly 2.2l engine. In the last few
In the last few weeks it's been having problems staying started. 92,000k (yup that's all) automatic … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
2001 camry making humming noise coming from engine. 160,000
2001 camry making humming noise coming from engine … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
I have a 1992 3.0 Toyota Camry. Starts fine but after a
I have a 1992 3.0 Toyota Camry. Starts fine but after a minute or two it starts missing and smoking grey smoke . I've changed all three oxygen sensors . Cleaned throttle body and idle control valve . … read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 satisfied customers
I have a 2009 camry and the vsc, anti slip and engine light
Hi i have a 2009 camry and the vsc, anti slip and engine light has come on. Ive booked my car in for a transmission service as the oils black and burnt. Just wondering if this could contribute or its … read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Can I know a Toyota Camry 2004 with a engine 4CL (310.000
Can I know a Toyota Camry 2004 with a engine 4CL (310.000 km) ..and well general maintenance could run for how many kilometers more. It a good option to buy it? … read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
2004 Camry SE V6, engine light on, no throttle response
2004 Camry SE V6, engine light on, no throttle response engine just idles....suggestions … read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
The check engine light went on in my 1998 Toyota Camry, took
The check engine light went on in my 1998 Toyota Camry, took it to be checked out & was told it needed to have a fuel induction service. Service done but engine light back on. Returned to shop, said i… read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 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
12,676 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