Toyota

Have Toyota Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Toyota

2003 toyota matrix: catalyst..what needs to be done to repair

Customer Question
2003 toyota matrix code p0420...
2003 toyota matrix code p0420 catalyst deficiency what needs to be done to repair
Submitted: 8 years ago.Category: Toyota
Show More
Show Less
Ask Your Own Toyota Question
Answered in 2 minutes by:
9/28/2009
Toyota Mechanic: Eric, Automotive Repair Shop Manager replied 8 years ago
Eric
Eric, Automotive Repair Shop Manager
Category: Toyota
Satisfied Customers: 33,209
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

Hi,

 

Here are the possible causes of DTC P0420:

 

  • failed catalytic converter
  • exhaust leak between the exhaust manifold and the converter
  • damaged O2 sensor wiring harness after the converter(downstream O2).

You can visually check for chafed or burned wiring harness on the downstream O2 sensor. If damaged, that wiring harness will need to be replaced

 

Open hood and let engine idle and listen to exhaust sound. Now stuff an old rag or towel in the tailpipe and listen to exhaust again in the engine compartment. if it increases, then the exhaust will need to be repaired.

 

If all the above are ok, then it has to have a new catalytic converter, followed by a computer reprogramming.

 

Catalytic Converters are covered by a Federal Emissions Warranty for 8yrs or 80,000 miles, which ever comes first

Eric
Eric, Automotive Repair Shop Manager
Category: Toyota
Satisfied Customers: 33,209
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified
Eric and 87 other Toyota Specialists are ready to help you
Ask your own question now
Ask Eric Your Own Question
Eric
Eric
Eric, Automotive Repair Shop Manager
Category: Toyota
Satisfied Customers: 33,209
33,209 Satisfied Customers
Experience: 20+ yrs. experience as repair shop manager and technician.

Eric 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
91 4runner: 22re, it wont rev past 3000 rpm, no power
Have a 91 4runner with 22re, it wont rev past 3000 rpm, no power. seems fine under that rpm. is sounds like an ignition miss i do get a code for vehicle speed sensor, except i cant fine one on this ve… read more
Skyvisions
Skyvisions
ASE Certified Technician
High School or GED
12,737 satisfied customers
4Runner SR5: My 2001 Toyota 4Runner; the TRAC OFF and VSC TRAC
My 2001 Toyota 4Runner; the TRAC OFF and VSC TRAC lights came on and the CHECK ENGINE light came on at the same time. What does this mean? Is it serious? How serious? Can it be fixed by a local mechan… read more
AMD
AMD
Master Automobile Technician
Vocational, Technical or Trade Scho
980 satisfied customers
Car's engine was idling rough, slightly jerking the car back
Hello. Car's engine was idling rough, slightly jerking the car back and forth. Check engine light would blink on and off. At highway speed, didn't notice much of an issue. 25-30 mph occasionally a cou… read more
ted ritter
ted ritter
Team Leader/toyota master tech/retired
High School or GED
2,692 satisfied customers
Check engine light comes on. failure 0420 i changed the
check engine light comes on. failure 0420 i changed the catalytic converter and the code 0420 stil apears … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
I trying to clean my catalytic converter without removing
I trying to clean my catalytic converter without removing it. I've tried gas treatment, but my check engine light still comes on. … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
I have bought a replacement exhaust manifold with the
I have bought a replacement exhaust manifold with the catalytic converter and just want to make sure I go through the right steps to replace it myself … read more
Eric
Eric
Automotive Repair Shop Manager
33,209 satisfied customers
Gas or heavy exhaust smell in prius cabin while driving. Not
gas or heavy exhaust smell in prius cabin while driving … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
Ive got the 2AZFE 2.4L engine but i dont know where the
Hi there ive got the 2AZFE 2.4L engine but i dont know where the downstream o2 sensors go on the catalytic converter. I would like to replace them all and I'm having trouble identifying which o2 senso… read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 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
My 2001 Toyota Avalon was given a new catalytic converter,
My 2001 Toyota Avalon was given a new catalytic converter, as Pete suggested, but I still have a problem. The car emits a cloud of blue smoke when starting up and occasionally when starting from an in… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My 2006 Sienna makes a low chugging noise like an exhaust
My 2006 Sienna makes a low chugging noise like an exhaust leak, but I can't find a hole anywhere. Then when the car warms up (maybe as the water pump or AC turns on) the sound nearly goes away… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 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
Getting and engine light and AutoZone says it is the
getting and engine light and AutoZone says it is the catalytic converter … read more
Gunvir Singh
Gunvir Singh
1,817 satisfied customers
I had new catalytic converter, all new oxygen sensors down
Hi I had new catalytic converter, all new oxygen sensors down stream n upstream engine light went off until I driven car 60miles and the light return and the code is stating po171 and I've checked for… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
Is the catalytic converter the same on the 2001 as on the
is the catalytic converter the same on the 2001 as on the 2004? Are they interchangeable? … read more
Eric
Eric
Automotive Repair Shop Manager
33,209 satisfied customers
Ron, I ordered a catalytic converter for my 2003 Toyota
Hey Ron, I ordered a catalytic converter for my 2003 Toyota Camry LE 2.4L. It is CARB compliant and a direct fit. So it bolts on perfectly. I was told that I need a cat with a different engine family … read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
How do I know which catalytic converter is bad on my 2003
Hi pearl how do I know which catalytic converter is bad on my 2003 Toyota Camry 2.4L ( California). The check engine light has been on for 2 days and when scanned displays the code p0420? … read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
I'm changing to catalytic converters are there any special
I'm changing to catalytic converters are there any special tools I need I cant get the manifold bolts off … read more
Eric
Eric
Automotive Repair Shop Manager
33,209 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