Honda

Have Honda questions? Ask a Honda repair expert.

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

P0420 code on Honda Pilot 2005. But it comes back on. I need…

P0420 code on Honda...

P0420 code on Honda Pilot 2005

Mechanic's Assistant: Just to clarify, what's the exact code? And have you tried to reset it?

Yes but it comes back on

Mechanic's Assistant: Are you fixing your Pilot yourself? What have you tried so far?

I need to pass inspection

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I am planning on doing it myself

Show More
Show Less
Ask Your Own Honda Question
Customer reply replied 9 months ago
Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer reply replied 9 months ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call.
Answered in 9 minutes by:
7/3/2017
Eric
Eric, Automotive Repair Shop Manager
Category: Honda
Satisfied Customers: 34,019
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

HI,

Ok, this is for Bank1(rear bank) catalytic converter. You need to check for exhaust leaks and repair as found. If ok, then the rear back catalytic converter will need to be replaced - see attached directions

One problem you may run into is snapping off the studs when trying to remove the nuts for converter as well as snapping off the bolts for it due to heat corrosion. If this happens, then you can be looking at removing the cylinder head to have the broken bolts extracted.

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating

Please remember to rate service using the separate rating page. Thank you

Ask Your Own Honda Question
Customer reply replied 9 months ago
The light goes off once a year for a couple of days. Do you think using a catalytic converter cleaner/gas additive may work enough pass inspection?

HI,

You can try cataclean and see if it will turn the light off long enough to pass inspection. It works about 50% of the time. Most major parts stores carry it

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating

Please remember to rate service using the separate rating page. Thank you

Ask Your Own Honda Question

I noticed we have not yet resolved your concern you asked about. I would sure appreciate it if you would reply so I can offer my skills and knowledge and repair guide access to help as best I can.

~Do you still need more help?
~Confused by my info request or answer?
~Need more time?
~Confused on how the site works?
~Need more detail or a different explanation?

If the answer is YES to any of these just press reply and lets work on this concern some more.
Please remember to rate service using the separate rating page. Thank you

If you have new questions now or in the future please do not hesitate to ask them. If you would like me to assist you. Just bookmark this page so you can access my profile easy and post a new question from the question box on my profile page

Eric
Eric, Automotive Repair Shop Manager
Category: Honda
Satisfied Customers: 34,019
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified
Eric and 87 other Honda Specialists are ready to help you
Ask your own question now
Customer reply replied 9 months ago
Thank you for your reply but I am going to try a catalytic converter cleaner first if it does not work then I will probably take it to a mechanic.
Was this answer helpful?
Ask Eric Your Own Question
Eric
Eric
Eric, Automotive Repair Shop Manager
Category: Honda
Satisfied Customers: 34,019
34,019 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 very much for saving my daughter and her family a lot of money on her Honda. You are definitely on my list for future help. Thanks, again.

FredUSA

I just heard from my mechanic. You were right...a $45.00 job. THANK YOU!! Your response was received in less than 10 minutes!!

Linda B.USA

Your answers were clear and the diagrams were perfect. Dealer wanted $87 for an hour of labor and even I did it in 15 minutes.

EdUSA

HONDA PLATINUM was great. I really appreciate his help. I was ready to trade my new Honda until he told me to wait until I got 3,000 miles on it and my gas mileage would get much better.

SummerUSA

I took the Power Steering O-Ring service bulletin linked from JustAnswer to my Acura dealer, and not only did they no-charge the o-ring, they also replaced the power steering pump at no cost.

Gary RStevenson Ranch, CA

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

< Previous | Next >

Meet the Experts:

Kyle N.

Kyle N.

Honda Master Tech

3,635 satisfied customers

Honda Dealer Tech, ASE Master Auto Tech

John G.

John G.

Honda Technician

2,643 satisfied customers

Dealership tech since 1982. ASE and Honda Master Technician.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

531 satisfied customers

16 years of experience

Marty

Marty

Bosch Master Tech

131 satisfied customers

Bosch Certified Master Technician

Amedee

Amedee

Former ASE Master Technician

1,417 satisfied customers

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

Ron

Ron

ASE Certified Technician

399 satisfied customers

ASE Certified Tech 34 years.

thebesthonda

thebesthonda

ASE MasterTechnician

2,299 satisfied customers

26 years experience

< Previous | Next >

Related Honda Questions
My TPMS light on my 2005 Honda Pilot keeps coming on while
My TPMS light on my 2005 Honda Pilot keeps coming on while driving with no other lights. For troubleshooting I have deflated two tires, I get the tire tire light, but no light for the associated tire.… read more
Anthony P.
Anthony P.
high school
43 satisfied customers
My father has a 2003 Honda pilot (no remote only the 2
hello my father has a 2003 Honda pilot (no remote only the 2 keys). he wants to deactivate the alarm system because it keeps going off... the lock doors system also doesn't work from the inside ( the … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
399 satisfied customers
Myhonda pilot was in a recaall my driver side air bag was
myhonda pilot was in a recaall my driver side air bag was replaced and the passenger side was also on recall after they change the passenger airbag was replaced the seat belt light at the passenger si… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
My 2012 Honda Pilot is making a knocking noise while making
My 2012 Honda Pilot is making a knocking noise while making sharp left turns. Seems to be worse in cold weather. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I am getting a 61-1code on my 07 Pilot. Battery voltage
Hello, I am getting a 61-1code on my 07 Pilot. Battery voltage malfunction. With that, I am getting codes that all cylinders are misfiring but the truck starts and runs too good to have all cylinders … read more
MASTER TECH
MASTER TECH
Master Tech
Vocational, Technical or Trade Scho
4,807 satisfied customers
I have a 2011 Honda Pilot with 128,000 mi. There is a
I have a 2011 Honda Pilot with 128,000 mi. There is a knocking noise under the valve covers upon cold starts. It quiets down when warm. I read on-line that it might be that the bridge bolts need to be… read more
Dan
Dan
Dealership Technician
Associate Degree
2,008 satisfied customers
I need a reset code for my 2005 Honda Pilot my serial
Hi I need a reset code for my 2005 Honda Pilot my serial numbers are U1110 L5021 Thank you … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
No air from center dash vents on '05 pilot. Air blows to
no air from center dash vents on '05 pilot. Air blows to floor and side vents only. … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,050 satisfied customers
Changed battery of my hands pilot 2004 and radio shows code.
Changed battery of my hands pilot 2004 and radio shows code … read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
2018 honda rear lights are not working. 2018 honda pilot
2018 honda pilot back lights are not working I husband is being pulled over right now by the police … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
475 satisfied customers
2012 Pilot front window defroster is not working. The air
2012 Pilot front window defroster is not working. The air comes out other vents … read more
Chris (aka-Moose)
Chris (aka-Moose)
Technician
Vocational, Technical or Trade School
531 satisfied customers
I have a 2011 Honda Pilot and my tailgate handle is broken.
I have a 2011 Honda Pilot and my tailgate handle is broken. I purchased a replacement and trying to find instructions on how to do it … read more
Eric
Eric
Automotive Repair Shop Manager
34,019 satisfied customers
We have a 2008 Honda Pilot. On the freeway Going @70 it
Hi. We have a 2008 Honda Pilot. On the freeway Going @70 it starting jumping. Orange malfunction indicator lamp came here on. Just had it serviced two days ago. Leslie … read more
Honda-Man
Honda-Man
Associate Degree
3,100 satisfied customers
My 2016 Pilot lights (ALL LIGHTS and the camera will not
My 2016 Pilot lights (ALL LIGHTS and the camera will not turn off … read more
Chris (aka-Moose)
Chris (aka-Moose)
Technician
Vocational, Technical or Trade School
531 satisfied customers
2017 Honda Pilot with lights in cabin remaining on. All
2017 Honda Pilot with lights in cabin remaining on. All doors and hatch secured. Is there anything to do to turn them off? … read more
vwtech0405
vwtech0405
VW Technician
Associate Degree
8,868 satisfied customers
Honda 2007 Ridgeline with 203,000 miles, catalytic converter
Honda 2007 Ridgeline with 203,000 miles, catalytic converter engine light on but performance not affected yet. It is very costly to replace (estimated to be about $2,000). Is it dangerous to leave alo… read more
Jared D
Jared D
Shop Supervisor
Bachelor\u0027s
3 satisfied customers
Second opinion] Trying to change no 1 catalytic converter in
Second opinion] Trying to change no 1 catalytic converter in my 2010 Honda CR-V. Got it all unbolted but it will not fit between firewall and valve cover or anywhere else. Whats the secret for getting… read more
Curtis
Curtis
Vocational, Technical or Trade Scho
1,697 satisfied customers
Second opinion] Trying to change no 1 catalytic converter in
Second opinion] Trying to change no 1 catalytic converter in my 2010 Honda CR-V. Got it all unbolted but it will not fit between firewall and valve cover or anywhere else. Whats the secret for getting… read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 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