Jeep

Have Jeep questions? Ask a Jeep repair expert for answers

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

2016 jeep wrangler unlimited sahara check engine light solid…

2016 jeep wrangler unlimited saharacheck...
2016 jeep wrangler unlimited saharacheck engine light solid on for P0420No exhaust leaks and we already replaced the 02 sensor twicecode still comes back on after a day or two of driving
Show More
Show Less
Ask Your Own Jeep Question
Answered in 5 minutes by:
11/16/2017
Pete
Pete, Technician
Category: Jeep
Satisfied Customers: 32,878
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.
Verified

Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

This code indicates the catalytic converter is not operating properly.If there are no exhaust leaks or after market exhaust components and no damage to the exhaust components and you replace the oxygen sensor in most all cases the catalytic converter assembly has to be replaced to resolve this fault here.I would say 99% of the time the catalytic converter assembly has to be replaced for this code unfortunately.All that is listed here above needs checked first and if all o.k. then it needs replaced.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service,your 5 star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Pete
Pete, Technician
Category: Jeep
Satisfied Customers: 32,878
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.
Verified
Pete and 87 other Jeep Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a jeep mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Pete Your Own Question
Pete
Pete
Pete, Technician
Category: Jeep
Satisfied Customers: 32,878
32,878 Satisfied Customers
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.

Pete 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 so much for your answer. My initial estimate was $325; I got it done for $100 - part and labor.

Lynn B.Ormond Beach, FL

I was skeptical at first but thought I'd give it a try. I was pleasantly surprised. Your site actually is a quality service that I would recommend to others in a heartbeat.

StanSayre, PA

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

< Previous | Next >

Meet the Experts:

Chris

Chris

Shop Foreman

3,578 satisfied customers

Jeep Certified Master Tech

Mark

Mark

22 Year Factory trained technician

2,649 satisfied customers

Jeep factory training........25 years in the industry.

Dave

Dave

Jeep Master Tech

1,149 satisfied customers

Chrysler Triple Master, ASE master Tech AA degree in Auto.

moparfl

moparfl

ASE Certified Technician

1,130 satisfied customers

ASE Master Tech Chrysler Dodge Jeep Master Tech

Tim Mohr

Tim Mohr

ASE MASTER TECH

1,052 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Ron Z.

Ron Z.

- Jeep Tech -

641 satisfied customers

18+yrs experience. State Inspector & Jeep Diagnostics/Repair

jeepmopar76

jeepmopar76

Jeep/Chrysler Triple Master Tech

579 satisfied customers

32yr ASE Master Tech, 9yr Chrysler Master Tech, 19 yr Jeep Dealership service including AMC/Eagle

< Previous | Next >

Related Jeep Questions
Just got in jeep and started it. Noticed that the dash
hi....just got in jeep and started it. Noticed that the dash controls (i.e. gas gauge, oil, temp) were not working and the wipers were on. I tried to turn wipers off but they wouldn't go off. Ran jeep… read more
Chris
Chris
Shop Foreman
3,578 satisfied customers
Wont turn over. 2008 jeep wrangler unlimited x. Changing
changing timing chain beause I had no spark ! after I changes now I have aweak spark and I ust notice my plugs are wet with gas … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I swapped out my pcm. Locksmith came out and rekeyed. Now it
I swapped out my pcm. Locksmith came out and rekeyed. Now it won't turn over and security light stays on. I have an after market Bullydog programmer that reads the codes. It's telling me wrong securit… read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
96 satisfied customers
Wrangler JKU Sahara: I bought my 2012 Jeep Wrangler JKU
Hi I bought my 2012 Jeep Wrangler JKU brand new almost two years ago. For almost the last year the check engine light has been turning on. Each time I take it in for service it winds up being an oxyge… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
wrangler: 2007 wrangler unlimited check engine code o0440 evac
2007 wrangler unlimited check engine code o0440 evac problem canister ok evac hose replaced purge valve replaced intake manifold slight leak replaced gasket gas cap light came on gas cap replaced chan… read more
Chris
Chris
Shop Foreman
3,578 satisfied customers
Wramler unlimited: My 2005 jeep wrangler unlimited with the
My 2005 jeep wrangler unlimited with the 4.0 litre keeps showing CEL, I put my code reader on it it shows po141. O2 sensor downstream bank 1 heater circuit. I toned all the 4 wires back to the ecm and… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
My2005 jeep wrangler unlimited shows codes of P0141 channged
My2005 jeep wrangler unlimited shows codes of P0141 channged 02 sensors all 4 of them but the light still come on saying bank 1 sensor 2 heater circut malfunction,… read more
Brad
Brad
Technician at Dodge Dealership
Vocational, Technical or Trade Scho
12 satisfied customers
wrangler sahara unlimited: I have jeep wrangler sahara unlimited
I have jeep wrangler sahara unlimited 2008, engine 3.8 199KM, I live in Sweden, Europe. Some weeks ago check engine light came on and it shows codes p0138 and p0158. My mechanik changed oxygen sensors… read more
Chris
Chris
Shop Foreman
3,578 satisfied customers
My 1998 jeep wrangler 4 cyl 2.5 L is only getting 150 miles
my 1998 jeep wrangler 4 cyl 2.5 L is only getting 150 miles to a tank of gas and ive done everything that i can think of to fix the problem what all could the problem be… read more
Chris
Chris
Shop Foreman
3,578 satisfied customers
Wrangler Unlimited: 2004 Jeep Wrangler Unlimited, Automatic.
2004 Jeep Wrangler Unlimited, Automatic. I have done a few trips this month with a trailer since we moved 3 hours away. On the last trip on friday just before getting to my new home with a load the je… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
2008 Jeep: 4x4..50k miles..engine light comes..module cost me $ 650
Have a 2008 Jeep unlimited 4x4 with 50k miles on it. All of a sudden the engine light comes on and the red "flash" light also the temp gave goes to zero. Car still runs. Had car at Naples Dodge/Jeep t… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
2007 Jeep Wrangler Unlimited Sahara: 3.8L..V6..a check engine light
I have a 2007 Jeep Wrangler Unlimited Sahara with the 3.8L V6. I experienced a check engine light a week ago, but no codes read out using the on-off-on-off-on read the odometeter method. The code went… read more
Chad
Chad
Lead Auto Tech/Shop foreman
Associate Degree
858 satisfied customers
Jeep Wrangler unlimited: trouble code..oxygen sensor..o2 sensor
I have a trouble code of P0158 (heated oxygen sensor bank sensor 2) 2008 Jeep Wrangler Unlimited Sahara Replaced the rear passenger O2 sensor but engine light is still on. Did I replace the correct se… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
1998 Jeep Cherokee Sport: liter..sputter..Changed distributor..rotor
1998 Jeep Cherokee Sport 4 liter Inline 6 - Start jeep, after 2 minutes it begins to chug, sputter, strong fuel smell. Lasts 3-5 min. - Changed distributor, plugs, wires & rotor. Found magnetic pick u… read more
John
John
Vocational, Technical or Trade Scho
1,209 satisfied customers
2002 jeep wrangler: cuts..while driving down the road..park..ran fine
My 2002 jeep wrangler cuts out while driving down the road and also idles high when in park we have replaced the cam shaft sensor and the throttle position sensor any ideas? We have recently unplugged… read more
rpmdiag
rpmdiag
High school
7,741 satisfied customers
2006 wrangler unlimited rubicon: 4.0L..error code po171..is the fix
I have a 2006 wrangler unlimited rubicon 4.0L with a error code PO171 what is it and what is the fix...… read more
moparfl
moparfl
ASE Certified Technician
Vocational, Technical or Trade Scho
1,130 satisfied customers
2007 Jeep Wrangler unlimited: dealership..wiring..fuse box..sensors
I own A 2007 Jeep Wrangler unlimited 4 door. I am having problems with the fan motor staying on. I have taken it to the dealership quite a few times, have replaced all the wiring, fuse box panel, fan … read more
b5demon
b5demon
Automotive Technician
Vocational, Technical or Trade Scho
1,522 satisfied customers
Wrangler: cyl..50 miles per hour in 4th gear..rains
Why won't my 1998 4 cyl wrangler go over 50 miles per hour in 4th gear? It also has problems starting after it rains.… read more
supermechanic
supermechanic
Service consultant
Vocational, Technical or Trade Scho
10 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