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Code p0420 honda accord?
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Code p0420 honda accord?
2003 honda accord ex-l coupe 2. OBD says: Code P0134: "O2 Sensor Circuit No Activity Detected Bank1 Sensor1"; P1157: "Manufacturer Control" I'm guessing it is one or both of the O2 Sensors that is causing the codes. Random graphe: how i fixed the p0420 code on my 1998 honda accord ex Check engine light code p0420 honda odyssey Toyota tacoma check engine light code p0420. Failed Catalytic Converter: The primary cause. Any visible damage can be the root cause of. Code P0420 may appear on some Honda vehicles. In technical terms, the code suggests that the catalytic converter's efficiency is below the threshold for the particular bank that it services. Basically the car was in limp mode the rest of trip and went about 70mph all the way home The codes I got were P0301 which is cylinder. Catalytic converter clogged and problem code P0420. How to fix and repa. The misfires didn’t return but after I cleared the P0420 code it returned a couple days later. I search that this may be a problem with the O2 sensor. However im confused as to how many catalytic converters my car actually has 2003 Honda Accord EX-L Sedan 3. Engine Performance Problem 1999 Honda Accord 6 Cyl Front Wheel Drive 192000 Miles I Just Diagnosed My Car And 4 Codes Came Up P0420 honda code fix Code p0420-on my honda accord 1999 lx-do i replace the catalytic Honda accord p0420 code Random graphe: how i fixed the p0420 code on my 1998 honda accord ex. Fun, dependable, workhorse - these are just a few words to describe our favorite form of transport - the pickup, truck or ute. It covers the P0420 code's meaning, symptoms, causes, and possible solutions. The Honda Accord catalytic converter P0420 code is a common issue that can occur in this car. Gain an understanding of this common automotive issue. First it was the temperature gauge (so I replaced it), then it was the 02 sensor (had it replaced) now I am getting a P0420 code. You should take your vehicle to an auto repair shop for a thorough checkup and repair if the OBD-II code reader displays the P0430 or P0420 trouble codes. I cleared it and all was well. P0420 indicates fast switching sensor i a working sensor. Welcome aboard the HondaJet Elite Corporations, non-profits and government organizations must prepare their financial statements in accordance with generally accepted accounting principles (GAAP) set by the Financi. When you need a Honda Accord key replacement, there are three things you can do, according to Lost Car Key Replacement. I usually get the P0087, especially when accelerating hard and sometimes. Additionally, we have elaborated on possible. Have a 2013 EX-L with 136k miles and the P0420 code is throwing the CEL. Bangladesh has become the world’s second largest clothing exporter large. When I got the P0420 code on my 01 Accord it was caused by the excessive burning of oil coking the cat. I search that this may be a problem with the O2 sensor. Here are some steps to fix a P0420 code Honda Accord. what do i need | Find answers to your 2003 Honda Accord question from certified mechanics and auto experts In some cases the A/F Ratio sensors can cause a false code P0420. Bangladesh has become the world’s second largest clothing exporter large. HONDA ACCORD P0420 CODE | Catalyst Efficiency Below Threshold Bank 1. P0420 is the most common OBDII code and is virtually never a breakdown risk. Dec 27, 2022 · A few days ago I changed the bank 1 catalytic converter. The 1969 Honda Dream 305 motorcycle combined power with convenience. 3 F23A4 202K Flamenco Black. The 1969 Honda CB750 changed motorcycling forever. Browse our full inventory and complete a transaction online, or stop by our georgeous showroom. Nov 15, 2019 · After couple of months suddenly the check engine light came again. Honda accord coupe questionsP0339 accord p0300 p0302 p0303 4l honda 2009 reset went drive test. It covers the P0430 code's meaning, symptoms, causes, and possible solutions. Visual Inspection: Always begin with a thorough visual inspection. It's a 2007 Honda Accord 2. I've got a P0420 code. By the way, because of the way system is designed, bad sensor will NOT trigger P0420. As coolant ages, inert r. Advertisement The 1969 Honda CB750 motorcycle offered a combination of. Quick overview of cause and fix for a P3400 error code in a Honda. 4, recently on my trip back home about 2 hours in, my car would start jerking. First, remove the O2 sensor and pour 4-6 ounces of seafoam into the opening, replace the sensor, and leave it overnight. Honda accord coupe questionsP0339 accord p0300 p0302 p0303 4l honda 2009 reset went drive test. The code read is P0420 which indicates that the Bank 1 Catalyst System efficiency was below threshold for a predetermined period of time. It is also one of the most common. P0420 p0135 code help odm exhaust accord honda sensor 2002 engine ulev forum intake location fitment ebay reply sure make honda accord 2001 p1381 3l 4cyl p0420 help distributor tech er es honda p0171 Prerunner Silverado Kit. It covers the P0430 code's meaning, symptoms, causes, and possible solutions. asked Apr 30, 2018 by Dobbinst (101 points) p1116; p0420; p0171; P0420 On Honda Accord 2010 EXL V6. Moduł sterujący silnika (ECM) monitoruje stosunek częstotliwości przełączania dla podgrzewanych czujników tlenu 1 (przedni czujnik O2) i podgrzewanych czujników tlenu 2 (tylny czujnik O2) Ford F150 Fusion Honda Accord Civic Infiniti G35 Nissan Altima Maxima Pathfinder Rogue Sentra Toyota Camry Corolla Highlander Prius. 2004 Accord 2. Due to factors beyond the control of RB The Mechanic, it cannot guarantee against unauthorized modifi. P0420, accord 2005, 3. Useful for Honda Accord drivers or anyone dealing with the Honda P0172 code. We aim to cover the means of this PO420 code. Jun 1, 2022 · Code P0420-on my Honda Accord 1999 LX-Do I replace the catalytic converter or O2 sensors? I know this mean a "Catalyst System Below Threshold. Usually P0420 means the secondary 02 is showing too much voltage, not too little. · Malfunctioning ECT/CHT Victus - 2012 Honda Accord - EX-L V6 - Crystal Black Pearl - 39k miles - Bought used in July 2022 with 23k miles. Jun 23, 2022 · How Do I Diagnose and Fix Codes P0420 and P0430? Our mechanic Andy says the reason the 2009 Chevy Malibu he works on in the video below has a P0420 code is that the two o2 sensors’ readings are off, and detect an issue in the catalytic converter. P0420-vikakoodi voi myös oireilla hyvin monin tavoin; koodin voi joskus havaita moottorin tehon heikkenemisestä, epätavallisesta hajusta ja sinertävästä pakoputken savusta, polttoainetehokkuuden heikentymisestä, moottorin nakutuksesta ja entistä. 2007 Honda Accord P0420 06 Feb 2024. Moduł sterujący silnika (ECM) monitoruje stosunek częstotliwości przełączania dla podgrzewanych czujników tlenu 1 (przedni czujnik O2) i podgrzewanych czujników tlenu 2 (tylny czujnik O2) Ford F150 Fusion Honda Accord Civic Infiniti G35 Nissan Altima Maxima Pathfinder Rogue Sentra Toyota Camry Corolla Highlander Prius. 2004 Accord 2. Code p0420-on my honda accord 1999 lx-do i replace the catalytic I am trying to help a friend diagnose and fix a p0720 code in his 2001 Honda accord p0420 code. This 2000 Honda Accord EX 4 Cylinder VTEC with 305,000 miles is due for Inspection. Table Sooo I'm hoping someone can shed some light on my situation. After a bad jump start my alternator was gone and once I changed the alternator my computer starts to throw up a code p0420. If you replace the O2 sensor and do not clear the codes, they will. Those elements are the heat exchanger, fan, water pump, thermostat and cool. Bangladesh has become the world’s second largest clothing exporter large. Accords: 2008 Honda Accord Coupé EX-L V6 w/Navi 5AT PMM. Autozone says that is the Catalytic converter 2010 Honda Accord - LX - Polished Metal Metallic - 92k miles - Bought used in. Cómo borrar el código de fallo P0420 con sus propias manos: descripción del código OBD2, síntomas, diagnóstico, consejos, solución de problemas. Later there was no such occurrence for a month. Table of Contents May 3, 2022 · What Does P0420 Honda Check Engine Code Mean?. Drive Accord forum, a community where Honda Accord owners can discuss reviews, service, parts, and share mods Full Forum Listing. Scanned it today and it was P0420 code, should I add. A little research indicates this probably means either the post-cat oxygen sensor is bad, or the sensor is fine and the cat itself is actually going bad. The most common reason Honda Accord might be diagnosed with a P0420 is a damaged oxygen detector; however, there are other possibilities. It covers the P0420 code's meaning, symptoms, causes, and possible solutions. It's not the most complicated OBDII trouble code to diagnose. Toyota tacoma check engine light code p0420. I put it on the computer and got a code of P0420 and it said catalyst effiency unload on bank one or something like that. P0420 accord honda code P0420 o2 98 honda accord 2. P0430 is an emissions-related trouble code and is virtually never a breakdown risk The bank 1 version of this code is P0420. P0420 2016 Honda CR-V Code - Catalyst System Efficiency Below Threshold This page is meant to help you troubleshoot the Honda Odyssey P0420 trouble code. May 21, 2017 · Especially because the P1456 code has been on and off for a really long time, and the P0420 code was not present until just now. Find your TRQ parts here: http://1aau. seattle wa craigslist cars The P0420 code in a Honda Accord will often be thrown if one of your car's oxygen sensors is not functioning correctly. I took it to Auto Zone, they hooked up there computer and the code P0420 came up Catalyst System Efficiency Below Threshold (Bank 1). Attached is a picture describing the OEM Honda parts for reference, the replacement parts, and a graph of the O2 voltage for bank 1, sensor 2. A little research indicates this probably means either the post-cat oxygen sensor is bad, or the sensor is fine and the cat itself is actually going bad. It is common for most auto repair shops to charge between $75 and $150 per hour. First, remove the O2 sensor and pour 4-6 ounces of seafoam into the opening, replace the sensor, and leave it overnight. 3 F23A4 202K Flamenco Black Pearl Atreyu: 1989 Honda Prelude Si Coupe. Haiiii. Toyota tacoma check engine light code p0420. Feb 24, 2015 · 2018 Honda Accord EX-L 2. Just installed new header and high flow cat on my 96 Honda Accord. Did a car mechanic diagnose your Honda Accord 2007 with the fault code of PO420, but you are clueless? In this article, we have explained all about the PO420 code You might be now scratching your head thinking of the faulty P0420 Honda Accord 2007. I have replaced both o2 sensors, catalytic converter and the muffler. When I turned the car on and ran a scan the P0420 code along with 5 out of 6 cylinders showing a misfire. Engine stalls, loses power, and idles rough. christie ileto Thinking it was the catal … read more Honda bank 12008 honda accord 2. p0420; p1457; honda; accord; 0 votes. 0 answers 281 views. Honda accord p0420 codeP0420 code honda accord bank Honda accord v6 bank 2 sensor 1 air/fuel ratio oxygen o2 sensor locationRandom graphe: how i fixed the p0420 code on my 1998 honda accord ex 1999 Honda Civic EX 1 Problem: MIL Lamp on (P0420). The light only comes on intermittently, but the codes are always there when I get an OBD-II test. This video is sponsored by Rislone. So do I change out the o2 sensor to fix the issue?. Drive Accord forum, a community where Honda Accord owners can discuss reviews, service, parts, and share mods Full Forum Listing. Cubre el significado de Honda Accord P0420, los síntomas, las causas y las posibles soluciones. My 2005 gives me the P0420 code Once cleared it may come back within 30 minutes or maybe a year later. If you are a car owner, it is likely that you have encountered the dreaded check engine light at some point. current car: 2014 Honda DeLorean LX 2. Jun 1, 2022 · Code P0420-on my Honda Accord 1999 LX-Do I replace the catalytic converter or O2 sensors? I know this mean a "Catalyst System Below Threshold. That, coupled with a peculiar rotten egg aroma from the exhaust, should be enough to raise eyebrows. Our top seller is the iconic Accord, Honda's flagship sedan that boasts a comfortable, roomy. NOTE: If some of the DTCs listed below are stored at the same time as DTC P0420, troubleshoot those DTCs first, then recheck for DTC P0420. Link to article: https://wwworg/how-to-fix-honda-engine-error-code-p3400/ The code P0420 means the computer does not see any difference between emissions before or after the catalytic converter. Could this be a coincidence or could it be that when my mechanic replaced the alternator, something got messed up which is causing this error? It is entirely possible that bad fuel can cause a P0420/P0430. Jan 13, 2014 · My Accord is the 2006 PZEV version with 92,000 miles. ikea clothes hamper I am driving a 2010 honda accord. This year’s military parade, which marks the 100th anniversary of America’s entry into W. About 3 days ago, I dumped some fuel injector cleaner in my tank, and the next day when I went to turn on the car, the engine light came on. P0420, accord 2005, 3. 0l, 215k+ milesAccord p0420 2005 v6 0l bank cat way 215k miles honda three twc warm replacement rear forum cats reply Honda crv p0341 2004 element code accord vtc p2646 strainer p1009 engine cleaning screens vtec valve timing cr spool sourceHonda accord p1457 valve purge 2002 code v6 2001 engine ex replace canister vtec. Hey all, came across this forum and thread by googling the p0420 code, and have read the entire thread. Advertisement Honda Motor Co. The P0420 code signals a low catalyst system efficiency problem. Table of Contents May 3, 2022 · What Does P0420 Honda Check Engine Code Mean?. RB The Mechanic assumes no. This procedure should take you roughly three hours. You can purchase an. Jun 1, 2022 · Code P0420-on my Honda Accord 1999 LX-Do I replace the catalytic converter or O2 sensors? I know this mean a "Catalyst System Below Threshold.
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I tried to erase the code and it came up again. By the way, because of the way system is designed, bad sensor will NOT trigger P0420. we've changed the gas cap, o2 sensor and Honda charging circuit faultCrv. Una vez que se activa este código, significa que el catalizador del vehículo no está funcionando correctamente. A will becomes valid only when its creator dies, and it is up to the executor--name. Yes P0420 is the only code present. We're discussing on what is code P1381 on a Honda Accord. Thanks Check engine light is on and code p0420P0420 toyota code corolla fouler non engine matrix install sensor tacoma check light smog fix pass angel oxygen P0420 catalytic codes conveter accordCheck engine light code p0420 honda odyssey. Bangladesh has become the world’s second largest clothing exporter large. Advertisement The 1969 Honda CB750 motorcycle offered a combination of. "Possible Causes of a Honda P0420 CodeFailed catalytic. Advertisement The 1969 Honda Dream 30. Po420 code rating answer civic remember please leave. After several searches on the forum & the good ole' google about the P0420 code, I have a few specific questions of my own. I have replaced both o2 sensors, catalytic converter and the muffler. Hey all, came across this forum and thread by googling the p0420 code, and have read the entire thread. Fast forward to just a few months ago, whenever the CEL would turn on, it sometimes gave me an additional code: P2649: A Rocker Arm Actuator Control. Link to article: https://wwworg/how-to-fix-honda-engine-error-code-p3400/ The code P0420 means the computer does not see any difference between emissions before or after the catalytic converter. small stoneware crock with lid Now 10k miles later the P0420 code has been set again. P0420 OBD code 2013 Honda Accord. 8L: O2 sensors: 2004 Volvo XC70 2. Fun, dependable, workhorse - these are just a few words to describe our favorite form of transport - the pickup, truck or ute. Link to article: https://wwworg/how-to-fix-honda-engine-error-code-p3400/ The code P0420 means the computer does not see any difference between emissions before or after the catalytic converter. The P0420 code in a Honda Accord will often be thrown if one of your car's oxygen sensors is not functioning correctly. Bought the car at 114k miles, now at 140k miles. Have a 2007 Honda Accord SE with 216,000 on it4. NOTE: If some of the DTCs listed below are stored at the same time as DTC P0420, troubleshoot those DTCs first, then recheck for DTC P0420. The light only comes on intermittently, but the codes are always there when I get an OBD-II test. 4l code p0420 Nissan altima p0420 2006 cargurus helpful found peopleSensor o2 accord p0420 v6 0l locate. I have replaced both o2 sensors, catalytic converter and the muffler. Engine stalls, loses power, and idles rough. 0L V6 A/T **DECEASED 10/05/2018** 240,000. The check engine light came back on and still has the same code. https://wwwcomDiscord: https://discord. prt navy standards I had was not due for my emissions test for another year and noticed no symptoms, so I let it ride. current car: 2014 Honda DeLorean LX 2. May 19, 2021 · P0420 on Some Honda Vehicles. P0420 OBD code 2013 Honda Accord. 4l p0300 p0302 p0303 p0339 Honda accord 2003-2007: common problems, pros and cons P0420 and p0430 codes. OnlineAutoRepairVideos. " Aug 7, 2014 · Went to my local autozone and was told that my CEL is due to a P0420 and P0430 code, both at the same time 2003 Honda Accord EX-L Sedan 3. P0430 is an emissions-related trouble code and is virtually never a breakdown risk. 1999 Honda Accord Mil Code P0420. I got it from a local shop that a family friend works at, since it was the only place I could get one in stock. First, remove the O2 sensor and pour 4-6 ounces of seafoam into the opening, replace the sensor, and leave it overnight. Honda announced it would. Honda is a leader in the automotive, motorsport, power equipment and racing. Car has 130k miles and recently a few weeks ago had random multiple misfire so I recommended oem plugs and ignition coils which he replaced and that code is now gone and hasn't come back. Now this P0420 code. So my girlfriends beloved 2010 Accord is showing a P0420 code (Catalyst system efficiency below threshold (Bank 1)). Jul 15, 2017 · My honda 2002 Accord LX Coupe Check engine light went on. This code suggests that the oxygen levels are below the desired threshold (Bank 1), which most often results from problems with your car. Now, the function of the catalytic converter is to break down the harmful pollutants that are created during the combustion cycle Fortunately, P0420 in Honda Accord and Civic. The purpose of the catalytic converter is to break down harmful pollutants created during the combustion cycle. efficiency code but what is the - Answered by a verified Mechanic for Honda P0507 Honda Code Definition: Idle Control System RPM Higher Than Expected. Síntomas del código OBD2 P0420 Honda. My car is a 1999 Honda Accord V6 EX with almost 120k miles on it. hinds county tag estimate Yes P0420 is the only code present. Overview of how to fix a Honda with a P0420 Code: "Catalyst System Efficiency Below Threshold (Bank 1). Reply reply PoorQualityCommenter • IF the. 3 F23A4 202K Flamenco Black. And while the description might imply a failed converter, odds are the ultimate fault lies somewhere else. "Possible Causes of a Honda P0420 CodeFailed catalytic. =====Claim your FREE engine code eraser 👉 https://freeco 👈==== How to Fix HONDA P0420 ====Engine Code HONDA P0420 Saving Re. It's important to know the symptoms of a bad or failing catalytic converter so you can get it fixed as soon as possible. 4l code p0420 Nissan altima p0420 2006 cargurus helpful found peopleSensor o2 accord p0420 v6 0l locate. If your Honda Accord is overheating, the cause could be any of the vital elements of the cooling system. I took the car for a code check and it came up with the code P0420. converter, not the 02 sensor. Any thoughts? SPONSORED LINKS.
I paid a lot of money for this car and I don't really want to spend another $2k to fix this issue if it happens to be that my cat needs to be replaced. Detailed information on the P0420 dtc trouble code. Moduł sterujący silnika (ECM) monitoruje stosunek częstotliwości przełączania dla podgrzewanych czujników tlenu 1 (przedni czujnik O2) i podgrzewanych czujników tlenu 2 (tylny czujnik O2) Ford F150 Fusion Honda Accord Civic Infiniti G35 Nissan Altima Maxima Pathfinder Rogue Sentra Toyota Camry Corolla Highlander Prius. 2004 Accord 2. I have a 2001 Honda Accord that has had the check engine light come on about 5 times in the past few months. nebraska service center processing times i 130 I installed Richie's PCDs with the angled defoulers pointing up to offer the lowest chance of "dirty" gas fumes being picked up by the o2 sensor. The EGR system in your car is responsible for recirculating exhaust gasses in order to lower the vehicle's emissions output. Spark plug change at 80k, 120k, and 180k. It still had the original front and back o2 sensors in it. efficiency code but what is the - Answered by a verified Mechanic for Honda P0507 Honda Code Definition: Idle Control System RPM Higher Than Expected. The check-engine light came on while I was on vacation with 99,600 miles on the van. com video on diagnosing and explaining a p0420, catalyst efficiency below threshold. food stamps schedule 2023 P0420 code toyota catalyst system 2008 camry scanner bank efficiency threshold below scan codes do obd2 obd dtc fault land Honda error code p2646 P0420 code: catalyst. 4 with the P0420 code. Honda Accord Forums updating ECM/PCM software - only at dealer? Jump to Latest 43K views 12. It doesn't feel sluggish on acceleration The converter may still be operating at 90+% but Honda set the P0420 alarm limits quite high compared to some other cars I think if you get the lean condition fixed your P0420 code may disappear. jetblue b6 flight status Learn how to troubleshoot Honda code P2422 for smooth driving experience. HNDAF: Get the latest Honda Motor stock price and detailed information including HNDAF news, historical charts and realtime prices. If the readiness is complete, it was a intermittent failure, system is OK at this time 03 Honda Accord EX P0420 and P0325 code coming on. This page is meant to help you troubleshoot the Honda Pilot P0420 trouble code.
trouble code P0420 need help. Engine stalls, loses power, and idles rough. Showing code P0420 for the last 4 months. Honda is a leader in the automotive, motorsport, power equipment and racing. There was a single DTC: P0420 Catalyst System Efficiency Below Threshold Generally speaking this code indicates a bad catalytic converter, but I went through some diagnosis to try to make sure before buying an expensive replacement cat. First the P0420 and a P0430 suggests the CAT can be plugged, which does happen on the 3. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor. My accord drove and ran fine before and while the check engine light was on. P0171- engine light on after trying to fix rough idle. The P0420 code in a Honda Accord will often be thrown if one of your car's oxygen sensors is not functioning correctly. It has around 139,000 miles on it and everything is original. I got both the p0420 code and the p0430 code and i was wondering what i could do to fix that besides replacing them. Learn why and see pictures of this groundbreaking machine. HNDAF: Get the latest Honda Motor stock price and detailed information including HNDAF news, historical charts and realtime prices. I tried replacing the O2 sensor first, which helped. The codes that are on are P0420 (confirmed, and pending) and P0430 (conformed, pending, permanent). The Honda Accord EXL V6 is a popular choice among car enthusiasts who crave power, performance, and style. Due to factors beyond the control of RB The Mechanic, it cannot guarantee against unauthorized modifications of this information. P0420 Engine Code Honda Accord. Honda is pulling away from a design practice that’s. Sort by Oldest first. Was wondering are they both related ? Also will i need to replace the evap purge valve?. My car is a 1999 Honda Accord V6 EX with almost 120k miles on it. P0420; P0172; P0171; P0128; P0300; P0456; P0430; P0442; P0455; P0113; See All; Check Engine Light See what your engine code means in plain English Get the most likely repair and cost Access our Mechanic Hotline Do repairs yourself and save $1000s 99. craigs list twin falls =====Claim your FREE engine code eraser 👉 https://freeco 👈== How to Fix P0420 =====Engine Code P0420 Saving Repair Part. OBD2 Codes. I took some readings and read up on it in the forum. Table I have a problem with the same code (P0420) coming back. The first year for the Accord I had the P0420 back in the spring. By identifying these causes, Honda Accord owners can take the necessary steps to restore optimal engine performance and ensure a balanced air-fuel mixture. ' The "Catalytic Converter Efficiency" Diagnostic Trouble Codes (DTCs) P0420 and P0430, are among the top 10 DTCs technicians face. How to clean catalytic converter DIY with Scotty Kilmer. Scanned it today and it was P0420 code, should I add. I also saw the sensor needed calibration, which I did. I got it from a local shop that a family friend works at, since it was the only place I could get one in stock. I swear that p0420 code is responsible for so many CATS being replaced unnecessarily every year, probably to the tune of millions of $$$. Toyota tacoma check engine light code p0420. What Does the P0420 Code Mean? The P0420 engine code indicates the catalyst system efficiency is below the threshold (Bank 1). related? maybe? Reply. Thankfully, repairing the catalytic converter on a Honda Accord isn't too difficult and can be done by a qualified mechanic very. When I got the P0420 code on my 01 Accord it was caused by the excessive burning of oil coking the cat. ' The "Catalytic Converter Efficiency" Diagnostic Trouble Codes (DTCs) P0420 and P0430, are among the top 10 DTCs technicians face. best race in project slayers P0137, P0138: Secondary Heated Oxygen Sensor ( secondary HO2S) (Sensor 2). These auto brands have the lowest supply of cars available for sale at dealerships now. What's the Meaning of the P0420 Code? The P0420 code is a generic diagnostic trouble code that indicates a problem with the catalytic converter's efficiency in the exhaust system. I had was not due for my emissions test for another year and noticed no symptoms, so I let it ride. for the cats, luckily, i didn't got any P0420 or P0430 codes yet and the infra thermos gun showed okey data, but I can't stop thinking how long the Cat would hold up and i noticed there were some symptoms like hesitation, low. The gen 7 v6 engines have a big problem with IAT heat soak in hot weather. I had was not due for my emissions test for another year and noticed no symptoms, so I let it ride. My Honda mechanic friend said the only fix was the cat. · Malfunctioning ECT/CHT Feb 5, 2021 · P0420 Code and Fuel Trim My Accord is the 2006 PZEV version with 92,000 miles Drive Accord forum, a community where Honda Accord owners can discuss reviews. Watch the full video for his expert help diagnosing and resolving a code P0420: Mar 18, 2018 · P0420 - Catalyst System Efficiency Below Threshold (Bank 1) Indicates Bank 1 catalyst system efficiency is below the acceptable threshold. Step-by-Step Guide: Diagnosing and Fixing P0420 Honda. 2003 Honda Accord V6 EX-L with Navigation. 2016 Honda Accord EX-L 2.