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A discussion thread about the possible causes and solutions for the check engine light code P0420 in a 2013 Honda Accord LX. Users share their experiences, opinions and advice on the catalytic converter, oxygen sensors and emissions system issues.90K views 3 years ago. JOIN GASDIESEL GARAGE AS WE DIAGNOSE AND REPAIR THE MOST COMMON CHECK ENGINE LIGHT TROUBLE CODE P0420 Catalyst Efficiency Below Threshold Bank 1 SENSOR 2 ON 2.4L ENGINE BUT...104 posts · Joined 2013. #1 · Nov 27, 2015. i have a 2007 honda accord lx 4cyl sedan. last august while driving from new York city to Pennsylvania {i-80} i got a check engine code of p0420. i cleared the code when i got back home and the code never popped up . i thought it was a fluke and forgot about it.Go to Honda r/Honda • by ... P0420 (2012 Accord 2.4) I bought a used 2012 Accord 2.4 last February. The old owner said that the cat con on it was missing (since it was in California), and because of that the check engine light could come on at times. The state where I live waives emissions tests, so, I decided it wasn’t a big deal.Accord P0420 Troubleshoot Help . Hi all, I have a 2012 Honda Accord 3.5L v6 with 118,000 miles. Over the past year the check engine light has been coming on. When I read the code it's the P0420, bank 1 catalytic converter below operating efficiency. The cars been been driving fine, just as powerful as the day I bought it about 3 years ago.Honda Accord P0420 OBDII Meaning. P0420 is a failure code from the OBDII system. The code is short for Catalyst System Efficiency Below Threshold. In every Accord, at least two oxygen sensors are installed, both about the back and front of the exhaust system regardless of mode. One of the primary responsibilities of oxygen sensors is to detect ...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. Selene: 1999 Honda Accord LX Sedan 2.3 F23A4 202K Flamenco Black Pearl Atreyu: 1989 Honda Prelude Si Coupe 2.0 B20A5 4WS 112k Granada Black Pearl Artax: 1986 Chevrolet Cavalier Z24 2.8 60° V6 126k White Silvio: 1998 ...Jan 19, 2024 · Fuel Delivery Issues: Problems with the fuel pump, fuel injectors, or fuel pressure regulator can result in insufficient fuel reaching the combustion chamber. 4. Exhaust System Leaks: Leaks in the exhaust system before the oxygen sensors can cause false readings and trigger the P0171 code. 5. Dirty or Clogged Fuel Injectors: Accumulated dirt ...greg1c. 5852 posts · Joined 2013. #10 · Mar 25, 2017. Here is the bottom line, Catalytic convertors do not wear out, they are destroyed by oil, coolant, lead, phosphorus, silicone, and bad fuel mixtures. So this P0420 code says that the bank 1 catalytic converter is under efficiency threshold.ElPigto Discussion starter. 25 posts · Joined 2008. #1 · Dec 15, 2009. My CEL just came on today. I took it to advance auto parts and they told me I have P0420 Code (Catalyst efficiency below threshold bank 1). My car is a 1999 Honda Accord V6 EX with almost 120k miles on it. I always pump gas at either Shell, Exxon or Texaco (mostly …May 19, 2021 · P0420 on Some Honda Vehicles. Code P0420 may appear on some Honda vehicles. On a 2013 Honda Accord LX 2.4L, for example, the code appears because of the following conditions: WU-TWC deterioration; Secondary HO2S (sensor 2) line electrical noise overlapped; Secondary HO2S (sensor 2) connector loose connection; Exhaust system change (besides a ...Unfortunately, the sensors will not cause a P0420 and P0430. Those codes are set when the sensors are working properly and detect an issue within the catalytic converter. There is an extremely slim chance that an exhaust leak could cause the code, but you'd have to have an exhaust leak on both sides of the engine and it would be very obvious.For MORE great Auto Repair Videos, visit us at www.OnlineAutoRepairVideos.com video on diagnosing and explaining a p0420, catalyst efficiency below threshold...Jul 15, 2017 · 2. Posted: Jul 15, 2017. Options. As stated, it could be a leak in your exhaust, a faulty oxygen sensor, or most likely a filthy catalytic converter. If your catalytic converter is loaded with residue and build-up, it will hamper its ability to convert raw smog into a much cleaner exhaust. Taking it off and cleaning it yourself isn’t ...P0420 code 2001 honda Accord 2.4 was created by chris.canty. I recently bought a 01 honda Accord with a p0420 code dianosed the cat will replace soon on the scan tool the rear 02 sensor is mirroring the front and I have a short term fuel trim of -22 the long term stays around -7 could a bad fuel pump cause this waiting on a fuel guage in the ...Honda is creating a dedicated EV division for the first time, as it attempts to catch up to its rivals in electrification of its lineup. Honda is establishing a division dedicated ...The P0420 engine code indicates the catalyst system efficiency is below the threshold (Bank 1). A P0420 code indicates a problem with the catalytic converter, more specifically. The purpose of the catalytic converter is to break down harmful pollutants created during the combustion cycle. By using fine platinum and gold meshes to filter exhaust ...This 2000 Honda Accord EX 4 Cylinder VTEC with 305,000 miles is due for Inspection. But there are 4 diagnostic trouble codes setting off the dreaded Check En...Honda accord p0420 code. Honda p0420 accord 1998 code exHow to fix code p0420 or lack of acceleration on honda cr-v and other Honda 2005 accord 2000 cars colors ratings 2004 2003 2009 civic 2008 2010 unlock vehicle change front.. Check Details. Check Details. Random Graphe: How I fixed the P0420 code on my 1998 Honda Accord EX. Check Details ...Mar 17, 2020 ... I have a 2013 Honda Odyssey with 127K miles that recently got a check emission light that came on. I checked the code and only got a ...Some possible causes for code P0420 in a Honda Accord include: 1. Faulty oxygen sensor: A malfunctioning oxygen sensor can provide inaccurate readings, leading to the P0420 code. 2. Catalytic converter issues: A failing or damaged catalytic converter may not be able to efficiently reduce emissions, triggering the code. 3.

I've heard of O2 sensors fixing P0420 on Hondas too. It's the logical first step. The Fleet: Victus - 2012 Honda Accord - EX-L V6 - Crystal Black Pearl - 37k miles - Bought used in July 2022 with 23k miles. Bolt - 2006 Honda Odyssey - EX - Ocean Mist Metallic - 110k miles - Bought brand new in August 2006, never any major repairs, …Honda Accord P0496 Meaning. P0496 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing. The code technically stands for: Evaporative Emission System High Purge Flow. The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in ...I shortened OCI from the maintenance minder recommendation to 7,500 right away and then to 5,000 miles for the past 10 or so years. About a week after I did my first OCI using Valvoline 0w20 Protect and Restore oil, I got a P0420 code for catalytic converter low system efficiency. I checked my oil and found that it had gone completely dark, so ...Have a 2007 Honda Accord SE with 216,000 on it. It has the 2.4. Last week the light came on so I read the codes and got the two in the title. It still had the original front and back o2 sensors in it. I purchased a NTK for the rear and installed it. The p0139 code went away but the dreaded p0420 still is there and after I erase the code it will ...

2006 honda accord 4 cylinder and i had code po420 and i was told to replace the catalytic converter- there were no - Answered by a verified Mechanic for Honda ... Second opinion] I have a 2007 honda accord 4 cylinder, ok so I have got my code which is P0420 an was told to replace my catalytic converter and the S2 sensor, ...P0420 code. Bought my 2013 I4 coupe last month with 120k miles on it, currently went over 121k miles recently. Passed NJ inspection last Friday and the p0420 code came on last night. Car drove fine all day until last night where it felt sluggish and didn’t want to accelerate.360 posts · Joined 2012. #1 · Sep 22, 2019. Jan. 10/2018: Check engine light = P0420. The shop assessed it to be catalytic converter, replaced with new direct fit cat.converter. O2 sensors deemed fine by shop. Sept. 22/2019: Check engine light comes on today. I used a bluetooth device (Veepeak OBD 2) and found P0420.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Hi, I have a 2003 Honda Accord V6 coupe. I've h. Possible cause: 2004 Accord 2.4 175k P0420 code came back on after replacing sensor 1 and.