Honda Odyssey Generation Forums. 1999 - 2004 Odyssey. P0420 (Catalyst System Below Threshold): one cause and solution. Jump to Latest Follow ... For a couple of years I struggled with the P0420 code, which would come and go. I replaced the sensor, no joy.First, check your oil level and make sure its correct. Low oil level can cause this P3400 code to set. A loose gas cap and/or dirty cabin air filter WILL NOT cause this P3400 code to set. The most obvious symptom was that the Odyssey was operating in 3 cylinder mode nearly ALL the time. There was a significant drop in power.1. Check Engine Light Illuminated. The most obvious and direct symptom associated with the P0420 code is the illumination of the "Check Engine" or "Service Engine Soon" light on your dashboard. 2. Reduced Fuel Efficiency. The catalytic converter plays a role in maintaining optimal engine performance.Related Honda Odyssey Honda Honda Cars and Motor Vehicles forward back. r/JeepPatriot. r/JeepPatriot. A place for Jeep Patriot owners to share photos and discuss their vehicles. Members Online. P0420 code advice upvotes · comments. r/AskMechanics. r/AskMechanics. Members Online. P0420 code HELP upvote ...Honda Odyssey Generation Forums. 1999 - 2004 Odyssey P0420 Code. 19620 Views 41 Replies 15 Participants ... Only show this user. 2000 EX 138k. The P0420 code has been on for nearly 1-year. I am about to have a cat installed, but wanted to check the forum first to see if there is anything else I need to address since it's gone ignored for so long.Apr 20, 2020 · Hey guys, I recently purchased my first Honda Odyssey! It's an 05 Touring model with 117k miles, the check engine light recently came on with a P0420 code. (Bank 1 catalyst system efficiency below threshold) I assume I need to replace the CAT, but wanted to check with you guys to see if you think anything else is needed.https://www.ktecgarage.comDiscord: https://discord.com/channels/1219270237908893779/1219270238420340777I will be using aftermarket direct fit parts from Dorm...Bolt - 2006 Honda Odyssey - EX - Ocean Mist Metallic - 110k miles - Bought brand new in August 2006, never any major repairs, possibly the most reliable Odyssey on the road ... I had a P0420 code in my old Subaru Forester. Tried the spacer method using a spark plug non-fouler which didn't work for me (but has worked for others). No pour in gas ...2000 HONDA ODYSSEY... showing codes p0300, p0302-306, p1739, p1399, p0420....ses light flashes. needing diagnostics - Answered by a verified Mechanic for Honda ... My 2001 Odyssey stop running , dashboard light up like a Christmas tree, engine turns over but wont catch. 11 codes flash. Po3oo thru 6, P1399, P0420, ect ...It's a long shot, but try adding 1 gallon of Lacquer Thinner to your slight less than 1/2 full gas tank... then drive about 100 miles with it... then clear the codes and see …Apr 19, 2010. Messages. 13,663. Location. Frisco, TX. Dec 4, 2013. #2. P0420 is "catalyst system efficiency below threshold". The ECU is comparing the pre- and post-catalyst O2 sensors, and is seeing the post-catalyst sensor not registering reduced emissions (slight oversimplification, but it gets the point across).Odyssey ALL ALL 2019 ALL 5FNRL6...KB000001 thru 5FNRL6...KB026674 2017-18 Pilot ALL ALL ... 20-100, Warranty Extension: MIL Comes On with DTC P0420/P0430, P030x, and/or P219A/B (With Software Update). SYMPTOM ... Code Symptom Code Template ID Failed Part Number 121110 Replace the fuelHow to diagnose code P0420 on a Honda Odyssey. Typically, you'll find out about P0420 because your malfunction indicator lamp or "check engine light" turned on & you or a mechanic diagnosed the problem with an OBD II code scanner like this one from Bluedriver. You may experience a very slight reduction in engine power from reduced exhaust flow ...Honda Odyssey Generation Forums. 2011 - 2017 Odyssey. Help please... 2014 Odyssey with P0420 & P2096 codes. Jump to Latest Follow ... The P0420 code really can't be used to confirm a bad cat until the O2 sensor is working properly.2012 Honda Odyssey EX-L. 108,270 Miles. Houston, TX. (but the majority of miles were in Southern CA and MA) I had a CEL, using my BlueDriver Bluetooth OBDII Scanner, I pulled Code P0420 - "Catalyst System Efficiency Below Threshold Bank 1" After reading a bunch of posts on this forum, the first suggestion seems to be to replace all 4 oxygen ...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.Codes P0172 and P0420. ... Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. Show Less . Full Forum Listing. Explore Our Forums. 2005 - 2010 Odyssey 2011 - 2017 Odyssey 1999 - 2004 Odyssey 2018+ Odyssey Problems and Concerns.Mar 21, 2023 · Here is the process I used: 1. Run gas tank down to less than 1/2 full - closer to 1/3 full. 2. Pour in an entire gallon of lacquer thinner. You can buy these at Lowe’s for $21. 3. Good on a road trip and run the engine without stopping until it is very low on gas.Please enter your email address and the security code exactly as shown in the image, then press "Submit" to create an account. ... HONDA: 2011: ODYSSEY: 3.5L V6: Loading. Loading. Loading. Loading.Customer brought me this 2001 Honda Odyssey to confirm if the Catalytic Converter was indeed bad, per Muffler Shop. In this Diagnosis I used three methods: S...Honda Odyssey Generation Forums. 1999 - 2004 Odyssey. Persistent P0420. 8725 Views ...Our 05 was popping a code for each cat off and on for the better part of a year before the code just wouldn't turn off again. Current Fleet: '14 VW Tiguan R-Line 2.0T CCTA; '13 VW Passat TDI SE 2.0T CKRA; '11 Honda Odyssey Touring Elite; '05.5 VW Jetta MKV 2.5; '97 Chev S10Common Reason: Code P0420 is often related to a bad catalytic converter. P0420 means the catalytic converter is not efficiently removing pollutants from the exhaust. Your car won't pass an emissions test. A bad catalytic converter isn't a hazard to the driver but it can overheat and destroy engine components.Code p0420 honda odyssey 2012 honda odyssey has the code p0980, has the d light flashing, it Subaru impreza engine p0420 engines car concept honda odyssey 2010 code auto cylinder 5l forester brings la show diagnostic used. How To Fix OBD Code P0420 On A Honda Odyssey - Car Tire Reviews.How to remove 2005Sensor location p0420 p0172 code o2 p0430 bank1 ridgeline locations honda sensor2 only 2008 rear mpg preventative maintenance located question P0430 code on 2010 honda pilotPersistant codes p0420 and p0430. 2008 honda odyssey touring P0430 code, bank 2 cat. Took out what I. Check DetailsWhen there is a large leak in the Honda Odyssey's EVAP system, it will throw the P0455 OBDII Code. P0455 indicates a large leak in the evaporative emission control system. (EVAP). There are different leak size codes. For example, P0456 means your Odyssey has a small EVAP leak. While the trouble code may state that there is a "large leak ...Getting an error code P0420 on my honda odyssey 2005 ex-l. Check for a clogged or damaged catalytic connector. Need help - Answered by a verified Auto MechanicHonda Odyssey is a popular choice among many minivan buyers but has technical errors! What Causes Errors on the Honda Odyssey? A weak battery. If your Honda Odyssey won't start or cranks slower than usual, the problem is a weak or dead battery. A battery voltage test will verify the problem.Honda Odyssey P1456: EVAP Leakage (Fuel Tank) P1456 is a very common trouble code in vehicles made by Honda. It is a Honda specific code, which means that it has the same meaning in any vehicle manufactured by Honda (including Acura). P1456 is typically caused by a faulty or loose gas cap, although there are other issues that can cause it as well.460 posts · Joined 2005. #1 · Nov 7, 2008. At least I hope! The symptoms were the P0420 code on our 1999 Odyssey. I would read the code and then erase it with the code reader. This started a couple years ago and it would take a while (hundreds of miles) for the code to show up again. But more recently the code would show up within minutes ...2000 Odyssey with P0420 code & nothing else! Save Share. Like. 1 1 of 6 Go to page. Go. 6. ... Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. Show Less . Full Forum Listing. Explore Our Forums.P0420 Code in Honda. This is typically associated with a faulty catalytic converter, oxygen sensors, or an exhaust leak. Some of the most common solutions include replacing the catalytic converter or oxygen sensors, or addressing the exhaust leak. Regular servicing to diagnose these problems early can prevent this code from reappearing.#1 · Feb 8, 2009. Anybody know what this is as i am getting confusing diagnostic advice as to what this is , some say cat and some say 02 sensor. Code is P0420 catlatic system …The P0420 code in Ford Focus specifically relates to the Bank 1 catalytic converter, which is the one located before the engine's cylinder head. ... Introducing the Honda Odyssey A123: Unleashing Power and Performance in a Family-Friendly Package. The Honda Odyssey A123 combines the best Read more. Decoding 2007 Honda Accord AC: Unveiling ...P0420 honda code fix P0369 code Persistant codes p0420 and p0430. Odyssey p0420. Honda odyssey 439b 9c19 a26cHonda pilot p0420 code Subaru impreza engine p0420 engines honda car odyssey code 2010 concept cylinder auto 5l forester brings la show diagnostic nowNeed help troubleshooting 2005 honda odyssey codes p0171/p0174 and p0420..Code P0420 Honda Catalyst System Efficiency Below Threshold (With Video) AutoCodes - Honda - P0420 Honda. P0420 Honda Code - Catalyst System …Odyssey ALL ALL 2019 ALL 5FNRL6...KB000001 thru 5FNRL6...KB026674 2017-18 Pilot ALL ALL ... 20-100, Warranty Extension: MIL Comes On with DTC P0420/P0430, P030x, and/or P219A/B (With Software Update). SYMPTOM ... Code Symptom Code Template ID Failed Part Number 121110 Replace the fuelP0420 Honda Odyssey - 0 votes . ... Reset ECM to erase Code P0420, engine light came back on after driving 75 miles and stayed on. What may be causing this? Vehicle: 2001, Honda Odyssey 3.5 check-engine-light-on; p0420; 1 Answer. 0 votes . answered Jul 30, 2017 by anonymous. P0420 is for the catalytic converter not cleaning …I've had other aged cars throw similar evap codes (especially in sub zero F conditions) and I would clear them and they would often come back, but when spring rolled around they would go away. ... Past - 2012 Toyota Sienna Base-Gray, 2007 Honda Odyssey Touring-Silver, 2010 Acura MDX, 2006 Subaru Legacy GT, 2001 Toyota …SOURCE: Question regarding a honda odyssey 1999 check engine light codes. Ramon P0420 relates to the catalytic converter. The computer sees little or no improvement in the exhaust before and after going through the converter.August 14, 2023 by Jason. P0507 is a fairly typical OBDII trouble code that can occur in the Honda Odyssey. It is typically triggered when the engine idle speed is 200 rpm or more over the predetermined limit set by the Honda. It is a generic code, which means that it has the same meaning for the Honda Odyssey as any other vehicle.Oct 19, 2019 · 2007 Honda Odyssey EX-L P0420 Code. Catalyst Efficiency BelowThreshold (Bank 1). The mileage of my van is 200,000. When they check the code they need to replace the o2 sensor. Then I've tried a second opinion from AutoZone and they advice me to replace Catalytic Converter (s) with new OE Catalytic Converter (s).P0420 and P0430 codes. ... Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more.Honda Odyssey Generation Forums. 1999 - 2004 Odyssey. solution to CEL P1457. Jump to Latest Follow 5K ... Exactly a year ago the odyssey had driven me crazy with p0420 codes popping up for a year about every 4 to 6 weeks. I decided to try Seafoam and carb cleaning--can't remember where but somebody recommended it.Inspect the catalytic converter: Look for any physical damage or clogging in the catalytic converter. A failing converter can trigger the P0420 code. 4. Check for engine misfires: Misfires can cause unburnt fuel to enter the exhaust system, which can damage the catalytic converter.7371 posts · Joined 2020. #2 · Jan 7, 2024. DTC P0420 Rear Bank Catalyst System Efficiency Below Threshold (Bank 1) if your VCM is still active, suggest you read the VCM megathread. Shaque-ymm.MIL came on recently. DTC pulled was "P3400". There was a problem with the oil pressure sensor on the rocker arm. Fairly common issue. Before replacing the sensor- CHECK OIL LEVEL... Low oil will throw this code also. More info - Switching It Up! Honda Oil |Pressure Switch Issues - ALLDATA. Part is $20-30.P0420 Code Help. Tags 2008 accord 8th gen check engine light maintenance. Jump to Latest Follow ... Bolt - 2006 Honda Odyssey - EX - Ocean Mist Metallic - 110k miles - Bought brand new in August 2006, never any major repairs, possibly the most reliable Odyssey on the roadThe the P0420 test is very sensitive on many makes/models and will kick out a code quite easily. Note that any exhaust leak between from the exhaust manifold gaskets to the new cat gasket can cause O2 to be introduced into the exhaust stream causing the a P0420.Honda Odyssey Generation Forums. 1999 - 2004 Odyssey Check Engine Codes P0420 and P0740. Jump to Latest ... The P0420 code was noted in the repair documentation so if it happens again it should be covered under the 12/12k waranty of the EGR repair in November. At least that's what the service guy told me.Funny thing is when you get a P0420 or P0430 the code does not tell you which sensor it is since there are two on each bank. Which does not make sense it only tells you the bank. Since I already changed the lower sensor nearest the rear of vehicle on the bottom which I assume bank 1, I guess I'll change the top on bank 1 now.= no P0420 code. Given the van is ~8rys old and over 100Kmi, new O2 sensors wouldn't hurt anyway. Joel . 2008 Honda Ody LX babe magnet. ... 2002 Odyssey EX Fern (Granite) Green Honda hood protector, stainless steel flex brake lines, Honda block heater, AC condenser screen, Zymol waxIf the P0430 code is combined with other codes, try fixing the other codes first. There is a factory service bulletin (A17-036) for the following Honda models: - 2016-2017 Honda Pilot - 2018 Honda Odyssey - 2017 Honda Ridgeline The Powertrain Control Module (PCM) software may misinterpret sensor inputs as a deteriorated catalytic converter.It should the 2 up-stream O2sensors at the same timeThe following is from the Honda Odyssey (1999-2004) Service Manual page 19-81: "When the Malfunction Indicator Light (MIL or check engine light) and the Traction Control System (TCS) light are both on at the same time, you should troubleshoot the Programmed Fuel Injection (PGM-FI) system first."May 9, 2018 · 4/2/18: OBD2 - confirmed: P0420 - Catalyst System Efficiency Below Threshold Bank 1 & P2096 - Post Catalyst Fuel Trim System Too Lean Bank 1. OBD2 - pending: P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) & P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1. OBD2 - permanent: P0420 - Catalyst System ...Past 200k miles does seem about the time these codes (P0420, P0430) start to show up on Odysseys. If I were you, I'd start off by buying your own code reader, reset the code, and keep track of how frequently it comes back. ... 2002 Odyssey EX Fern (Granite) Green Honda hood protector, stainless steel flex brake lines, Honda block heater, AC ...The P0420 code is a common issue many Honda Odyssey owners may encounter. This diagnostic trouble code (DTC) signifies that the vehicle's computer has detected an efficiency problem with the catalytic converter's performance, specifically that the catalyst system's efficiency is below the threshold for the bank 1.HELP! | Honda Odyssey Forum. 2000 Odyssey P420 code? HELP! 2000 Odyssey 60,000 is getting a P420. 1st the check engine light can on then went of after a week or so. I thought it had to due with the fuel cap. Then after a few days it came back on. Now my wife calls and says it is flashing maint required. She take it to a Midas dealer to have ...The P0420 code is a common issue faced by Honda Fit owners. This subheading will aim to provide a comprehensive understanding of what the code means and its implications. Answer: The P0420 code in the Honda Fit is related to the vehicle's catalytic converter efficiency. It indicates that the catalytic converter is not functioning efficiently ...https://www.ktecgarage.comDiscord: https://discord.com/channels/1219270237908893779/1219270238420340777I will be using aftermarket direct fit parts from Dorm...-loss of 1-2 mpg when the P0420 or P0421 code was present-new upstream and downstream O2 sensors didn't appear to help much-EGR code P0401 eventually came up after having the simulator installed for about a month or 2 on my Odyssey. I used the TSB procedure to clean the EGR ports on the intake manifold as well as cleaning the …My conclusion is that the code retrieved from the computer is not a true code. p0420 is not always Catalytic Converter but a related issue. It has something to do with emission. Since after market Catlytic converter do not work on this model, CEL will come back on, it is good to spend $12 and try this solution before forking out $1100 to the dealer.Even slight variations in the air/fuel mixture will cause the converter temperature to rise significantly. The “Catalytic Converter Efficiency” Diagnostic Trouble Codes (DTCs) P0420 and P0430, are among the top 10 DTCs technicians face. And while the description might imply a failed converter, odds are the ultimate fault lies somewhere …Good chance at this mileage that oil blow by from VCM has damaged your catalytic convertor. It may be worth just replace the O2 sensor down there, but decent chance your cat is shot.For the past 6 months, the CEL intermittent gets on and off, throwing out a P0420 code. Recently, it starts throwing P0430 along with P0420. I am also reading from the freeze frame data for the P0420 code using a low-end OBD2 reader: SHRTFT1: 100.8% (Short term fuel trim bank 1?) ... 2006 Honda Odyssey EX-L, 310K Km 2005 Honda Odyssey EX-L ...Here is the process I used: 1. Run gas tank down to less than 1/2 full - closer to 1/3 full. 2. Pour in an entire gallon of lacquer thinner. You can buy these at Lowe’s for $21. 3. Good on a road trip and run the engine without stopping until it is very low on gas.P0420 engine diagnostic code for 2011 honda odyssey Need help troubleshooting 2005 honda odyssey codes p0171/p0174 and p0420. (honda odyssey) diagnosing a p0420 by using 3 methods P0420 fix .Good chance at this mileage that oil blow by from VCM has damaged your catalytic convertor. It may be worth just replace the O2 sensor down there, but decent chance your cat is shot.2000 Odyssey with P0420 code & nothing else! Save Share. Like. 1 1 of 6 Go to page. Go. 6. ... Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. Show Less . Full Forum Listing. Explore Our Forums.The P0420 code is set by the downstream O2 sensor. I had the same code and replaced both O2 sensors. Code came back. ... Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. Show Less . Full Forum Listing.Aug 18, 2023 · If the P0420 code is combined with other codes, try addressing the other codes first There is a Factory Service Bulletin for the following Honda models: 2003–2005 Honda Civic Hybrid ULEV (KA) 2002–2006 Honda Insight With M/T Honda Civic, Insight Factory Service Bulletin OBDII Code P0420p0400 and p0420 together on a Honda odyssey, not the cat . My parents have 2008 Honda odyssey that is throwing po400 and po420 with a awful eye watering smell and struggles to get into the last gear around 45 mph, and I'm not sure want is wrong with it. ... Code P0420 on Citroën C3 2018 (2019 first use). Is this normal on such a young car?The P0420 code indicates that the Engine Control Module (ECM) has identified a decline in the efficiency of the catalytic converter on Bank 1. This could be attributed to a malfunctioning catalyst or potentially …Customer brought me this 2001 Honda Odyssey to confirm if the Catalytic Converter was indeed bad, per Muffler Shop. In this Diagnosis I used three methods: S...My conclusion is that the code retrieved from the computer is not a true code. p0420 is not always Catalytic Converter but a related issue. It has something to do with emission. Since after market Catlytic converter do not work on this model, CEL will come back on, it is good to spend $12 and try this solution before forking out $1100 to the ...The meaning of the P0420 code on a Honda Accord is a “Catalyst System Efficiency Below Threshold (Bank 1).”. This code indicates that there is a potential issue with the catalytic converter in the exhaust system. It is important to have this issue addressed by a qualified mechanic as it can affect the vehicle’s emissions and overall ...Jan 14, 2024 · Inspect the catalytic converter: Look for any physical damage or clogging in the catalytic converter. A failing converter can trigger the P0420 code. 4. Check for engine misfires: Misfires can cause unburnt fuel to enter the exhaust system, which can damage the catalytic converter.Honda Odyssey Generation Forums. 1999 - 2004 Odyssey. Can the Catalytic code P0420 be overridden permanently? ... My luck with chevron techron in clearing up the P0420 code seems to have ended - that was good 5 years. I dose my gas tank 2X and still got the CEL right back. First dose was a full tank (20 oz.) and it took about 250 miles before ...The meaning of the P0420 code on a Honda Accord is a "Catalyst System Efficiency Below Threshold (Bank 1).". This code indicates that there is a potential issue with the catalytic converter in the exhaust system. It is important to have this issue addressed by a qualified mechanic as it can affect the vehicle's emissions and overall ...2WD. AUTOMATIC. 204,500 MILES. My minivan shakes when on the freeway going over fifty mph. If I take foot off the accelerator the shaking/vibration stops and engine runs smoothly. The car has not had a tune up anytime recent. Regular oil changes done at four to five thousand miles. Check engine light is on with code P0420 - Catalyst system ...Honda Odyssey Ownership. Problems and Concerns. P0420 Engine Code. Jump to Lates, The following is from the Honda Odyssey (1999-2004) Service Manual page 19-81: "When the Malfun, A logged P0463 code means that a high voltage signal is detected from the , Honda odyssey catalytic converter Catalytic odyssey w, Honda Odyssey Generation Forums. 1999 - 2004 Odyssey. P, Videos are for Knowledge & Entertainment purpo, Videos are for Knowledge & Entertainment purposes only. Due to factors beyond the control of RB The Mechanic, it can, Honda odyssey 2003 P0720 code (1/2) - EricTheCarGuy - EricTh, If the P0430 code is combined with other codes, try fixing t, Check Engine Light and P0420 and P0430 Codes. So, your C, i have a 2017 honda odyssey and have replaced both oil pressure, Wyoming and Montana have the most Superchargers per 1 Million Peo, Diagnostic trouble code(DTC) P0420 stands for “P0420 Catalyst S, MIL came on recently. DTC pulled was "P3400". , MIL came on recently. DTC pulled was "P3400". There was a , Summary. The P3497 code stands for "Cylinder Deacti, Honda Odyssey Generation Forums. 2018+ Odyssey. 2018 Honda Od, The limits are set so tightly by the ECU that even small variation.