Po420 kia soul

Uh oh, it's the dreaded P0420 (or P0430)… This Ford Taurus gave me the opportunity to discuss catalytic converter testing, as well as a chance to demonstrate...

Po420 kia soul. 2014 1.6 base soul P0420 and a vacuum leak I can’t find. I reset the p0420 code a couple of times and it would stay away for a couple of weeks. Now it comes on a day later. I had the cat recall software update done at 90k miles so the overheating damage wore it out enough before they could recall it. At 130k now and the light keeps coming on.

The P0420 code is quite famous, and can typically take weeks or months for it to reappear. It's a sign of something causing a problem with the catalytic converter, or at least the rear O2 sensor detecting something wrong. If you reset it, the dealer won't do squat without the light on. ... Kia Soul 2015 2.0 litre EX GDI Alien Green II Pearl ...

The 2021 Kia Soul is available in six trim Levels: LX, X-Line, GT-Line, S, EX and Turbo. For most of the lineup, you get a 2.0-liter four-cylinder engine (147 horsepower, 132 lb-ft of torque).So I threw a p0420 code the other day and find out it's related to the cat or o2 sensor. I cleared the code in hopes of it being a flute. ... Also have a 16 Kia Soul, but again, can't find the files I keep on it at 315 am. ... OptimaForums.com is an independent Kia enthusiast website owned and operated by VerticalScope Inc. Content on ...Kia Soul Exhaust Manifold Catalytic Assembly. Part Number: 285102EJM0. Vehicle Specific. $2802.62 MSRP: $3958.50. You Save: $ 1155.88 ( 30%) Check the fit. Add to Cart. Product Specifications. Other Name: Manifold Catalytic A; …2014 kia soul 10400.miles cat went out 6month after Bought it and dealer wouldn't replace cat and engine was burning oil bad still wouldn't do anything they kept say couldn't find any thing wrong with engine was under warranty year and half later and 2 cat systems after market, engine finally blew up dealer replaced engine but not cat systemsSome of us run toward the light, while others are drawn to the shadows, not shying away from the darker side of life. Which are you? Advertisement Advertisement Some people think b...18 kia soul + P0335 code. Jump to Latest Follow. 918 views 2 replies 3 participants last post by 56chuzz May 19, 2023. wthobgood Discussion starter. 1 post · Joined 2022. #1 · May 18, 2023. Looking for an snswer on a fix for this, have peplaced both cam sensor A and B replaced and a 02 sensor replaced, still getting P0335 showing.New Listing For Kia Soul 1.6L Both Manifold & REAR Catalytic Converters 2012-2019 NEW (Fits: 2015 Kia Soul) Brand New: Unbranded. $143.00. or Best Offer. Free shipping. Fits 2012-2016 Kia Soul 2.0L 2011-2016 Hyundai Elantra 1.8L Catalytic Converter (Fits: 2015 Kia Soul) Brand New: Unbranded.

P0420 is a catalytic converter insufficiency code. What can trigger the cel. An Oxygen sensor fault , worn cat , maf issue , etc , You run certain test to pinpoint the issue. An inexpensive code reader with live data , can be use to look at certain pids of info to help pinpoint your diagnosis. waddy. Like.Most all manufacturers struggle with some issues. Yeah, Kia seems to have had a rough time. My lady's Soul has almost doubled the 100,000 blow-up timer, though. Other than the p0420, and slight oil consumption (I had a Celica with the 1zzfe, talk about oil consumption!), the car seems solid, looks good, rides nice.I had an appointment today with my OB/GYN. (Nope, not pregnant — I'm well beyond child-bearing years.) With me in the waiting room sat a couple — ​clearly eager first time par...Jan 17, 2023 · I believe the key thing to look at for a P0420 code is the downstream O2, or bank 1 sensor 2 B1S2. 2016 Kia Soul ! Save Share. Like. G. geraldine. ... Kia Soul Owners. Kia Codes; Trouble Code Fault Location Probable Cause; P0404: Exhaust Gas Recirculation Circuit Range/Performance: Wiring, EGR valve, PCM: P0406: Exhaust Gas Recirculation Sensor "A" Circuit High: EGR valve, position sensor: P1000 - P1099 (Fuel and air metering and auxiliary emission control)704. 123K views 2 years ago. HYUNDAI KIA CODE P0420 CATALYTIC CONVERTER FIX, ENGINE LIGHT ON If you have Hyundai or Kia and you have engine …

How to fix you emissions p0420 code for cheap, easy, fast. Watch this video and learn how to turn off you cars check engine in under 10 minutes with parts av...=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code KIA P0455 Saving Repair ...What Does the P0420 Code Mean? Diagnostic trouble code (DTC) P0420 stands for “P0420 Catalyst System Efficiency Below Threshold (Bank 1).” It indicates …Expand user menu Open settings menu. Log In / Sign UpIt certainly wasn't clogged, the honeycomb looked good, seemed to have good airflow, but it didn't resolve the p0420 issue. Since then I've changed the spark plugs with the preferred NGKs, factory gaps (double-checked) as well as the air filter. I used about a half-can of CRC Industries Intake valve cleaner directly in the throttle body, spray ...I have a 2010 kia soul. And am having problems with the engine cutting out, rough idle, have replaced nearly all the sensors and fuel filters, fuel filter checked no issues, fuel pressure showing fine when revving, thought had fixed the problem and then again the car cut out as I went to get on the motorway, any one with any ideas greatly appreciated

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I have a 2014 Soul with 108,000 miles. Today the check engine light came on. Took it to AutoZone, their reader said bad catalytic converter. I bought a bottle of Cataclean, put it in tank, and after about 20 miles driven the check engine light went off.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...When your Kia Soul’s oxygen sensor(s) are not working correctly, it can disrupt the optimal 14.7:1 air-fuel mixture, which can negatively impact your gas mileage.. Since the oxygen sensor plays a key role in maintaining the efficiency of the combustion process, a bad sensor can result in poor fuel economy.If you notice a significant drop in …The brand's iconic "Jumpman" logo is at stake, as well as it's reputation as an innovator. Nike is currently embroiled in three legal struggles, one over copyright and two over int...2015 Kia soul 2.0 codes p0191 and p0192 P0441 and p0420 Car runs rough on cold start and get better as it warms up. Can - Answered by a verified Kia Mechanic ... I can definitely help diagnose the issues with your 2015 Kia Soul, including the rough cold start and the codes P0191, P0192, P0441, and P0420. Let's get started and figure out what's ...

The P0420 code on a Kia Forte typically indicates a problem with the catalytic converter or mass airflow sensor. This is an important emissions control component that is designed to reduce harmful emissions from the vehicle's exhaust system. ... Reset Check Engine Light Kia Soul. 25. April 2023. Kia Soul Check Engine Light Codes. 24. April ...In this video, you'll learn the causes and solutions of the P0420 code. The causes of the P0420 code are a bad catalytic converter, an ECM update, an exhaust...After that the P0420 code came on, followed closely by the P0336. ... Come discuss the Kia Sorento, Rio, Sportage, Soul and more! Show Less . Full Forum Listing. Explore Our Forums. 2011 - 2013 (XM) Sorento Forum 2016 - 2020 Sorento Forum 2003-2010 Sorento Forum 3G 2011 - 2016 Sportage Kia Cee'd Forum.I just got this code on my 2019 Soul. My little inexpensive Autel AP200 showed no codes on the Kia side, it didn't even see my 2019, so I had to say it was a 2018, but when I went into obd2 side it showed P04E0 current, pending and permanent. I'm about to load the parts cannon! 😳 But maybe this is still covered under my 5/60 warranty, might check that first.The recall began April 17, 2019. Owners may contact Kia customer service at 1-800-333-4542. Kia’s number for this recall is SC176. 12/28/2014. STRUCTURE:BODY:ROOF AND PILLARS. Kia Motors America (Kia) is recalling certain model year 2010-2013 Kia Soul vehicles manufactured January 8, 2009, to October 2, 2013, equipped with a sun roof.Feb 7, 2020 · 2015 Kia Soul.90K miles. 1.6 AT. p0420 code. did temp check up/down stream for both cats and found downstream was 125~ degrees cooler than up stream so I know it’s a bad cat (s). But here’s my situation: 90K miles, didn’t have recall done since my VIN was never under the recall list (searched multiple times) Dec 22, 2021 · My check engine light was on, now it's off. Code P0455 and P0420, mechanic says I need 2 catalytic converters. Car is 2015 Kia Soul , car isn't getting enough power on interstate or going uphill shoul … read more 🔴 ¡Descubre todo sobre el código de avería P0420! En este video, exploraremos la descripción, los síntomas, las causas y las soluciones para resolver este p...Again, $7E8 & $7E9 are not engine codes. A basic OBD2 scan tool offers a few different modes (from 1 to 10) to perform particular tasks on your cars. In this case, $7 represents mode 7, which basically means diagnostic code request. E8 (or E9) indicates that you request fault codes from module E8 (or E9). In conclusion: What you have to do when ...

Come discuss the Kia Sorento, Rio, Sportage, Soul and more! Show Less . Full Forum Listing. Explore Our Forums. 2011 - 2013 (XM) Sorento Forum 2016 - 2020 Sorento Forum 2003-2010 Sorento Forum 3G 2011 - 2016 Sportage 1G (1993 - 2002) Sportage. ... Kia-Forums.com is not in any way affiliated with Hyundai Motor Group …

Check engine light came on, Code P0420 Catalyst System Efficiency Below Threshold (Bank 1) poped up on my scanner. Cleared the code and have driven it over 50kms, no issue (low or weaker performance). I have a 2013 Rio with 143000 kms. Warranty on emmision system ended at 130,000 kms. Hope it doesn't return, but from what I read so far, O2 ...This video shows you how to remove and replace the downstream oxygen sensor on a 2012 Kia Soul. The check-engine light was on and the free diagnostic test at...=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code KIA P0455 Saving Repair ...Expand user menu Open settings menu. Log In / Sign UpFeb 19, 2023 · Most all manufacturers struggle with some issues. Yeah, Kia seems to have had a rough time. My lady's Soul has almost doubled the 100,000 blow-up timer, though. Other than the p0420, and slight oil consumption (I had a Celica with the 1zzfe, talk about oil consumption!), the car seems solid, looks good, rides nice. CEL: P0326 knock sensor 1 circuit. Second check engine light in my car's existence. (First was for a bad throttle body and a throttle positioning sensor, got those replaced under warranty.) I've attached a screenshot from my phone, reading the Bluetooth OBDII devices I have.2013 Kia Soul, bought used in 2017 from rental car company/auto repair guy. approx. 165000 miles on it. Its has a check engine light on for a while, I was told by an auto repair guy that it was likely the 02 sensor or bad gas cap (I do have a bad gas cap). ... I had a p0420 code, so I replaced catalytic converter. Car had trouble starting a ...KIA RIO 5 2007 P0420 Code. 4857 Views 3 Replies 3 Participants Last post by aquanaut20, ... Only show this user. Check engine light with P0420 code. (I have a cheap code reader.) Have had this code for 6 months. - ~56,000 miles - Clear it and it usually comes back on after driving 60 miles or so.So to summarize, IF you have the P0455 code on your 2.0L KIA, check your gas cap, and if that isn't it, have them check the reading on the fuel pressure sensor. If it's out of spec, that will be the actual problem. Of course, have them do the smoke test to smoke the system too, but more than likely, it's going to be your fuel cap or your fuel ...Base 2017 Kia Soul 1.6L Engine Got it a few months ago, since getting it but before taking it to the shop: Check engine light was on most of the time, but sometimes was not ... My check engine light turned on and I got it tested and got the P0420 code. I scheduled my car to get looked at but now the engine light turned off coincidentally after ...

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P0420: Catalyst Efficiency Below Threshold. Related Vehicles: 2012-2018 Veloster 1.6L GDI. Notes/Hints: Check the downstream O2 sensor. If the sensors signal is dropping when it shouldn't, or reading low voltage during WOT, replace it first, clear code (s) and recheck before condemning the catalytic converter. no todo el tiempo es el vatalizador el problema P0420 is Catalyst Efficiency Low, but that won't directly cause a rough idle. There is something more going on with your engine. A mis-firing cylinder can cause a rough idle and (indirectly) catalyst problems, but you should have a P0300, P0301, P0302, etc code to indicate which cylinder is mis-firing. 1. beetleapologist.Thanks! Kia Soul: Crankshaft Position Sensor (CKPS). Repair procedures - Engine Control System - Engine Control / Fuel System. Engine Control / Fuel System. Engine Control System. Crankshaft Position Sensor (CKPS). Repair procedures. It is on the front of the engine, takes a few minutes to replace, held in with one 10mm bolt and …A p0420 is specifically for catalytic converter performance. It could theoretically be caused by a small exhaust leak around an oxygen sensor, but it's most commonly caused by a failed catalytic converter. A loose gas cap is most likely to cause a p0455, which is the code for a gross evaporative emissions system leak.I have a 2014 Soul with 108,000 miles. Today the check engine light came on. Took it to AutoZone, their reader said bad catalytic converter. I bought a bottle of Cataclean, put it in tank, and after about 20 miles driven the check engine light went off.Subreddit dedicated to the auto maker Hyundai. Come share news and pictures and discuss everything related to Hyundai. Discussions about Hyundai Group corporate cousin Kia are also welcome, though they should really go in /r/Kia. Hyundai dealers, corporate reps, etc, please message the mods about an official flair.#p0420 #p0430 #catalyticconvertercodes #badcat #autel #motoragetrainingThe “Catalytic Converter Efficiency” codes, P0420 and P0430, are among the top 10 DTCs...Kia may, from time to time, update its press releases, issue new releases, or publish other information to reflect new information. Notice to California residents We collect personal information on consumers who engage with us, and we may share certain personal information with affiliates, service providers and third parties.For reference, the 2010 Kia Soul originally had a starting sticker price of $13,995, with the range-topping Soul ! Wagon 4D starting at $18,890. ….

Here is a tutorial on how to fix code p0420 catalyst system efficiency below threshold bank 1 how to diagnose and fix a Catalytic Converter and what to look ...A professional shop can use a smoke machine to test precisely where your Soul’s EVAP system is leaking from. The vapor canister purge valve is a common cause of the P0442 trouble code and the Kia Soul. The purge valve lets fuel vapor out of the charcoal canister and into the intake manifold. They are easy to replace.B. bwdz75. 3268 posts · Joined 2020. #3 · Nov 13, 2020. P050A is a code for higher than expected idle RPM. It happens to all Souls on startup in cold weather at times. Throttle body cleaning, carbon cleaning etc.. can kind of help it but in reality there is no fix for it.2014 Kia Soul 126k miles is throwing a P0420 code. Oil has been changed by me every 5k miles. CEL initially came up 2 weeks ago, I cleared it hoping it was just a fluke. It came back with same P0420 code this morning. I had my car detailed mid-December, they did an underbody wash which tripped different sensor code (can't remember which) that ...18 kia soul + P0335 code. Jump to Latest Follow. 918 views 2 replies 3 participants last post by 56chuzz May 19, 2023. wthobgood Discussion starter. 1 post · Joined 2022. #1 · May 18, 2023. Looking for an snswer on a fix for this, have peplaced both cam sensor A and B replaced and a 02 sensor replaced, still getting P0335 showing.P0420 code. Jump to Latest Follow. 471 views 8 replies 6 participants last post by Oktavf Mar 28, 2024. P&G1990 Discussion starter. 3 posts · Joined 2024. #1 · …Most all manufacturers struggle with some issues. Yeah, Kia seems to have had a rough time. My lady's Soul has almost doubled the 100,000 blow-up timer, though. Other than the p0420, and slight oil consumption (I had a Celica with the 1zzfe, talk about oil consumption!), the car seems solid, looks good, rides nice.Whether you want endless riches or just want to steal some penises, consider a deal with Satan. Once, as I was drinking at a bar in a Boston, a stranger offered to buy me a beer in...The brand's iconic "Jumpman" logo is at stake, as well as it's reputation as an innovator. Nike is currently embroiled in three legal struggles, one over copyright and two over int...How to fix you emissions p0420 code for cheap, easy, fast. Watch this video and learn how to turn off you cars check engine in under 10 minutes with parts av... Po420 kia soul, 14075 posts · Joined 2011. #4 · Aug 5, 2014. A bad coil pack could cause p0420 through lots of misfires. Those misfires would throw a lot of unburnt gas into the cat and enough of them could eventually cause it to overtemp and not work so well afterwards. The thing is, you'd feel all of those misfires., Spa Soul at Hyatt Centric consist of 15-metre indoor pool surrounded by warmed loungers, a Vitality pool with swan-neck fountain, personal Jacuzzi corners, fitness and Pilates areas, male and female relaxing areas, hamam, adventure room, snow room and 11 treatment rooms., To diagnose the P050A KIA code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., Spa Soul at Hyatt Centric consist of 15-metre indoor pool surrounded by warmed loungers, a Vitality pool with swan-neck fountain, personal Jacuzzi corners, fitness and Pilates areas, male and female relaxing areas, hamam, adventure room, snow room and 11 treatment rooms., I got a P0420 code on my 2014 Kia Soul. It states warm up catalyst efficiency, below threshold Bank 1. The car runs fine accept when after I stop at a light, and press the gas pedal, the RPM goes to 3, then back down to 2. Also when it's raining, my windows fog up if I turn on my heat but clears up if I turn on my air conditioner, even when it ..., P0300 code denotes "Random or Multiple Cylinder Misfire Detected.". This diagnostic trouble code (DTC) implies that your car's computer detected random or multiple-cylinder engine failures. Along with P0300, you'll probably see another OBD-II code, ranging from P0301 to P0308. All these codes indicate engine misfires., Look for ANY rusted open or cracked exhaust pipes/flange connections.ANY unmetered air getting into the exhaust can cause "goofy" codes and the cel to happen. Our 2012 Rio5 also has had the P0420 code and came up at about 77k miles, now at 81k miles. Comes on and off randomly but stays mostly on., Come discuss the Kia Sorento, Rio, Sportage, Soul and more! Show Less . Full Forum Listing. Explore Our Forums. 2011 - 2013 (XM) Sorento Forum 2016 - 2020 Sorento Forum 2003-2010 Sorento Forum 3G 2011 - 2016 Sportage 1G (1993 - 2002) Sportage. Top Contributors this Month View All T., Look for ANY rusted open or cracked exhaust pipes/flange connections.ANY unmetered air getting into the exhaust can cause "goofy" codes and the cel to happen. Our 2012 Rio5 also has had the P0420 code and came up at about 77k miles, now at 81k miles. Comes on and off randomly but stays mostly on., This page is meant to help you troubleshoot the Kia Soul P0430 trouble code. It covers the P0430 code's meaning, symptoms, causes, and possible solutions. P0430 is an emissions-related trouble code and is virtually never a breakdown risk. ... If the code changes to P0420, that would indicate that one of the O2 sensors is bad on the …, Kia Soul Exhaust Manifold Catalytic Assembly. Part Number: 285102EJM0. Vehicle Specific. $2802.62 MSRP: $3958.50. You Save: $ 1155.88 ( 30%) Check the fit. Add to Cart. Product Specifications. Other Name: Manifold Catalytic A; Catalytic Converter, Exhaust Manifold., Troubleshooting of a KIA P0452 Code, "Evaporative Emission Control System Pressure Sensor Low Input.", 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 be a false alarm triggered by a defective O2 sensor. The engine control module (ECM) uses two O2 sensors, one in front, and one behind ..., Check engine - P0420 . ... Kia Soul Kia Motors Cars and Motor Vehicles comments sorted by Best Top New Controversial Q&A Add a Comment. nonplausible • Additional comment actions ... Ending up having to get a new computer and having Kia dealership program it. Bought the computer online from eBay for 40 and the programming was around 500., There was an Idle Air Control valve in the 2009-2011 Souls. As I went looking through the FSM, I came across the PCV valve as a possible cause of rough idling and stalling. The PCV valve is easy to either clean or replace. Also mentioned as a possible cause: vapor hose damaged or disconnected., Getting engine light for kia soul 2015 1.6l. Code p0420. ecu has been updated prior to light going on. are they still responsible for catalytic converter/ engine damage? Mechanic's Assistant: That code indicates a problem with the catalytic converter Is the check engine light blinking or flashing, or is it solid? When did you first notice it?, P0420 Code frustation ... Come discuss the Kia Sorento, Rio, Sportage, Soul and more! Show Less . Full Forum Listing. Explore Our Forums. 2011 - 2013 (XM) Sorento Forum 2016 - 2020 Sorento Forum 2003-2010 Sorento Forum 3G 2011 - 2016 Sportage 1G (1993 - 2002) Sportage. Top Contributors this Month, A personnel shakeup at the US Federal Reserve Bank of Minneapolis last week at first flew under the radar; by the time the Minneapolis Star-Tribune reported the news, followed by o..., Request for Eric-Automotive Repair Shop Manager-ONLY: Eric this is Jeff, youve helped me with some Kia questions in the past and I got a DTC P0420 (bank 1 below threshold) on a 2015 Kia Rio a few week …, Jack Canfield, author of the Chicken Soup for the Soul series and The Success Principles, talks about his biggest money mistakes. By clicking "TRY IT", I agree to receive newslette..., Related: P0420 Kia Soul. Kia Soul P0401 Symptoms. Most of the time, there will not be symptoms associated with P0401 in the Kia Soul. There may be a slight ping or knocking sound on rare occasions. Service Engine Soon Light- P0401 will illuminate the service engine soon light., The Side Barrier test simulates an intersection collision between a standing vehicle and moving barrier at 38.5 mph. The Side Pole Barrier test simulates a crash into a fixed object like a tree or utility pole. The Rollover Resistance test measures the risk of rollover in a single-vehicle, loss-of-control scenario., Used 2013 Kia Soul Pricing. Used 2013 Kia Soul pricing starts at $5,481 for the Soul Wagon 4D, which had a starting MSRP of $15,595 when new. The range-topping 2013 Soul ! Wagon 4D starts at ..., Summary: Kia Motors America (Kia) is recalling certain 2012-2013 Sorento, 2012-2015 Forte and Forte Koup, 2011-2013 Optima Hybrid, 2014-2015 Soul, and 2012 Sportage vehicles. An engine compartment ..., I got a P0420 code on my 2014 Kia Soul. It states warm up catalyst efficiency, below threshold Bank 1. The car runs fine accept when after I stop at a light, and press the gas pedal, the RPM goes to 3, then back down to 2. Also when it's raining, my windows fog up if I turn on my heat but clears up if I turn on my air conditioner, even when it ..., 2013 Kia Soul Long-term Test Car: More Heart and Soul. By KBB Editors 09/21/2012 5:34pm., The least-expensive 2024 Kia Soul is the 2024 Kia Soul LX 4dr Wagon (2.0L 4cyl CVT). Including destination charge, it arrives with a Manufacturer's Suggested Retail Price (MSRP) of about $19,990 ..., A personnel shakeup at the US Federal Reserve Bank of Minneapolis last week at first flew under the radar; by the time the Minneapolis Star-Tribune reported the news, followed by o..., P0204 is an OBD II trouble code. It means that you have a fuel injector with a circuit malfunction, specifically the fourth cylinder in the firing order). It's generic code, which means that it means the same thing for the Kia Soul as it would for any other vehicle.. When the PCM sees that the voltage from cylinder 4 is outside the normal operating range, this code is thrown., Come discuss the Kia Sorento, Rio, Sportage, Soul and more! Show Less . Full Forum Listing. Explore Our Forums. 2011 - 2013 (XM) Sorento Forum 2016 - 2020 Sorento Forum 2003-2010 Sorento Forum 3G 2011 - 2016 Sportage 1G (1993 - 2002) Sportage. Top Contributors this Month View All T., , This Pitstop provides information on some 2010-2013MY Soul (AM), 2014-2019MY Soul (PS), and 2020~MY Soul (SK3) vehicles equipped with the engines listed below, which may set DTC P0011, P0014, P0016, or P0017 after an engine replacement. If these DTCs were not present prior to engine replacement, the camshaft reluctor wheel (also called pulse ..., Answer: OBD-II trouble code P0420 indicates a possible fault with your Kia Sedona's catalytic converter. The actual description for trouble code P0420 is "Catalyst System Low Efficiency". With a P0420 it is very important to properly diagnosis the vehicle's entire emissions system. P0420 may be a false code if other emission problems exists ...