Code p0420 dodge ram 1500

Catalytic converters don't last forever. In this video, we diagnose a P0420 on a Toyota Camry with over 330,000 miles! Enjoy!

Dec 10, 2021 · 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 else. P0480 is usually caused by a bad fan or a bad fan relay. Good luck fixing your Dodge Ram! P0480 is a relatively common OBDII trouble code. It indicates that your Dodge Ram's "cooling fan 1 control circuit" is malfunctioning. It's a generic code, so it has the same meaning for any vehicle made for the 1996 model year and up.Jun 16, 2017 ... Comments744 · The Trainer #118: The REAL Cause Of P0420/P0430 DTCs · How To Diagnose A P0420 Catalytic Converter Low Efficiency Code Plus Exhaust&nbs...Mar 29, 2024 · Codes p0300 and p0420. On startup it has a rough idle. Voltage will drop a little bit. After a few minutes it'll smooth out. Answered in 29 minutes by: Dodge Mechanic: Keiphun Sowell. Keiphun Sowell. Category: Dodge. Satisfied Customers: 5,728. 2010 Chevy Traverse P0420 code I have a 2010 Chevy Traverse with approx. 150000 miles on it. About a month and a half ago I replaced the bank 1 converter and the O2 sensors. I got a PO420 code. Cleared the code and the light has not come back on. Trying to figure out why I get the code and what I need to look before I go and spen...Dec 5, 2023 · Some common Dodge Ram 1500 codes include P0300 (random/multiple cylinder misfire), P0420 (catalyst system efficiency below threshold), and P0171 (system too lean). These codes represent various problems, such as engine misfires, issues with the catalytic converter, or a lean fuel mixture. I have a 2005 dodge ram 1500 5.7 L Hemi 4 door engine light on odometer code reeds P0420 can you - Answered by a verified Dodge Mechanic We use cookies to give you the best possible experience on our website.Description. The Powertrain Control Module ( PCM) detects a condition where the vehicle has remained in open loop fuel control, from a start-up condition, longer than a calibrated amount of time, when conditions would have otherwise closed loop operation. P1128 Dodge Code - Closed Loop Fueling Not Achieved Bank 1.

Dodge ram 1500 p0420. Q&a: dodge ram 1500 p0420 code2001 dodge ram 1500 starts and runs fine. dies after about 10 minutes Dodge ram van questionsDodge p0420 dart compass. 2010 ram 1500 4.7 throwing p0420Q&a: dodge ram 1500 p0420 code Dodge ram 1500 3.9 5.2 5.9 p0133 p0132 is it a bad sensor pcm wires badDodge …The P0420 code is a common automotive diagnostic code that many Dodge Ram 1500 owners may encounter. This code specifically relates to the catalytic converter’s efficiency and indicates that there is a potential issue with this component. When the P0420 code is triggered, it means that the catalytic converter is not functioning at its optimum ...Just popped the CEL on my truck last week with this code P0420. I have about 93,000 miles on my 05 Ram 1500. Went to the local auto parts shop and picked up a new Bosch O2 sensor - actually bought two as I am going to replace both downstream sensors while the truck is up on jacks.p0420. I had a 1997 Dodge Ram 1500 2wd extended cab short bed with the 5.9. I was on a trip and got gas and shortly after filling up the check engine light came on (within 6 miles) and the truck is fully warmed up. I pulled over and scanned it for codes and it was a P0420 which means (Catalyst System Efficiency Below Threshold).Oct 25, 2010 ... The reason the check engine light goes on with P0420 code is because when you are driving at a constant speed, the flow in exhaust creates a ...

May 21, 2021 · 2010. Engine. 5.7. I have a 2010 1500 5.7 I’m new to this forum. it has a rough idle and runs poor, when coming to a stop the rpms bog out like it wants to stall but corrects it self. It has a “tick” sound. It wasn’t throwing codes and just yesterday it did and got p0301 misfire cylinder 1. I went over it today and found 2 (so far ... I own a 2018 RAM1500 EcoDiesel and this time I have a P0420 that the engine threw this afternoon after I drove after a while. The code read "Catalyst System Efficiency Below Threshold." The truck runs great. I see no difference in MPG, and performance is great! I just want to know if anyone else experience this code and what was done in order ...p0420. I had a 1997 Dodge Ram 1500 2wd extended cab short bed with the 5.9. I was on a trip and got gas and shortly after filling up the check engine light came on (within 6 miles) and the truck is fully warmed up. I pulled over and scanned it for codes and it was a P0420 which means (Catalyst System Efficiency Below Threshold).Ram Year. 2005. Engine. Hemi 5.7. I have a 2005 Dodge Ram 1500 5.7. 171K miles. P0420 code came on so I replaced O2 sensors. Code came back on a day later. I replaced the wires, plugs and coils and it stayed off for about 3 …As of 2015, approximately 24 recalls involving Dodge Ram 1500 models have been documented since 1997. Various safety reasons were cited for the recall of Dodge Ram 1500 vehicles. U...

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P0420 dodge grand caravanP0420 code dodge ram 1500 Dodge ram p0420: eficiencia del sistema del catalizador → por debajoHow to fix dodge p0420 engine code in 3 minutes [3 methods / only $19.. P0420 dodge grand caravanRam promaster oil change Code défaut p0420: circuit de catalyseur, ligne 1 – rendement inférieurDodge …Dear Lifehacker,Apr 27, 2015 · I have a 2007 dodge ram 1500 with tuned exhaust. For the last couple months I have had this pickup in to 4 different shops to help resolve an engine code P0420. They have replaced an o2 sensor on the … read more Dec 11, 2023 · The P0480 code in Dodge vehicles can be triggered by various factors, including: 1. Faulty cooling fan relay: The cooling fan relay may fail, preventing proper operation of the cooling fan. 2. Defective cooling fan motor: A malfunctioning fan motor may not operate at all or spin inconsistently, causing the P0480 code. 3.

The codes p1596 and 0420 have appeard on my 2002 dodge ram 1500 quad cab and was needing assistance. The P1596 is Speed Control Switch Always High and P0420 is Catalyst Efficiency Below Normal (Bank 1) and try taking the positive cable off battery for ten minutes and see if that doesn't help that way it will reset the computer and …The codes p1596 and 0420 have appeard on my 2002 dodge ram 1500 quad cab and was needing assistance. The P1596 is Speed Control Switch Always High and P0420 is Catalyst Efficiency Below Normal (Bank 1) and try taking the positive cable off battery for ten minutes and see if that doesn't help that way it will reset the computer and …Sep 11, 2018 ... ... was performed on a 2005 Dodge Ram 1500 5.7L HEMI. It has also worked on a Subaru. I am sure that it will help you! Good luck! #whatcomesnext.p0420. I had a 1997 Dodge Ram 1500 2wd extended cab short bed with the 5.9. I was on a trip and got gas and shortly after filling up the check engine light came on (within 6 miles) and the truck is fully warmed up. I pulled over and scanned it for codes and it was a P0420 which means (Catalyst System Efficiency Below Threshold).Find out what code P3497 means, its triggers, symptoms, and what you can do to resolve this trouble code in this guide. ... 2009-2018 Ram 1500 Tutorials; Shop At ; Need car parts? Select your vehicle GO. Auto Repair » OBD-II Trouble Codes ... P0420 Code; P0430 Code; P0300 Code; P0455 Code; P0401 Code; P0172 Code; P0446 …2010 dodge grand caravan p0420 code2017 dodge ram 1500 lime green forgeline cv3c-truck Dodge ram p0420: eficiencia del sistema del catalizador → por debajo del umbral → banco 12001 dodge ram 1500 starts and runs fine. dies after about 10 minutes. i'm getting a code p0340.P0320 is a relatively common ignition-related trouble code. P0320 indicates that your Dodge Ram's ignition/distributor engine speed circuit is malfunctioning. P0320 is most likely caused by the engine speed sensor, or a wiring issue. P0320 Definition: Ignition/Distributor Engine Speed - Input Circuit Nearly all modern vehicles, including the ...I almost bought a code scanner until I learned on this forum how to see the codes in my vehicle. 1. Get in the truck and depress the brake pedal. 2. Turn the key to the on position (when the instrument panel lights up) and off three times. That’s on/off, on/off, on. Leave the key in the on position on the third sequence.My 94 dodge ram 1500, 5.2L, runs okay but began using lot of fuel. Had trouble codes 37, 32, and 51. Cleaned throttle body and checked for vaccum leaks or bad hoses.Dodge Ram Truck 3rd Gen (02 – 08) Forums. 3G Dodge RAM - General Talk ... My code reader says its the EGR valve on the 2004 1500 5.7 truck Im working on. ... ~2004 Ram 1500 SLT Quad Cab Hemi - work horse …If the P0171 is combined with the P0174 code, it's likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) sensor. If the problem persists the front oxygen (O2) sensor may need to be replaced.

8880 posts · Joined 2005. #2 · Jul 14, 2011. if an oil leak caused this code i would be shocked. not knowing the year of your truck makes it hard to tell if you replaced the correct sensors. the 04and up trucks had 4 and the 02-03 only had 2 or3 cant remember. according to the internet the code is for bank one. meaning driver side. so …

Common 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.A P0420 code is set when the upstream sensor and the downstream oxygen sensor sense the catalytic converter is not doing its job. Basically, the amount of oxygen going into the converter is not being burned, and it detects it through the downstream sensor. Oxygen is the key here. Modern Engine Management Systems leave a little bit of extra ...The P0420 code is a common automotive diagnostic code that many Dodge Ram 1500 owners may encounter. This code specifically relates to the catalytic converter’s efficiency and indicates that there is a potential issue with this component. When the P0420 code is triggered, it means that the catalytic converter is not functioning at its optimum ...P0420 OBD-II Trouble Code Technical DescriptionCatalyst System Efficiency Below Threshold (Bank 1) ... Dodge Ram Truck 3rd Gen (02 – 08) Forums. 3G Dodge RAM ...P0420 Code. How to fix it. Don't spent tons of $$$. ~This also true for the po430 Code!Check out My Amazon Auto Accessories Store! Lets make that Weekend job...Description. The Powertrain Control Module ( PCM) detects a condition where the vehicle has remained in open loop fuel control, from a start-up condition, longer than a calibrated amount of time, when conditions would have otherwise closed loop operation. P1128 Dodge Code - Closed Loop Fueling Not Achieved Bank 1.The codes p1596 and 0420 have appeard on my 2002 dodge ram 1500 quad cab and was needing assistance. The P1596 is Speed Control Switch Always High and P0420 is Catalyst Efficiency Below Normal (Bank 1) and try taking the positive cable off battery for ten minutes and see if that doesn't help that way it will reset the computer and …Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. ... 2004 2wd Dodge Ram QC w/a 5.7 with Royal Purple 5w-20 in ...

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The P0420 code is typically only for the sensor after the catalytic converter. ... 2009 Ram 1500 5.7 MDS - weird #5 misfire problem ... Dodge Ram Generations Forum ...Had a p0420 code pop tonight (2002 ram 1500)2006 dodge ram 1500 5.7 hemi v8 having problems ( code p0642 has appeared and p2128) Q&a: dodge ram 1500 p0420 codeDodge workshop manuals > ram 1500 truck 4wd v8-5.7l vin d (2005) > powertrain management > prom.Vehicle: 2006 Jaguar XJR. by Webmaster » Fri Sep 17, 2004 2:54 pm. The first thing I would do is reset the "check engine" light and drive it for a few days and see if it comes back. This should help: Jim Grant's Tech Tips. '96 Mercury Sable, OBD II Code P0420. Q: Can you tell me what OBD Code P0420 “Catalyst system efficiency below …P0441 dodge ram Ram p0441 evap purge incorrect trigger ecm emissions Dodge ram p0441: meaning, causes, how to fix. P0441 dodge ramP0441 dodge ram Blowing p0441 ram 15002003 dodge ram 1500. P0441 chrysler evaporative purge . P0441 dodge ram. Check Details. P0441 dodge ram. Check Details. 2003 Dodge Ram 1500 - …Jul 16, 2013 ... We have a 2005 Chrysler Town & Country 3.8 with a P0420 Catalyst System Efficiency Below Threshold (Bank 1). Join us as we diagnose this ...P0174 and P0171 (fuel trim lean bank one) are the most frequently seen air/fuel mixture-related codes. If they appear together, it reduces the list of potential causes (more on that in the last section of the article. The most common causes of P0174 are a vacuum leak or a dirty MAF sensor. On older Hemi Ram’s, the fuel pump is often the issue.This code indicates that there is a problem with the electrical circuit that controls the cooling fan’s operation. The cooling fan is crucial in maintaining the engine’s …8880 posts · Joined 2005. #2 · Jul 14, 2011. if an oil leak caused this code i would be shocked. not knowing the year of your truck makes it hard to tell if you replaced the correct sensors. the 04and up trucks had 4 and the 02-03 only had 2 or3 cant remember. according to the internet the code is for bank one. meaning driver side. so …Description. The Powertrain Control Module ( PCM) detects a condition where the vehicle has remained in open loop fuel control, from a start-up condition, longer than a calibrated amount of time, when conditions would have otherwise closed loop operation. P1128 Dodge Code - Closed Loop Fueling Not Achieved Bank 1.The most common fix for P0420 in the Dodge Sprinter is a new catalytic converter, followed by an O2 sensor replacement. Before taking your Sprinter into an exhaust shop for an (expensive) new catalytic converter, let’s ensure that’s what you need. Here’s a good P0420 diagnostic order for the Dodge Sprinter: 1. Check for Other Codes. ….

Check Details 2001 dodge ram 1500 starts and runs fine. dies after about 10 minutes. Dodge ram 1500 3.9 5.2 5.9 p0133 p0132 is it a bad sensor pcm wires badCode p0420 dodge dart, chrysler 200, jeep cherokee compass renegade 02 ram 1500 5.9l p0420 and p0138 codesP0420 1998 cargurus k1500 chevy code answers.Ram Year. 2005. Engine. Hemi 5.7. I have a 2005 Dodge Ram 1500 5.7. 171K miles. P0420 code came on so I replaced O2 sensors. Code came back on a day later. I replaced the wires, plugs and coils and it stayed off for about 3 …694. Truck Year. 2015. Nov 4, 2020. #4. No Problem, The Term is used in everyday use in the commercial World, its Use in connection to Large fleet owners that retard the Power. Their are 15L Engines that are So XXXXXX that 8.3L Cummins out …bought a 2006 dodge ram 1500 pretty dirt cheap it has a problem, to were it has OBD II trouble codes, P0300,P0420,P0456,P0401,P0138 pop up. vehicle has been siting for about 7 months.When try to start … read moreFind out what code P3497 means, its triggers, symptoms, and what you can do to resolve this trouble code in this guide. ... 2009-2018 Ram 1500 Tutorials; Shop At ; Need car parts? Select your vehicle GO. Auto Repair » OBD-II Trouble Codes ... P0420 Code; P0430 Code; P0300 Code; P0455 Code; P0401 Code; P0172 Code; P0446 …Jan 2, 2014 ... Do you occasionally get code P0420 - catalytic converter low efficiency? This $3 electrical circuit may fix the problem permanently by ...Third gen ram 1500 owner seeks p0524 code helpQ&a: dodge ram 1500 p0420 code Code p2271: signal du capteur o2 biaisé/ coincé riche banque 1 capteur2011, 5.7, 217,000 miles, p0016. Check Details. P0420 2003 dodge ram 1500.The P0420 code signals a low catalyst system efficiency. This code suggests that the oxygen levels are below the desired threshold (Bank 1), which most often results from problems with your car ...My truck is reporting a code P0420, which apparently is "Catalyst System Efficiency Below Threshold (Bank 1)" which can either be the catalytic converter or the rear O2 sensor. The code came on at about 30k miles, so I doubt it's the converter.P0420 code meaning, causes, symptoms, and step-by-step DIY diagnosis/repair guide for catalyst system efficiency below threshold. Code p0420 dodge ram 1500, P0420 dodge. Ram dodge 1500 orange pearl sport 2009 sunburst gtcarlot quad cab 4x4Dodge chrysler p0440 p0441 leak esim Seeks appearsSeeks third responds. Evap dodge ram 1500 system 2003 p0456 hemi p0441 nvld p0440 know codes canister dtc pump chrysler control 2008 do . Check Details Check Details. 2007 Dodge Ram 1500 …, codes P0420, P0441, P0300 what do they mean. Asked by Chilly01 Aug 01, 2017 at 08:55 PM about the 2003 Dodge RAM 1500 SLT Quad Cab 4WD. Question type: Maintenance & Repair. I drive a Dodge Ram 1500 5.7 liter Hemi. The Lighting Bolt light on and truck wont respond when pressing the gas pedal. Truck won't go over 10 to 20 mph,., It’s usually caused by a broken hose or a faulty EVAP purge valve. P0441 is one of the more common OBD II codes that can occur in the Dodge Ram. It is frequently caused by a loose or bad gas cap, cracked or disconnected EVAP system hoses, vacuum leaks, or a bad purge valve. Always start by taking a look at the gas cap. P0441 is …, P1403 Loss Of 5 Volts To EGR Sensor - Read Our Article on Automotive Circuit Testing For Help With This Dodge Check Engine Light Code. P1475 Auxiliary 5 Volt Output Too High. P1476 Too Little Secondary Air. P1477 Too Much Secondary Air. P1478 Battery Temp Sensor Voltage Out Of Limit., How to fix a Dodge with a P0420 Code, "Catalyst System Efficiency Below Threshold (Bank 1)."Cataclean 120007 on Amazon: https://amzn.to/3EkiF4nRead here for ..., Dec 2, 2023 ... 2017 RAM PROMASTER CITY 2.4 | HOW TO REPLACE CATALYTIC CONVERTER & CLEAR CODE P0420 | Howto/Diy. 237 views · 4 months ago ...more. The ..., Feb 5, 2019 · P0133 is a common OBDII code that occurs in many vehicles, including the Dodge Ram. The code is triggered when there is an issue with the response time from the oxygen (O2) sensor when switching voltage levels. The O2 sensor is responsible for helping the ECM meter oxygen levels in the exhaust in order to create the ideal air/fuel mixture. , More than 276,000 cars with Takata airbags are on a "do not drive" order after recent deaths. The last thing you expect when you climb into your car is being hurt—or killed—by a de..., Dec 2, 2023 ... 2017 RAM PROMASTER CITY 2.4 | HOW TO REPLACE CATALYTIC CONVERTER & CLEAR CODE P0420 | Howto/Diy. 237 views · 4 months ago ...more. The ..., Ram Year. 2007. Engine. 5.7 Hemi. I've got an 07 1500 5.7 QC 4x4. She's got roughly 181k miles on her. For about a year now I've had an intermittent cel for P0420. I've done a spark plug change, ran system cleaner, reset ecm, used an infrared thermometer and live data feed to try to diagnose it. Both infared and the LD show the cats to be ..., If you’re in the market for a new truck, the Dodge Ram 1500 is a popular choice. With its powerful performance, spacious interior, and rugged design, it’s no wonder why so many peo..., The cost to fix a P0340 code in your Dodge Ram can vary depending on the specific issue. If the problem is a faulty camshaft position sensor, the cost of the replacement may range from $100 to $200, for the parts., The P0463 code in Dodge Ram is a common issue that can cause the check engine light to turn on. The major causes of this code can be traced to several factors, including a faulty fuel level sensor, wiring issues, and other related problems. A fuel level sensor that fails to operate correctly can give inaccurate readings, leading to the P0463 code., The P0420 code in a Dodge Ram will often be thrown if one of your truck’s oxygen sensors is not functioning correctly. There are rarely drivability issues associated with P0420. For most people, the first sign that anything is wrong is the service engine soon light coming on. Here are the typical … See more, =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code DODGE P0430 Saving Repai..., Apr 4, 2011 · Engine code p0420. The P0420 code is set when the oxygen sensor after the catalytic converter gives a reading the same or very close to the reading of the oxygen sensor (s) before the catalytic converter. There are usually three possible causes... The front oxygen sensor (before the cat) is giving an incorrect reading. , P0480 is usually caused by a bad fan or a bad fan relay. Good luck fixing your Dodge Ram! P0480 is a relatively common OBDII trouble code. It indicates that your Dodge Ram's "cooling fan 1 control circuit" is malfunctioning. It's a generic code, so it has the same meaning for any vehicle made for the 1996 model year and up., P0138 "02 SENSOR CIRCUIT HIGH VOLTAGE BANK 1 SENSOR 2". P0420 "Catalyst System Efficiency Bank 1". I would imagine the next thing to do is to change out the cat, but I dunno where to look for a cali emissions cat. All ive found cost $1000 for all new cats and piping. Like., swap the rear driver side o2 sensor with the rear passenger side o2 sensor-might be a pain though with rust. disconnect the negative on your battery for a few minutes to erase the 420 code and see if the code pops up on the other side-should come up as p0430. 2011 1500 CC Sport 4x4. Like., Recurring P0344. Immediately after starting my truck and driving about 30 feet my engine started jerking and acting like it was going to stall every time I'd try to decelerate. Check engine light came on, P0344. I turned off the truck, restarted it and didn't have any problems again however I replaced the Camshaft Position Sensor anyway …, bought a 2006 dodge ram 1500 pretty dirt cheap it has a problem, to were it has OBD II trouble codes, P0300,P0420,P0456,P0401,P0138 pop up. vehicle has been siting for about 7 months.When try to start … read more, P0420 CEL Came on. 2021 2500 6.7 I got a code of P0420 catalytic converter took it to the stealership and they checked o2 sensor and nox sensor advised me of a dent in my catalytic converter and the gaskets are leaking. They cleared the code and told me it might come back only time will tell., How to fix a Dodge with a P0420 Code, "Catalyst System Efficiency Below Threshold (Bank 1)."Cataclean 120007 on Amazon: https://amzn.to/3EkiF4nRead here for ..., Clear your Ram’s trouble codes with a scanner. Start the engine and wait for the check engine light to come back on. If it changed to a different P030X code, the plug was bad. If nothing changed, do this for the coil packs and plug wires (if equipped). If the code stays P0301, you’ve ruled out ignition-related issues., The company faces increasing competition from specialty and mainstream retailers. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I..., Jan 7, 2020 ... In this video I replace both 02 sensors on the driver's side of my 2005 Dodge Ram 1500 with the 5.7 Hemi v8. Even though the title just says ..., Catalytic converters don't last forever. In this video, we diagnose a P0420 on a Toyota Camry with over 330,000 miles! Enjoy!, Oct 24, 2022 ... How to fix a Dodge P0432 Error Code, "Main catalytic converter, bank 2 -efficiency below threshold." Link to Cataclean on Amazon: ..., Dodge Ram Truck 3rd Gen (02 – 08) Forums. 3G Dodge RAM - General Talk. Status Not open for further replies. PO133 Code. Jump to Latest Follow ... P0420 OBD-II Trouble Code Technical DescriptionCatalyst System …, Code P0430 – 2004 Dodge Ram 1500 4.7. May 6, 2020 February 13, 2024; I have got a code p0430. I changed the spark plugs and coils along with bank1 sensor1 O2 Sensor. The Code is still appearing. ... Dodge Code P0430 Code P0430 Description. Catalyst Efficiency Below Threshold Bank 2. Code P0430 Diagnostic Testing. 1., The P0463 code in Dodge Ram is a common issue that can cause the check engine light to turn on. The major causes of this code can be traced to several factors, including a faulty fuel level sensor, wiring issues, and other related problems. A fuel level sensor that fails to operate correctly can give inaccurate readings, leading to the P0463 code., 694. Truck Year. 2015. Nov 4, 2020. #4. No Problem, The Term is used in everyday use in the commercial World, its Use in connection to Large fleet owners that retard the Power. Their are 15L Engines that are So XXXXXX that 8.3L Cummins out …, Nov 21, 2023 · Specific to Chrysler products, these are the more common issues with the Catalyst System Efficiency Below Threshold (Bank 1) fault code: Dodge Avengers w/2.4L – Failed catalytic converters and oxygen sensors are the most common issue related to P0420. Dodge Avengers w/3.6L – Failed catalytic converters and oxygen sensors are the most common ...