Code p0420 dodge ram 1500

RAM 1500 EcoDiesel Forum (2014-2019) RAM 1500 Diesel General Discussion P0420 Code. Tags ecodiesel p0420 ram1500 ecodiesel. Jump ... What was the fix you found for the P0420 code. I've been deleting the code but it comes back every 100 miles or so. Save Share. Like.

Re: dodge ram 1500 2003. p0172. by spurs » Sat Jun 20, 2015 5:03 pm. I cleaned the MAP sensor due to it being a possible solution in the posting on the technical description for P0172 OBD-II trouble code in OBD-codes.com. But i had read it wrong, it said to clean the MAF sensor which this model truck doesn't have. 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,. Catalytic converters don't last forever. In this video, we diagnose a P0420 on a Toyota Camry with over 330,000 miles! Enjoy! 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. 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

2002 Ram 1500 SLT 4x4 QC ~ 02 Ram 45RFE to Jeep GC TCM 5-45RFE Upgrade - (Nov.01) 4.7L with 91K/3588hrs, 4.56 R&P/DTT, Sonnax Line Booster, SRT-10 Pod w/Dynojet Wideband Commander, 2-speed manual transfer-case, Clifford Security System w/Auto Start/Auto Windows, RB1 CD/DVD/NAV Infinity Sound System w/30GB iPod, Offroad Package, 33" Bridgestone Dueler A/T, Mopar Rear Wheel Liners, K&N w/Airaid ...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...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 …2003 Dodge Durango 4.7 4x4 2004 Dodge Ram 1500 5.7 Hemi 2014 Toyota Camry SE 2000 Buick Century. Save Share. Like. sandman88. 82 posts · Joined 2006 Add to quote; Only show this user #7 · May 21, 2009. Is the p0420 code always the converter? I just had my check engine light come on today and that's the code that's …The definition of code P0420 Is Catalyst Efficiency. You may have an oxygen sensor problem or a catalytic converter problem. Your vehicle has 2 oxygen sensors. Check your oxygen sensors.If they are then you may need a catalytic converter. Depending on your mileage it may be covered under a Dodge emissions warranty.Jul 27, 2019 ... I picked up a new daily driver and it came with a check engine light. This light was displaying a "P0420" code. Ths code tells us that the ...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.The most common fix for P0420 in the Dodge Ram is a new catalytic converter, followed by an O2 sensor replacement. Before taking your Ram 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 Ram: 1. Check for Other Codes.

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.P0420 Code. Tags ecodiesel p0420 ram1500 ecodiesel. ... Ram1500Diesel.com is the largest RAM 1500 Diesel forum community on the web with discussions on 2014+ Ram EcoDiesel trucks. Discuss performance mods, towing capacity, wheels, tires, lift kits, and much more! Show Less .According to Popular Mechanics Magazine, the most common check engine light codes for a Dodge Ram 1500 include P0300 (random/multiple cylinder misfire detected), P0171 (system too lean bank 1), P0420 (catalyst system efficiency below threshold bank 1), and P0455 (evaporative emission system leak detected).P2098 is a generic OBD II code. It specifically indicates that your Ram detected a lean condition after the catalytic converter (too much air for the amount of fuel present). P2098 Definition This particular code is generic, so it has the same meaning for your Dodge Ram as any other vehicle. There are three parts.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.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.

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Daytona 1500 said: Help i have replaced o2 sensors and i am still getting this code p0420. Bank 1. Does this mean drivers side cat is bad or should i try another sensor. Yes. Your computer takes readings from the sensor before the cat (S1) and compares it to the sensor readings after the cat (S2). If the cat isn't doing it's job, you will get ...Diagnostic steps to address the P20EE code in Ram 1500 EcoDiesel: 1. Scan for fault codes: Use an OBD-II scanner to retrieve the specific trouble codes, including the P20EE code. 2. Inspect the DPF and catalytic converter: Visually examine the DPF and catalytic converter for any signs of damage or clogging. 3.Dec 19, 2019 · P0520 is a common OBD2 trouble code. It's generic, which means that it has the same meaning for the Dodge Ram as it would any other vehicle. P0520 indicates that the oil pressure sensor is operating outside of its normal "range". It is typically caused by a bad oil pressure sensor switch or a. Check Details Code p0420 dodge dart, chrysler 200, jeep cherokee compass renegade. Cargurus code dodge van ram explain emission p0420 someone please helpful found peopleDodge ram p0456: evap system – small leak 2011, 5.7, 217,000 miles, p0016Dodge workshop manuals > ram 1500 truck 4wd v8-5.7l vin d (2005.Ram Year. 2012. Engine. 5.7 hemi. I was driving the truck home yesterday and all the sudden it wanted to die out , would restart but only running on a few cylinders. Got it home and would barely run , full tank of fuel , removed the line from the pump and put a gauge in it , 60 psi at key on , same with cranking , note that in order to do this ...

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.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 ...Oct 4, 2022 · 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 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. 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.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 moreThis is my experience testing Hot Shot Secret. I am super impressed, and definitely a believer. I am not sponsored, Paid by or receiving any promotional item...Many Dodge owners report good success running a cleaner in the engine, taking the vehicle on a highway driving 15-20 miles or more. The code is then cleared and hopefully stays off. If the code does stay on or comes back, the catalytic converter likely news to be replaced, or the vehicle has a bad 02 sensor. Causes and Fixes Dodge P0420 Code ...I have a 2003 Dodge Ram 1500. Keep getting the same code on check engine light....Help! 17 Answers. I have a 2003 Dodge Ram 1500 4wd, Club Cab. Runs good except I keep getting the same code on the check engine light. Random misses Cylinder 5 & 6. I have had the oxy sensors replaced. Replace th...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

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 …

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 ... 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 engine coolant temperature is monitored with the engine running. The Diagnostic Trouble Code (DTC) will be set in Powertrain Control Module ( PCM) memory when PCM senses engine coolant temperature does not reach 176°F (80°C) while driving for 20 minutes after the start. P1281 Dodge Code - Engine Is Cold Too Long.4’th Cylinder. P0304 is a cylinder-specific misfire code, meaning only your Ram’s fourth cylinder has a misfire. Before you can even diagnose P0304 in your truck, you need to find the fourth cylinder’s location. On “V” configuration engines, it’ll usually be the second cylinder on the head further away from the front of the engine.Control Circuit Malfunction. If the PCM has commanded cooling fan 1 to turn on, but there is an error, P0480 will be stored in the PCM’s memory. This occurs if either …=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code DODGE P0430 Saving Repai...Ram dodge 1500 evap check code 2004 engine system hemi leak truck 7l p0456 po441 cap light 4x4 purge gasEngine code p0441 fixed on my 2003 dodge ram 1500 P0441 code 2015 big hornP0441 dodge ram. 03 dodge ram 1500 p0441 100% authenticObd ii code p-0441 on my 2003 dodge ram 2500 P0441 dodge ram …

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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...May 19, 2021 · Diagnostic trouble code(DTC) P0420 stands for “P0420 Catalyst System Efficiency Below Threshold (Bank 1).”. It indicates that the exhaust system’s oxygen levels are below the required threshold in Bank 1, which can damage the engine’s exhaust and fuel system. Bank 1 refers to the side of the engine that houses the number one cylinder. 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.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. May 15, 2023 · Key Takeaways for Diagnosing a P0700 Code in Your Dodge Ram 1500. Understand the possible causes, symptoms, and solutions associated with the P0700 code. Check the vehicle’s transmission control module (TCM) for any faults. Inspect the wiring and connectors for any damage or loose connections. Check the level of the transmission fluid, as a ... Ram p0420 code dodge tonight 1500 2002 pop had dodgeforum P0420 dodge grand caravan Dodge p0420 dart compass. P0420 – Catalytic converter system, bank 1 -efficiency below threshold. P0420 dodge caravan 2013 Code p2271: signal du capteur o2 biaisé/ coincé riche banque 1 capteur 2011, 5.7, 217,000 miles, p0016.Your computer probably uses both static RAM and dynamic RAM at the same time, but for different reasons. See what both types of RAM do in your computer. Advertisement Your computer...Labor: 1.0. To diagnose the P0452 Dodge 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. ….

A 2014 Dodge Ram 1500 weighs 2,325 kilograms (5,126 pounds) and a payload of 708 kilograms (1,560 pounds). This truck has a towing capacity more than its weight of 3,606 kilograms ...Jan 7, 2024 · The P0420 code for a Dodge vehicle indicates a problem with the catalytic converter on bank 1. P0420 is a diagnostic trouble code that relates to the catalytic converter on bank 1 in Dodge vehicles. When this code appears, it suggests that there is a malfunction with the catalytic converter, specifically on bank 1. 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 definition of code P0420 Is Catalyst Efficiency. You may have an oxygen sensor problem or a catalytic converter problem. Your vehicle has 2 oxygen sensors. Check your oxygen sensors.If they are then you may need a catalytic converter. Depending on your mileage it may be covered under a Dodge emissions warranty.Computer RAM and Memory articles explain how your computer’s memory system works. Check out the HowStuffWorks Computer RAM and Memory Channel. Advertisement Memory refers to ...Top 4 Reasons Why You Replaced O2 Sensor and Still Have Code. The most common codes that people will see in this particular situation are P0134, 0138, and 0139, though you are probably seeing P0420. These codes do not point out to a specific issue but they can help hint at the root cause of the issue. Here are a couple of the parts to take a ...While most OBD2 codes can affect your car’s engine or transmission in general, the code P1762 is among the most common specific codes. If you don’t know much about the P1762 code meaning and implications on your car’s vital systems, the first step toward solving the code is to learn more about the code’s main causes.. We’ll help …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 …How to diagnose code P0420 on a Ram ProMaster. 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 … Code p0420 dodge ram 1500, P0420 Code. Tags ecodiesel p0420 ram1500 ecodiesel. ... Ram1500Diesel.com is the largest RAM 1500 Diesel forum community on the web with discussions on 2014+ Ram EcoDiesel trucks. Discuss performance mods, towing capacity, wheels, tires, lift kits, and much more! Show Less ., 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 ..., 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 …, While most OBD2 codes can affect your car’s engine or transmission in general, the code P1762 is among the most common specific codes. If you don’t know much about the P1762 code meaning and implications on your car’s vital systems, the first step toward solving the code is to learn more about the code’s main causes.. We’ll help …, 2002 Dodge Ram 1500 Quad Cab 5.9L Magnum Intake: Plenum Plate, Runners Cut, Ported, & Dodgepickup Epoxied Fastman 52mm Throttle Body & 180° Thermostat 4" Doetsch Spindle Lift w/ 305/55 Toyo OC ATs on 20" KMC XD Rockstars 3.92 AS rear w/PML cover Brass Cap & Rotor, Taylor 8.2s & NGK Dash Overlay, Tinted Tails K&N CAI System DynoMax CAT back exhaust, 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., 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 ..., =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code DODGE P0430 Saving Repai..., 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 , 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 …, P0302 in the Dodge Ram is a common OBD II trouble code. It indicates that your truck’s second cylinder has a misfire. P0302 is a real drivability concern and should be dealt with right away. If it’s bad enough to cause your Ram’s check engine light to come on, you shouldn’t drive your truck at all. Repairing P0302 should be considered a ..., Feb 8, 2021 ... 2018 Dodge Ram Code ... Ram Ecodiesel P0420 DPF clog, low power, really bad fuel economy fix. ... 2013-2018 Dodge Ram 1500 8 speed Transmission ..., O2 sensor change, 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)., The p0300 code is a diagnostic trouble code that is stored when your dodge ram 1500’s engine control module detects a misfire. This code is common among all modern vehicles and is often associated with a random cylinder misfire. Code p0300 indicates that there is a problem with the ignition system, fuel system, or engine mechanical system., Jan 7, 2024 · The P0420 code for a Dodge vehicle indicates a problem with the catalytic converter on bank 1. P0420 is a diagnostic trouble code that relates to the catalytic converter on bank 1 in Dodge vehicles. When this code appears, it suggests that there is a malfunction with the catalytic converter, specifically on bank 1. , Feb 10, 2010 · 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. , 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. The odometer will show any codes in sequence. Write down these codes., The most common fix for P0430 in the Dodge Ram is a new catalytic converter, followed by replacing the Oxygen sensor. Before taking your Ram into an exhaust shop for a new catalytic converter, let’s ensure that’s what you need. Here’s a good P0430 diagnostic order for the Dodge Ram: 1. Check for Other Codes., 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., P0420 Code. Tags ecodiesel p0420 ram1500 ecodiesel. ... Ram1500Diesel.com is the largest RAM 1500 Diesel forum community on the web with discussions on 2014+ Ram EcoDiesel trucks. Discuss performance mods, towing capacity, wheels, tires, lift kits, and much more! Show Less ., 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 ..., Ram p0420 code dodge tonight 1500 2002 pop had dodgeforum P0420 dodge grand caravan Dodge p0420 dart compass. P0420 – Catalytic converter system, bank 1 -efficiency below threshold. P0420 dodge caravan 2013 Code p2271: signal du capteur o2 biaisé/ coincé riche banque 1 capteur 2011, 5.7, 217,000 miles, p0016., Aug 17, 2020 · As the code description implies the P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). , May 19, 2021 · Diagnostic trouble code(DTC) P0420 stands for “P0420 Catalyst System Efficiency Below Threshold (Bank 1).”. It indicates that the exhaust system’s oxygen levels are below the required threshold in Bank 1, which can damage the engine’s exhaust and fuel system. Bank 1 refers to the side of the engine that houses the number one cylinder. , The definition of code P0420 Is Catalyst Efficiency. You may have an oxygen sensor problem or a catalytic converter problem. Your vehicle has 2 oxygen sensors. Check your oxygen sensors.If they are then you may need a catalytic converter. Depending on your mileage it may be covered under a Dodge emissions warranty., How to diagnose code P0420 on a Ram ProMaster. 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 …, 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., 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 …, 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 …, Im in the same boat after replacing cat - (p0420 code) Although its not on my dodge, I am having the same exact issue! Its my 97 Honda Prelude. When I got the car, ... 2001 Dodge Ram 1500, QC 4x4, 5.9 360, 3.92 Superchips 3865 Galls Street Thunder siren, Code 3 L.E.D. Warning Dash Light, (VFD POV), 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 ..., 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.