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.The P0430 code is an OBD-II trouble code that stands for “Catalyst System Efficiency Below Threshold (Bank 2)” which indicates a problem with the catalytic converter, which is located near engine Bank 2 (the engine’s opposite side from the number one cylinder). In this article, I will be talking about the P0430 trouble code, its symptoms ...General Motors said it has secured more than 110,000 reservations for its new all-electric Chevrolet Silverado, which includes reservations from more than 240 fleet operators, Chai...guys Im throwin 2 of the same codes. 2 p0430 codes. motor is new and I was told its most likely a bad cat or cats and possibly a o2 sensor. could someone with knowledge of this help me out please . Sep 30, 2011 #2 SunlitComet OBS Jedi-Do Good. Joined Sep 30, 2010 Posts 16,206May 24, 2021 · The P0430 is a check engine light code that shows that the efficiency and performance of your catalytic converter are less than the required threshold. This means that every time you turn on your vehicle, you’re adding more pollution to the environment than you should. Several reasons might cause this code to appear. Ignoring the P0430 code can lead to bigger problems down the road. By understanding its meaning, potential causes, and your repair options, you can tackle this check engine light monster with confidence. And thanks to PartsHawk, you might even save some cash while keeping your Ford, Chevy, or Nissan purring happily!Code Number: Code Description: Related Codes: P0300: Random/Multiple Cylinder Misfire(s) Detected: P0301 - Cylinder 1 Misfire Detected. P0302 - Cylinder 2 Misfire Detected. P0303 - Cylinder 3 ...A P0430 error code means that the system is operating below the efficiency threshold. Your catalytic converter is an essential component for reducing your emissions. If it’s not …Code Number Code Description Related Codes; P0420: Catalyst System Efficiency Below Threshold (Bank 1) P0430 - Catalyst System Efficiency Below Threshold (Bank 2)Only reset the codes IF you want to - it is NOT necessary to do this. CODE LIST 10-PCM - Powertrain Control Module P0101 Mass Air Flow (MAF) System Performance ... P0430 TWC System Low Efficiency Bank 2 ... A forum community dedicated to Chevy Corvette owners and enthusiasts. Come join the discussion about … While the most common causes of the P0430 code are a faulty catalytic converter and faulty O2 sensor, P0430 can also be caused by other issues: A catalyst defect due to aging. Malfunctioning oxygen sensor (lambda sensor) circuits. A faulty front and/or rear lambda sensor. Damaged lambda sensor wiring. Leakage of mass airflow sensor. As the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working …This page is meant to help you troubleshoot the Chevy Suburban P0430 trouble code. It covers the P0430 code's meaning, symptoms, causes, and possible …Ok so here it goes. My check engine light has been coming on for about a year. It will go off after about a week. It's the p0430 code every time. So I've been trying everything to get this fixed but I'm at my wits end. I've replaced the cats, I've put new downstream o2 sensors, new dual cat back exhaust, New plugs and wires. What am I …Dec 29, 2021 · 8496 posts · Joined 2015. #2 · Dec 29, 2021. Well, the obvious "cause" would be the cat's are used up. It's possible there is a wiring/connector issue doing it, and it's possible that if the engine isn't running right, that cause use up the cat's faster. 2004 Sierra 3500 dually, 6.0L extended cab, cab&chassis flatbed, upgraded to 4wd. If the readings don’t change at all while you do this, that means the problem triggering a P0327 or 332 is an open circuit in the knock sensor. You can also check the knock sensor’s resistance with a multimeter (2:19). Set the meter to ohms (which looks like a little horseshoe), place one of the leads on the ground, and the other on one of ...The trucks and SUVs made by Chevrolet and GMC are almost identical. GMC vehicles, however, cost more than Chevrolet vehicles because General Motors markets GMC vehicles as more pro...Chevy S10 P0430: Symptoms. The P0430 code in a Chevy S10 will often be thrown if one of your truck’s oxygen sensors is not functioning correctly. There are rarely drivability issues associated with P0430. For most people, the first sign that anything is wrong is the service engine soon light coming on.Feb 20, 2023 ... 2007 Chevy Tahoe fix P0430 Code Lacquer Thinner. 3.7K views · 1 year ago ...more. TurnThemWheels. 819. Subscribe.Catalyst System Efficiency Below Threshold (Bank 1) is the meaning of the P0420 code. This code indicates that Catalyst System Efficiency (Bank 2) is below the threshold (P0430). The number one cylinder is located on the bank 1 side of the engine. In Bank 2, you will find the opposite side of the engine. P0420 and P0430 both showed up and are ...Put new 5.7 Vortec in my 98 Chevy PU now I have codes P0420 and P0430 after 50 miles. Vacuum is good at 17in at 2,000 RPM and I cannot detect any exhaust leaks. I had it to the dealer at 10 miles with ...Sep 11, 2018 ... P0430 Code- Keep that check engine light out · Comments148.The bank 2 version of this code is P0430. ... The P0420 code in a Chevy Tahoe will often be thrown if one of your vehicle’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. ...Definition: Catalyst system efficiency below threshold (bank 2) The P0430 engine code refers to a problem with your car’s three-way catalyst converter (bank 2), which is responsible for breaking down harmful pollutants from the combustion cycle and converting them into less harmful gases.8496 posts · Joined 2015. #2 · Dec 29, 2021. Well, the obvious "cause" would be the cat's are used up. It's possible there is a wiring/connector issue doing it, and it's possible that if the engine isn't running right, that cause use up the cat's faster. 2004 Sierra 3500 dually, 6.0L extended cab, cab&chassis flatbed, upgraded to 4wd.One of the most common reasons that this code will display is if your catalytic converter is faulty or having issues. This trouble code can also be caused if your engine is misfiring or having issues starting. Another common issue that can cause a P0430 trouble code is if your fuel injector is leaking. This should be investigated immediately.P0430 after removing the intake manifold could be an indication of an air leak at the manifold. Faulty gasket or a cracked manifold could be the culprit. Coolant entering the cylinder can also cause this and the coolant leak could be caused by the same issue (s) stated above. Check the bottom of the oil fill cap for frothy moisture deposits as ...The P0430 code is a diagnostic trouble code (DTC) that may appear on the vehicle’s onboard diagnostic (OBD-II) system. It specifically relates to the catalyst system’s efficiency, specifically in Bank 2 of the engine. Bank 2 typically refers to the side of the engine that does not contain the number one cylinder.2006 GMC Envoy Denali, 2013 Chevy Equinox LTZ, 2002 GMC Envoy. TollKeeper. Supporting Donor. Member. Dec 3, 2011 8,118 Brighton, CO. Jan 22, 2020 #2 ... I have owned it nearly two years and never had the P0430 code until recently. The 5.3L has the DOD and associated oil issues, which nearly everyone who had kept theirs beyond 120K …On a Chevy or Dodge V8, the cylinders are numbered 1-3-5-7 on the driver side bank and 2-4-6-8 on the passenger side bank. ... P0430 Code; P0300 Code; P0455 Code; P0401 Code; P0172 Code; P0446 Code; P0011 Code; P0340 Code; Automotive Features toggle close features. Driving; Lifestyle; EVs and Hybrids;Jan 22, 2018 ... ... P0430 code. These are your catalytic converter efficiency codes. By installing a spark plug non fouler with a drilled hole you can keep the ...Ignoring the P0430 code can lead to bigger problems down the road. By understanding its meaning, potential causes, and your repair options, you can tackle this check engine light monster with confidence. And thanks to PartsHawk, you might even save some cash while keeping your Ford, Chevy, or Nissan purring happily!Dec 29, 2021 · 8496 posts · Joined 2015. #2 · Dec 29, 2021. Well, the obvious "cause" would be the cat's are used up. It's possible there is a wiring/connector issue doing it, and it's possible that if the engine isn't running right, that cause use up the cat's faster. 2004 Sierra 3500 dually, 6.0L extended cab, cab&chassis flatbed, upgraded to 4wd. I had a broken MAF sensor trigger P0430 and P0420 codes never got the MAF sensor code though.. Have had no issues or P0420/p0430 since replacement of that.. i would buy a code reader from walmart for 50$ and see if the CATs are actually heating up they should be about 350C-700C on these V8 engines. under normal running conditionsWhat is the Cost to Diagnose the Code P0430 2016 Chevrolet Silverado? Labor: 1.0. To diagnose the P0430 2016 Chevrolet Silverado 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.Sep 13, 2018 · This page is meant to help you troubleshoot the Chevy Colorado 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. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor. Table of Contents A faulty catalytic converter, damaged O2 sensor, wiring issues, and exhaust leaks are the most common reasons why the on-board computer can log a P0430. If the computer logs a P0430 code, your vehicle can exhibit symptoms like an illuminated check engine light and a failed emissions test. Contentshide. 1.Pretty funny. The bank 1 catalytic converter (P0420) matches the cylinder 3 misfire bank. My current theory is that either (a) coils were going bad for awhile before I got the misfire code and damaged the cats, or (b) cold weather triggers catalytic converter codes more easily. Today was a high of 15 degrees.Feb 25, 2024 · P0430s usually mean what it says, a bad cat. But a large air leak in the exhaust on that side could also throw that code. Check for broken exhaust manifold studs, leaks around the cylinder head and the header flange and make sure the O2 sensors are screwed all the way down. This last one got me once. 2009 GMC Yukon XL SLT 5.3 K5L - 2012 GMC ... For More Info visit us at: http://1aau.to/h/cvP/Is your Check Engine Light on? The trouble code P0430 suggests there might be a problem with your catalytic c...8496 posts · Joined 2015. #2 · Dec 29, 2021. Well, the obvious "cause" would be the cat's are used up. It's possible there is a wiring/connector issue doing it, and it's possible that if the engine isn't running right, that cause use up the cat's faster. 2004 Sierra 3500 dually, 6.0L extended cab, cab&chassis flatbed, upgraded to 4wd.What is the Chevy P0430 code? P0430 code Chevy implies that the catalyst system efficiency is below the Bank 2 threshold. So, the catalytic converter on Bank 2’s exhaust manifold is inefficient and emits excessive environmental pollution. Can bad spark plugs cause a P0430 code? Yes. Having defective spark plugs can cause the code P0430 to ...This page is meant to help you troubleshoot the Chevy Traverse P0420 trouble code. It covers the P0420 code's meaning, symptoms, causes, and possible solutions. P0420 is the most common OBDII code and is virtually never a breakdown risk. A failing oxygen sensor or bad catalytic converter are the most common causes of P0420. TableAn illuminated check engine light has brought a 2012 Chevrolet Traverse into the shop. In this video, Master Trainer Drew Jablonowski of Garage Gurus shows t...2004 chevy avalanche 1500: exhaust..codes p0430, P0336..rattling 2004 chevy avalanche 1500 truck, cats were replaced last week because the insides broke and were spitting out of the exhaust. truck is repeating the same problems even with new cats and a new muffler. …The check engine light will turn on for codes P0420 and/or P0430 when the O2 sensor behind the catalytic converter senses an issue. Catalytic convertor with an exhaust manifold attached. Some catalytic converters have the exhaust manifold attached. Most vehicles with a V6 or V8 engine will have two catalytic converters.The P0430 code is a diagnostic trouble code (DTC) that may appear on the vehicle’s onboard diagnostic (OBD-II) system. It specifically relates to the catalyst system’s efficiency, specifically in Bank 2 of the engine. Bank 2 typically refers to the side of the engine that does not contain the number one cylinder. The most common mistake when diagnosing a P0430 code on Chevy Silverado and other car models is limiting the diagnosis to the catalytic converter and the oxygen sensor. A leaking fuel injector or leaking head gasket can be the culprit of a P0430 fault code. Therefore, ensure to extend the diagnosis to every probable cause. Jan 9, 2010 · 1999 chevy tahoe 5.7 eng . Im getting a code P0430 Catalyst Efficiency Below Threshold bank 2 ... 3619 posts · Joined 2011. #6 · Aug 7, 2014. P0430 means the cat's bad. Warranty on emissions is 5/80 federally mandated. Take the tune off and wait for the code to come back, then give it to the dealer. The exhaust work after the cat won't matter. Like. R. rc06 Discussion starter.The check engine light will turn on for codes P0420 and/or P0430 when the O2 sensor behind the catalytic converter senses an issue. Catalytic convertor with an exhaust manifold attached. Some catalytic converters have the exhaust manifold attached. Most vehicles with a V6 or V8 engine will have two catalytic converters.The P0340 diagnostic trouble code indicates a problem with the camshaft position sensor circuit. Find out how to fix it in this article! ... Popular Engine Codes P0420 P0172 P00171 P0128 P0300 P0456 P0430 P0442 P0455 P0113. ... 2010 Chevy Traverse, turning off highway into drive Car just died. Pushed it to the house noticed battery was …P0430 is a generic diagnostic trouble code that indicates a malfunction within the catalyst system. It may been seen with misfire codes and oxygen sensor codes. What the P0430 code means. The P0430 code is set when the ECU detects below threshold performance from the catalytic converter.Engine Code CHEVROLET P0430: Catalyst System Efficiency Below Threshold (Bank 2). It indicates that the Catalytic Converter is not functioning efficiently, so the vehicle is increasing...Right before heading home the check engine line popped on throwing a P0430 “catalyst system efficiency below threshold bank 2” code. After a little research it appears it could be the cat on the passenger side or the o2 sensor.The P0430 code is a diagnostic trouble code (DTC) that may appear on the vehicle’s onboard diagnostic (OBD-II) system. It specifically relates to the catalyst system’s efficiency, specifically in Bank 2 of the engine. Bank 2 typically refers to the side of the engine that does not contain the number one cylinder.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. April 1, 2020 by Jason. Like all OBD-II trouble codes, P0451 has the same meaning for all vehicles. It means that your Chevy Silverado ‘s EVAP system has a pressure sensor that is malfunctioning in some way. P0451 is usually caused by either a bad EVAP pressure sensor, a clogged fuel tank relief valve, EVAP lines, EVAP wiring, or a bad fuel cap.This article covers a few possible fixes for this code. P0430 Chevy Silverado – Fixing The Code Catalyst System Low Efficiency Bank 2. The P0430 code indicates that your vehicle’s catalyst system has low efficiency in Bank 2. This means that it is not converting the gas into clean energy, and is contributing to more pollution being released ... P0430 code definition. P0430 is a generic diagnostic trouble code that indicates a malfunction within the catalyst system. It may been seen with misfire codes and oxygen sensor codes. What the P0430 code means. The P0430 code is set when the ECU detects below threshold performance from the catalytic converter. Jun 7, 2021 ... I recently bought a Chevy traverse and within a day the check engine light came on. Code P0420 came up which I replaced the catalytic converter ...Jun 20, 2022 · The Diagnostic Trouble Code (DTC) will be set when the ECM determines that the efficiency of the catalyst has degraded below a calibrated threshold. P0430 2018 Chevrolet Silverado Code - Catalyst System Low Efficiency Bank 2 2004 chevy avalanche 1500: exhaust..codes p0430, P0336..rattling 2004 chevy avalanche 1500 truck, cats were replaced last week because the insides broke and were spitting out of the exhaust. truck is repeating the same problems even with new cats and a new muffler. …An expert who has answered 200 questions. Catalyst System Low Efficiency Bank 2 As the code description implies the P0430 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). Replacing the oxygen (O2) sensors may sometimes fix ...Jan 22, 2018 ... ... P0430 code. These are your catalytic converter efficiency codes. By installing a spark plug non fouler with a drilled hole you can keep the ...Check Engine Light and P0420 and P0430 Codes. So, your Check Engine light is on, and you’ve got either a P0420 or P0430 code, on your OBD-II scanner. This “Catalyst system efficiency below threshold” code is triggered when your car’s computer (the powertrain or engine control module (PCM or ECM)) detects a catalytic converter issue. 1A ...Catalyst System Efficiency Below Threshold (Bank 1) is the meaning of the P0420 code. This code indicates that Catalyst System Efficiency (Bank 2) is below the threshold (P0430). The number one cylinder is located on the bank 1 side of the engine. In Bank 2, you will find the opposite side of the engine. P0420 and P0430 both showed up …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. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor.Chevy Equinox P0430: Symptoms. The P0430 code in a Chevy Equinox will often be thrown if one of your vehicle’s oxygen sensors is not functioning correctly. There are rarely drivability issues associated with P0430. For most people, the first sign that anything is wrong is the service engine soon light coming on.Chevrolet. Silverado. Trouble Codes. P Codes (Powertrain) P0400 - P0499. P0430. SPONSORED LINKS. 1998 Chevy Silverado Didnt pass smog. P0430 code.How to diagnose DTC P0430 on a Chevrolet Suburban: This trouble code typically comes to an owner’s attention in one of two ways – when the check engine light (or more properly, the “Malfunction Indicator Lamp”) is lit, there’s a surprisingly decent chance that the issue is either DTC P0430 or DTC P0420 – catalytic converter issues really are …Jun 15, 2023 · The code P0430 means there’s an issue with the Bank 2 of your car’s exhaust system. In other words, it means that the downstream oxygen sensor is picking up an insufficient trace of oxygen in exhaust gasses. The oxygen sensor is placed after the converter to ensure its maximum efficiency, and if it picks up an issue with exhaust gasses, it ... Diagnostic trouble code (DTC) P0327 stands for “Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor).”. It is triggered when the powertrain control module (PCM) detects very low voltage readings from your vehicle’s primary knock sensor circuit. Take note that the voltage value may vary depending on your vehicle’s make and model.The P0430 code is an emissions-related issue and can be the result of a variety of factors. In this article, we will be discussed the meaning, causes, symptoms, and fixes for the P0430 code so that you can get back on the road as soon as possible. P0430 Code DefinitionOn my previous 2001, I used to get a P0420 (or P0430 - same thing other side) about once a year. I had surprisingly good luck by simply adding a 20oz bottle of Chevron Techron Concentrate in the gas tank, clear the code, do a few hard acceleration pulls and the code would not return. Cheap POTENTIAL solution. Good luck.What does that code P0430 mean? Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system. ... 1998 Chevy Silverado Didnt Pass Smog. P0430 Code.The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). A loose fuel tank filler cap is the most common cause that triggers the P0440 code. User Submitted Video. ⚠ Check if …P0430 is a generic diagnostic trouble code that indicates a malfunction within the catalyst system. It may been seen with misfire codes and oxygen sensor codes. What the …Feb 25, 2024 · P0430s usually mean what it says, a bad cat. But a large air leak in the exhaust on that side could also throw that code. Check for broken exhaust manifold studs, leaks around the cylinder head and the header flange and make sure the O2 sensors are screwed all the way down. This last one got me once. 2009 GMC Yukon XL SLT 5.3 K5L - 2012 GMC ... 2004 chevy avalanche 1500: exhaust..codes p0430, P0336..rattling 2004 chevy avalanche 1500 truck, cats were replaced last week because the insides broke and were spitting out of the exhaust. truck is repeating the same problems even with new cats and a new muffler. …Sep 13, 2018 · Chevy Equinox P0430: Symptoms. The P0430 code in a Chevy Equinox will often be thrown if one of your vehicle’s oxygen sensors is not functioning correctly. There are rarely drivability issues associated with P0430. For most people, the first sign that anything is wrong is the service engine soon light coming on. Restore your catalyst system and learn how do I fix trouble code P0430? This diagnostic trouble deals with your emissions system and alerts you to a potential issue with a bank two oxygen sensor. Learn how to diagnose, troubleshoot and solve this issue today. Aug 24, 2021 ... Weak Acceleration cause on Plugged Catalytic Converter, Other Symptoms would be stalling. When we opened up the Catalytic converter we found ...John Hege. Automotive Mechanic. 40 years of experience. A P0430 code indicates the catalyst efficiency has fallen off. If there are no other codes indicating misfires and if the check engine light is not blinking, you should be OK to drive your car. If you have trouble scheduling a convenient repair, you can call YourMechanic to have a mechanic ...The 420/430 are saying Catalytic converter system, efficiency below threshold for both sides. PCM judges this by what the 4 O2s are reporting. The S1s (front) as seen with a OBD-II scanner should bounce around at lot where. the S2s (after CATs) values are stable and less active.Chevrolet Silverado 1500 pickups from model years 2007-2013 have a higher occurrence of P0430 codes. The causes lean towards oxygen sensor failures and exhaust manifold leaks on these trucks. Thorough diagnosis helps identify the exact root cause.I show how I replaced the two oxygen sensors downstream of the catalytic converters to take care of the P0430 code. Technically the code is only for the lef...
January 3, 2023 by Jason. This page is meant to help you troubleshoot the Chevy Trailblazer P0430 trouble code. It covers the P0430 code’s meaning, symptoms, …. Loomis ace hardware
The most typical mistake made while troubleshooting a P0430 code on a Chevy Silverado and other auto models is limiting the diagnostic to the catalytic converter and the oxygen sensor. A leaky head gasket or fuel injector may be the source of a P0430 fault code. As a result, be sure the diagnosis covers all potential causes.2007 Silverado, 5.3, code P0430 bank 2, already switched the driver side and passenger side CO2 sensors behind the cat, - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. ... 2004 chevy avalanche 1500: exhaust..codes p0430, P0336..rattling ...This page is meant to help you troubleshoot the Chevy Silverado P0430 trouble code. It covers the P0430 code’s meaning, symptoms, causes, and possible …It has the p0430 code. 2003 Chevy Silverado, No, 4.8L extended cab, Online chat - Answered by a verified Chevy Mechanic. ... I have service air bag codes on my 2003 Chevy Silverado 2500HD -B0026 -Boo24 What is the issue and where? ...There are only two things that clean carbon off. Acetone, or steam. In the commercial injector cleaners, one of the primary ingredients is acetone. But a $170. injector clean, at the shop, can be accomplished by adding 3oz of acetone-per 10 gallons of gas, plus the lucas injector cleaner/upper cylinder lubricant mix.Code Number Code Description Related Codes P0430 Catalyst System Efficiency Below Threshold (Bank 2) P0420 - Catalyst System Efficiency Below Threshold (Bank 1)If the readings don’t change at all while you do this, that means the problem triggering a P0327 or 332 is an open circuit in the knock sensor. You can also check the knock sensor’s resistance with a multimeter (2:19). Set the meter to ohms (which looks like a little horseshoe), place one of the leads on the ground, and the other on one of ...This page is meant to help you troubleshoot the Chevy Traverse 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. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor. Table of …This page is meant to help you troubleshoot the Chevy Avalanche 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. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor. Table of ContentsJul 31, 2016 · P0430 Powertrain "Catalyst System Efficiency Below Threshold Bank 2". Few days ago I found check engine light on the truck and upon scanning with obd2 I found code is P0430. Before rushing to catalytic converter I inspect the truck and found cracked intake duct which is replaced and I also cleaned the throttle body as it was a bit dirty. Te suministramos todo lo que necesitas saber sobre el código DTC P0430 Descripción, causas, síntomas y posibles soluciones. LEER SOLUCIÓN DEL CÓDIGO O...This page is meant to help you troubleshoot the Chevy Sonic 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. P0430 is usually caused by a catalytic converter issue or a bad O2 sensor. Table of Contents. … What is the Chevy P0430 code? P0430 code Chevy implies that the catalyst system efficiency is below the Bank 2 threshold. So, the catalytic converter on Bank 2’s exhaust manifold is inefficient and emits excessive environmental pollution. Can bad spark plugs cause a P0430 code? Yes. Having defective spark plugs can cause the code P0430 to ... .