P0420 lexus is250

There are 4 O2 sensors in the IS350 - 2 upstream and 2 down stream. Upstream location is before the three way catalytic converter (TWC) and downstream is after TWC. Location of the sensors is called Bank 1 and Bank 2 where Bank 1 is driver side and Bank 2 is passenger side. Bank 1 Sensor 1. This is the upstream O2 sensor on driver side.

The C1201 Toyota code is set any time that the engine control system malfunctions. Because this can be caused by any defective sensor, system or wiring issue, it’s hard to determine what the cause is without looking at the other trouble codes. The main causes of a C1201 Toyota code include: A loose or defective gas tank cap.An example of a product line extension is the Toyota Lexus brand, which is a high-end extension of the basic Toyota brand that targets consumers looking for bargains. Diet Coke is a product extension of Coke, introduced to meet the need for...The catalytic converter is part of the exhaust system in Lexus IS and its main purpose is to convert exhaust gases like carbon monoxide and hydrocarbons that are harmful to health and the environment into less harmful byproducts, like carbon dioxide and nitrogen gas. ... If you see any fault code from P0420 to P0424 or from P0430 to P0434 …P0300 Random, Multiple Misfire Detected means that your car’s computer (PCM) detected that there is a misfire in random or multiple cylinders. Code P0300 is often related to bad spark plugs or spark plug wires but could be caused by a number of issues relating to ignition and the air-to-fuel ratio in the cylinders.A defective muffler. Symptoms of code P0420. Here are the most common symptoms of the mechanical and electrical problems related to this DTC: A “rotten egg” smell coming from the exhaust system. High oxygen levels may lead to an increase in sulphur in the fuel system, producing a foul odour. The check engine light comes on.=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code TOYOTA P2241 Saving Repai...Finding Discontinued Part. LS - 1st and 2nd Gen (1990-2000) - Operating with a dead converter. - I purchased a 2000 LS 400 with a 113,000 miles, I put 1,000 miles on it since September and just learned the catalytic converter is no longer good. Because of the age of the car in Mass, I can still get a sticker.

Trouble code P0420. Tests/Procedures: 1. Monitor the front and rear oxygen sensors while driving the vehicle at approximately 55 MPH. 2. Monitor the fuel trims for being normal at 55 MPH. 3. Check the inlet to outlet temperature on the catalytic converter. Generally the rear should be 50 degrees or more hotter.P0420 on an IS250 is after the cat on the driverside of the engine. It can be a result of a bad O2 sensor, exhaust leak, or faulty catalytic convertor. It is considered B1S2.Step 2 - Lubricate the hangers and rubber isolators. Use the silicone spray lubricant to spray a generous amount on each hanger and isolator. This will keep the rubber supple to avoid cracking and breaking of the metal, which will likely be rusty. If they do crumble or break, replacement kits are relatively inexpensive.Here's how to reset the VSC Trac OFF Light and the Check Engine Light on a Lexus RX330 SUV.Jun 23, 2022 · The most common P0420 and P0430 cause is a clogged catalytic converter filter, which requires replacing the entire catalytic converter. Other causes can include: A faulty or failing o2 sensor. Catalytic converter leaks. Exhaust , intake, or mass airflow (MAF) sensor leaks or other issues. Received 0 Likes on 0 Posts. Growling/Bubbling Noise from under car/Exhaust. Noise is most prevalent when idling. Seems to do away when accelerating and then comes after a few seconds after idling. Completely stumped. Noise is most prevalent underneath driver's side. 2006 Lexus IS250 Growling/Bubbling Noise from under car/Exhaust. Reply Like.Lexus ES300: , have have a 2000 lexus Es300 alreay have hello, have have a 2000 lexus Es300 alreay have done alot of work on the car but still having problems, just went and have them put the machine on and more codes came up. p300,p031,po302,po303,,po305, …

Some OBD-II cables schemes: OBD-2 ISO 9141-2 (14230-4, KWP2000) simple serial cable. OBD-2 J1850 PWM, J1850 VPW serial ELM327 cable. OBD-2 universal ISO 15765-4 CAN, SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2, ISO 14230-4 and SAE J1939 diagnostic cable.Replacing the catalytic convertors, and exhaust system on the Lexus IS250 and IS350 requires removing the oxygen sensors. Normally taking out these sensors r...P0420 - Catalyst System Efficiency Below Threshold Bank 1. P0441 - EVAP System Incorrect Purge Flow. P0446 - EVAP System Vent Control Circuit. P0455 - EVAP System Leak Detected - Large Leak.Lexus is250 2010 (111k) p0420 code. Just got a p0420 code along with a slip light today, is it time to go catless and what else should I check to figure out why the converter failed? …Code P0442 Lexus Tech Notes. The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the P0442 code. User Submitted Video. Check if Lexus has issued a Factory Service Bulletin for the P0442 code (2013 - Up Models): → …Replacing the catalytic convertors, and exhaust system on the Lexus IS250 and IS350 requires removing the oxygen sensors. Normally taking out these sensors r...

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Code: P0420 (Catalyst Efficiency Below Threshold) Oxygen sensors (O2) may trigger a check engine light to come on. A common fault code triggered by a bad Lexus oxygen sensor is P1150, P1133, and P1153 related to the sensor, which means the circuit for the heater element of the O2 sensor is defective.3.5L IS350 2023. From AED 225,000 Monthly AED 3,525. 3.5L V6. Lexus Premium Audio System with 10 Speakers. 19" F Sport Wheels. 10.3" Screen with 3D Navigation System. Moonroof. Blind Spot Monitor with RCTA.What is the Cost to Diagnose the Code P0430 Lexus? Labor: 1.0. The cost to diagnose the P0430 Lexus code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.If the voltage of the downstream oxygen sensor decreases and begins to fluctuate like the upstream oxygen sensor, it means that the oxygen levels are too high and the Powertrain Control Module (PCM) will store the P0420 trouble code. This can cause poor fuel mileage, shaking and vibrating (as you've described) and poor engine efficiency.2002 Lexus GS300 175K Miles Symptoms: (1) terrible gas mileage and (2) check engine light - pulled codes p0420 and p0430 I used a scantool application to pull the codes and monitored the OS 2 sensors' … read moreCode P0455 Lexus Tech Notes. The P0455 is a quite common code because the code is set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be cleared by disconnecting the car …

Labor: 1.0. To diagnose the P0037 Lexus 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.The P0430 trouble code is considered generic, meaning it occurs on vehicles of any type and model. The P0430 shows a problem with the emissions system. It is exactly the same as P0420 DTC, with the only difference being that that one refers to the oxygen sensors on bank 1 instead. These codes illustrate two different sides of the engine.What is the Cost to Diagnose the Code P0430 Lexus? Labor: 1.0. The cost to diagnose the P0430 Lexus code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.Mar 1, 2011 · Received 60 Likes on 45 Posts. P0441 - Evaporative Emission Control System Incorrect Purge Flow What this means - The code lets you know that part of the EVAP system is not functioning properly. The EVAP system contains many different parts, for example the gas cap, vacuum lines, carbon canister, purge valve, etc. The most common fix for P0420 in the Lexus IS 300 is a new catalytic converter, followed by an O2 sensor replacement. Before taking your IS 300 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 Lexus IS 300: 1. Check for Other Codes.Are you looking for a Lexus dealership near you? Whether you’re in the market for a new or used Lexus, it’s important to find the right dealership that can provide you with the best service and selection. Fortunately, finding a Lexus dealer...An "over reporting" Mass Air Flow Sensor can be a common cause of a code P0172 and P0175. Essentially, this means that the Air Flow Sensor is telling the computer that much more air is entering the engine than actually is. Based on this large amount of air entering the engine, the engine computer or PCM sprays more fuel into the combustion ...A P2714 can affect vehicles from Toyota, Chevrolet, Lexus, Nissan, Acura, Mercedes-Benz, and many more. See also P0796 Code: Pressure Control Solenoid "C" Performance / Stuck Off A vehicle’s powertrain control module (PCM) can store a P2714 code if it detects a problem with the transmission pressure solenoid “D.”Code P0455 Lexus Tech Notes. The P0455 is a quite common code because the code is set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be cleared by disconnecting the car …

This P0420 code was the only code it generated and seeing as the car has only done 83k miles the cats should be ok. ... Lexus Model: is250 Year of Lexus: 2008 ...

Lexus Model: IS250 SE-L. Year of Lexus: 2005. Location: Lancashire. Posted July 27, 2015. Hi guys, I've been getting this code intermittently, and I've got 150k miles, …P0420 - Catalyst System Efficiency Below Threshold Bank 1. P0441 - EVAP System Incorrect Purge Flow. P0446 - EVAP System Vent Control Circuit. P0455 - EVAP System Leak Detected - Large Leak.Labor: 1.0. To diagnose the P0037 Lexus 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.I've had this code a couple of times on a 2006 Lexus IS250. It's got 150k, so it's well used, but is running fine.Apr 18, 2022 · Would disconnecting the battery fix the check engine light and SVC light!?Instagram: Leek_eeMusicOpen Space by | e s c p | https://escp-music.bandcamp.comMus... Just got a p0420 code along with a slip light today, is it time to go catless and what else should I check to figure out why the converter failed? Advertisement Coins. 0 coins. ... Lexus is250 2010(111k) p0420 code . Just got a p0420 code along with a slip light today, is it time to go catless and what else should I check to figure out why the ...Causes. Possible causes of OBD code P0421 Lexus. A code P0421 Lexus may mean that one or more of the following has happened: The catalytic converter is no longer functioning properly An oxygen sensor is not reading (functioning) properly A sparkplug is fouled up.The Lexus IS (Japanese: レクサス・IS, Hepburn: Rekusasu IS) is a compact executive car (D-segment in Europe) sold by Lexus, a luxury division of Toyota since 1999. The IS was originally sold under the Toyota Altezza (Japanese: トヨタ・アルテッツァ, Hepburn: Toyota Arutettsua) nameplate in Japan from 1998 (the word Altezza is Italian for 'height' or …Discussion topics related to the 1990 - 2000 Lexus LS400 . Build Threads. Miss firing need help. by Jsutafurr. Today 05:46 PM. 28,618. 292,588. LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430 . Build Threads . CL Vendor Products for 3LS. trunk release. by demark1. Today 04:27 PM.The P0456 is a generic code stating that the Engine Control Module (ECM) detected a small leak from the evaporative system. This leak was detected during a self-test. For the code to come on, the test must fail two times …

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Sep 13, 2023 · What Does the P0420 Code Mean? 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. 19 Eki 2011 ... Panowie mam drobny kłopot okresowo wyrzuca mi check i wywala P0420 - Catalyst System Efficiency Below Threshold (Bank 1)* byłem na analizie ...Catalytic converters don't last forever. In this video, we diagnose a P0420 on a Toyota Camry with over 330,000 miles! Enjoy!This page is meant to help you troubleshoot the Lexus IS 300 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 ofAn example of a product line extension is the Toyota Lexus brand, which is a high-end extension of the basic Toyota brand that targets consumers looking for bargains. Diet Coke is a product extension of Coke, introduced to meet the need for...Jun 8, 2011 · Good voltage test results will tell you something may be wrong with how the cat is operating. A Combination of P0420 and P0430 may indicate an engine that is running rich and may not be a cat/O2 sensor issue. These links go into details further with testing the zirconia O2 sensors. How to Test an O2 Sensor | eHow.com. Current weather in Phường Sáu and forecast for today, tomorrow, and next 14 daysA broken one will result in worse fuel economy and sluggish performance, and in some states it can cause a vehicle to fail emissions testing. Browse 2014 Lexus IS250 catalytic converter replacements and find the right part for the right price at AutoZone.Code P0442 Lexus Tech Notes. The P0442 code means that the control module has detected a small leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the P0442 code. User Submitted Video. Check if Lexus has issued a Factory Service Bulletin for the P0442 code (2013 - Up Models): → Check here.Labor: 1.0. To diagnose the P0057 Lexus 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. ….

I've had this code a couple of times on a 2006 Lexus IS250. It's got 150k, so it's well used, but is running fine.To diagnose the P0057 Lexus 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.2006-2012 IS250, GS300, GS350 P0420, P0430 check engine light and/or car is loud - pinhole leak at y-pipe assemblyCode P0455 Lexus Tech Notes. The P0455 is a quite common code because the code is set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be cleared by disconnecting the car …Mar 1, 2012 · Are there any other codes (besides DTC P0420 or P0430) being output? Check gas leakage on exhaust system. Check heated oxygen sensor (bank 1, 2 sensor 1) Check heated oxygen sensor (bank 1, 2 sensor 2) Replace both of exhaust manifold (front catalyst) and front exhaust pipe. What Does the P0420 Lexus Code Mean? The Engine Control Module (ECM) uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air-fuel ratio sensor, sends pre-catalyst information to the ECM. Jun 14, 2020 · Labor: 1.0. To diagnose the P0057 Lexus 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. Lexus automobiles are designed and manufactured by Toyota Motor Corporation. Lexus is Toyota’s luxury vehicle brand, and the vehicles are manufactured in specific Lexus plants in Japan and Canada.Description 📷 Add Comment What does this mean? What are the Possible Causes of the DTC P0420 Lexus? NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Gas leak from exhaust system Faulty Three-way Catalyst Converter Bank 1 P0420 lexus is250, P0420 (catalyst efficiency, bank 1) 2. ... 2002 Lexus IS300 Sportcross. ~165K miles. (Bought from a board member in fact. ... Come in and enjoy our articles, galleries and information on aftermarket parts for the IS300, IS250, IS350. Full Forum Listing. Explore Our Forums. General Discussion Showroom Go Fast Stuff Go Faster …, Here is a more detailed list of the signs of a bad or failing MAP sensor you should look for: 1. Check Engine Light. The engine control unit constantly monitors all the sensors in your car engine while you drive the car. If one of these sensors’ values is out of the specified range, the check engine light will show up., Sep 3, 2008 · IS250_rookie. I just had my exhaust installed a few days ago and havent had any issues until today. My Check engine light came on, So I went to Lexus and the ran a diagnostic on it and came back with a code error P0420 "Catalyst System Efficiency Below Threshold (Bank 1). , Jun 8, 2011 · Good voltage test results will tell you something may be wrong with how the cat is operating. A Combination of P0420 and P0430 may indicate an engine that is running rich and may not be a cat/O2 sensor issue. These links go into details further with testing the zirconia O2 sensors. How to Test an O2 Sensor | eHow.com. , Received 0 Likes on 0 Posts. Growling/Bubbling Noise from under car/Exhaust. Noise is most prevalent when idling. Seems to do away when accelerating and then comes after a few seconds after idling. Completely stumped. Noise is most prevalent underneath driver's side. 2006 Lexus IS250 Growling/Bubbling Noise from under car/Exhaust. Reply Like., Viva Hotel Phú Yên, Phường Sáu - Reserva amb el millor preu garantit! A Booking.com t'esperen 17 comentaris i 45 fotos., Hi, P0446="EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL CIRCUIT" (Open or close malfunction in CCV - 2 trip detection logic). Quote. "MONITOR DESCRIPTION. The ECM tests the Evaporative Emissions (EVAP) system using the fuel tank pressure sensor, Canister Close Valve (CCV), and EVAP VSV. The …, Code P0420 Lexus Description. The Engine Control Module (ECM) uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to …, 1-year/40,000Km Warranty. In stock! Usually ships within 24 hours. $222.39 CAD $280.21 CAD. Overview. Additional Info. vehicle fitment. **PREMIUM DIRECT-FIT • HIGH QUALITY MATERIAL • OEM STYLE & PERFORMANCE**. DIRECT FIT CATALYTIC CONVERTER: Premium Quality Materials and Construction. , Jan 3, 2019 · Lexus IS250 and GS300 intake valve carbon fix/cleaning with walnut blasting Lexus IS250 and GS300 intake valve cleaning with walnut blasting... By John Cleveland | January 3rd, 2019 | GS300 , Lexus | Comments Off on 2006-2012 IS250, GS300, GS350 P0420, P0430 check engine light and/or car is loud – pinhole leak at y-pipe assembly , Here's how to modify your car's oxygen sensor to get rid of a P0420 OBDII code, clear the check engine light and pass an emissions test.The P0420 code is thr..., 2009 150k miles P0420 Code . Hey there! I have a 2009 Honda fit and recently my check engine light went on and I had to see a new mechanic (who genuinely seems trustworthy) and he said the cat probably needs to be replaced but they can try replacing the 02 sensor first to see if that works. ... [2010 Lexus IS250] Codes from scanner tool., An "over reporting" Mass Air Flow Sensor can be a common cause of a code P0172 and P0175. Essentially, this means that the Air Flow Sensor is telling the computer that much more air is entering the engine than actually is. Based on this large amount of air entering the engine, the engine computer or PCM sprays more fuel into the combustion ..., May 14, 2022 · Replacing the catalytic convertors, and exhaust system on the Lexus IS250 and IS350 requires removing the oxygen sensors. Normally taking out these sensors r... , Oct 24, 2012 · Lexus ES300: , have have a 2000 lexus Es300 alreay have hello, have have a 2000 lexus Es300 alreay have done alot of work on the car but still having problems, just went and have them put the machine on and more codes came up. p300,p031,po302,po303,,po305, … , Step 1 - Locate the oxygen sensor. The Lexus will have a bank 1 and a bank 2 O2 sensor: one is near the firewall and in front of the catalytic converter; the other is behind the converter closer to the rear. They should primarily be the same part, just different lengths of wiring. The bulb part is connected to the exhaust., Cost of diagnosing the P0420 code. P0420 is a diagnostic trouble code (DTC) for "Catalyst System Efficiency Below Threshold (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform ..., 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 ... , Subaru & Honda. If you find a P0420 code in your Subaru or Honda, it's most likely the catalytic converter to blame. It can also be caused by an exhaust leak or a bad oxygen sensor. Check for vacuum leaks or other fuel mixture-related engine codes. Check for any exhaust leaks before the catalytic converter., 2002 Lexus GS300 175K Miles Symptoms: (1) terrible gas mileage and (2) check engine light - pulled codes p0420 and p0430 I used a scantool application to pull the codes and monitored the OS 2 sensors' … read more, Wide-ranging upgrades have strengthened the appeal of the Lexus UX 300e, the urban crossover launched three years ago as Lexus’s first all-electric model. These revisions enable the UX 300e to go further between charges; raise the cabin’s aesthetic appeal, comfort, and convenience; and make the car – Lexus’s “Creative …, That’s the way it’s supposed to be. When the downstream sensor begins to switch at the same rate as the upstream sensor, the P0420/P0430 codes are stored by the PCM to flag the failure of the catalyst to store oxygen. P0430 vs. P0420. The P0430 code’s mirror image is P0420, which applies to the converter on bank 1., If you have a helper turn the warmed car on, the voltage should fluctuate and not sit at .2v (only when the car is cold will it momentary stay at .1 .2 volts-wide band around 5 volts). After 2 minutes or so, that sensor should fluctuate between .1 and .9v. The only other culprits are a bad cat or an exhaust leak., IS300 drive shaft. 1 / 1. Performance - IS300 2002 found a P0302 misfire cyl 2 - So, I have changed all spark plugs, wires, connectors, and coils. Ran into a little issue with a broken screw but JB weld fixed that. The car was running great 2 days after repair, then yesterday the engine came on. The Track is off., 3. Check The Gas Cap. A common cause of the VSC light on Lexus and Toyota if you see it along with a TRAC OFF light and a check engine light is a leaking or loose gas cap. If the VSC light came on after you refueled your car, you definitely want to make sure the gas cap is properly tightened., Something to note about the C1201 code is that it can often be paired with codes C1198-C1200, which specify the actual issue with the ABS inlet valve in the left front wheel. While C1201 reports ..., Dec 22, 2018 · Posted December 22, 2018. While driving on the motorway today my check engine light came on. Scanned the code and it reads: P0420 - Catalyst System Efficiency Below Threshold Bank 1. I have new Air/Fuel Oxygen sensors and have had them in the car for nearly a year now. , P0420 is a diagnostic trouble code (DTC) for "Catalyst System Efficiency Below Threshold (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. ... Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia Arrived early which was great ..., Labor: 1.0. To diagnose the P0057 Lexus 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., What is the Cost to Diagnose the Code P0393 Lexus? Labor: 1.0. The cost to diagnose the P0393 Lexus code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour., Here is a more detailed list of the signs of a bad or failing MAP sensor you should look for: 1. Check Engine Light. The engine control unit constantly monitors all the sensors in your car engine while you drive the car. If one of these sensors’ values is out of the specified range, the check engine light will show up., Received 60 Likes on 45 Posts. P0441 - Evaporative Emission Control System Incorrect Purge Flow What this means - The code lets you know that part of the EVAP system is not functioning properly. The EVAP system contains many different parts, for example the gas cap, vacuum lines, carbon canister, purge valve, etc., My Check engine light came on, So I went to Lexus and the ran a diagnostic on it and came back with a code error P0420 "Catalyst System Efficiency Below Threshold (Bank 1). They are telling me its because of the new exhaust. I have search on the forum and havent found much help. Does anyone know how to fix this?