Code p0420 nissan sentra

OBD II fault code P0420 is a generic code that is defined as ““Catalytic Converter System Bank 1, Efficiency below Threshold”, and is set when the PCM …

Code p0420 nissan sentra. To diagnose the P0420 2005 Nissan Pathfinder 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.

P0420 2011 Nissan Sentra Code - Catalyst System Efficiency Below Threshold Bank 1 - Code Popularity: 16,789 Views - Repair Importance Level: 2/3 - Repair Difficulty Level: 2/3. Table of contents. Created and updated by William Orellana on Aug 20, 2020. Possible Causes; Tech Notes;

To diagnose the P0420 2004 Nissan Sentra 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.Apr 3, 2018 ... Comments511 ; How to fix P0420 code with non Fowlers (cheap & easy). MightyMotors207 · 60K views ; Fix your Catalytic Converter for $10? Mike The .....My 2000 nissan sentra GXE "service engine soon" light turned on in january(69720 mile). I checked it up by dealer. They told me some o2 sensor was wrong. here is the report. P0420 Tw catalyst system B2. Catalytic convertor function failure. Front and rear o2 sensors for B1. Rear o2 sensor b1 response is like front o2 sensor b1 reading.I have read a lot about the code and from what I read the O2 is a cheap start that may fix it. Read that cat can be 95% efficient and throw this code. But cat could be bad. Also read about using o2 simulator from O2 Simulator, Angled O2 Simulator clears p0420 / p0430 check engine light But it be a cheap fix vs a new cat.Obd Scanner Abs Codes And P0430 P0420 and P0430 P0420 means Catalyst System Efficiency Below Threshold, Bank 1 P0430 manner Catalyst System Efficiency Below ... 12 airbag errors code for Nissan Sentra and feasible motive of 12 srs is Internal Electronic Control Module (ECM) fault. Twitter feed is not available at the moment.Apr 5, 2022 ... ... codes from any system, module, control unit including engine, transmission, airbag, ABS, traction control, climate control, blind spot ...

989 posts · Joined 2006. #8 · Mar 5, 2010. No the p0420 code is for the catalyst control being below threshold. In other words temp not hot enough cat is screwed possible engine damage to follow very soon get it fixed. 2 dollar part wil lnot fix this problem just because the little light went out doesn't mean that engine damage has not ...Nov 10, 2018 · P0101 Code Definition. MAF Sensor – Circuit (Range/Performance) The P0101 code indicates to an issue with the Mass Air Flow (MAF) sensor in your Nissan Sentra. It’s a generic code, which means it has the same definition for your car as it would any other vehicle. This diagnostic trouble code is triggered when the Engine Control Module (ECM ... I just installed a new downstream O2 sensor and still getting the P0420 code. My gas mileage is still about the same and no power difference from before the check engine light come on. I’m still getting 36-40 mpg. I run a scan tool “OBD Monitor Test” this morning while going to work and got out of value results for Module $7E8 TID $80 & $82.2004 nissan sentra: p0420..fault code clear code comes..comes back. 2004 nissan sentra setting p0420 cat effic below threshold [ bank 1] ...Code P0420 Description. 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. The second sensor, the heated oxygen sensor, sends post-catalyst information to …Oct 6, 2010 · I have a 2003 Nissan Sentra 1.8l that keeps throwing a code P0420 about every 50-75 miles of driving.What is the most - Answered by a verified Nissan Mechanic We use cookies to give you the best possible experience on our website.

The dead cat codes, P0420 and P0430 no longer registered. The engine ran very well, idled smoothly and could rev to 6k rpm. ... Very curious I have 2012 nissan frontier pro4x 4.0 v6 manual 6 speed transmission and clutch went out on my way to work called car lot they towed it in and replaced the clutch. Not even 24 hours passed and on …Let's start with the basics of my car. I bought my 1997 Nissan Sentra 1.6 GXE used about a year ago from Craigslist. It had 168,000 miles and there was a few mechanical fixes to work on. I completed those all and currently the car is sitting at 181,000 miles. ... When a P0420 code comes up the first thing to do is look at the O2 sensors' live ...P0420is a OBDII trouble code. The code technically stands for: Catalyst System Efficiency Below Threshold Your Sentra has at least two oxygen sensors, one before and after the catalytic converter. Among the many jobs that oxygen sensors have is they have to measure the emissions levels coming in and … See moreThe code was P0420. ... Mass Air Flow Sensor 2000 Nissan Sentra - Parts - Compare Prices, Reviews and Buy at NexTag - Price - ReviewDo you need to Replace the oxygen sensor on your Nissan Sentra (2007 - 2012) but don't know where to start? This video tutorial shows you step-by-step how to...Nov 10, 2018 · P0101 Code Definition. MAF Sensor – Circuit (Range/Performance) The P0101 code indicates to an issue with the Mass Air Flow (MAF) sensor in your Nissan Sentra. It’s a generic code, which means it has the same definition for your car as it would any other vehicle. This diagnostic trouble code is triggered when the Engine Control Module (ECM ...

Jostens order lookup.

Nissan Sentra, Pulsar, NX, B14 200SX. 5th Generation Sentra (2000–2006) 04 sentra 1.8L Catalytic Converter help ... Most of the time when a P0420 or P0430 code is triggered, it is usually due to an inefficient converter (the one located between the front and rear sensors) and it needs to be replaced. The only way to be certain is to follow ...What is wrong when this code shows up p0420 shows up..This is a 2006 nissan sentra P0420 NISSAN - Catalytic Converter Efficiency Below Threshold Bank 1 The most common cause for the OBDII code P0420 on Nissan vehicles is the three way catalytic converter Bank 1 has reached the end of its useful life..NSANF: Get the latest Nissan Motor stock price and detailed information including NSANF news, historical charts and realtime prices. Indices Commodities Currencies StocksJun 16, 2017 ... 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!Hi, It is quite concerning that your 1998 Nissan Sentra has been experiencing power issues and has now stalled and will not start. The P0420 code indicates a problem with the catalytic converter, which can affect engine performance if not addressed. However, the stalling and no-start condition suggest a more serious issue.Good morning, Quartz readers! Good morning, Quartz readers! Nissan’s board votes on a motion to remove Carlos Ghosn. The carmaker’s directors are reportedly divided about dismissin...

Dec 21, 2012 ... Comments1.7K · EricTheCarGuy Explains Check Engine Codes - P0420 Catalyst System Efficiency Below Threshold · Fix your Catalytic Converter for $10&nb...P1148 Nissan Code: The Secret to Unlocking Your Car’s Full Potential! P1778 Nissan Code: Unlocking the Secret to Your Car’s Performance! Nissan Leaf Charging Problems: 5 Possible Charging Issues; P1701 Nissan Code Unlocked: Get Ready to Rev Your Engine! 4 Nissan Rogue Transmission Problems & How To Avoid ThemIntake Air Leaks. Faulty Oxygen (O2) Sensor. Faulty Fuel injector (s) Leaking Fuel Injector (s) Faulty Spark plugs. Improper Ignition Timing. Faulty Engine Control Module (ECM) …P0302 in the Nissan Sentra is a common OBD II trouble code. It indicates that your car’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 Sentra’s check engine light to come on, you shouldn’t drive your car at all. Repairing P0302 should be ...Labor: 1.0. To diagnose the P0717 Nissan 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.NSANF: Get the latest Nissan Motor stock price and detailed information including NSANF news, historical charts and realtime prices. Indices Commodities Currencies StocksA starter that is not working correctly can really ruin your day. If your starter is making a grinding noise or is not responding when you turn the key, it is time to remove it, ha...How to fix a Nissan P0448 engine code: Evaporative Emission Control System Vent Control Circuit Shorted.Possible Causes of a Nissan P0448 Code:Vent Valve Cha...Seguro de Auto Barato: https://www.youtube.com/watch?v=jha7mvd7mtAEn esta video te diremos el significado del código P0420 en el tablero de tu auto Nissan.Te...Aug 20, 2020 · To diagnose the P0420 2004 Nissan Sentra 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.

Tech Notes. As the code description implies, the P0420 code means that the vehicle's Engine Control Module (ECM) has detected that the Three-way Catalyst Converter is not working properly (it is not as efficient as the factory expects). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases, the Three-way Catalyst ...

Esta página está pensada para ayudarte a solucionar los problemas de Código de avería P0420 del Nissan Sentra. Cubre el significado de Nissan Sentra P0420, los síntomas, las causas y las posibles soluciones. En el Sentra, el OBDII P0420 suele estar causado por un sensor de oxígeno defectuoso, pero también puede haber otras causas.Oct 12, 2021 · Maintenance/Repairs. catalytic-converters, sentra, diagnostics, nissan. mkluza98_177643 October 12, 2021, 8:48pm 1. I have a 2011 Nissan Sentra. It has had the following codes for 1.5 to 2years. Primary DTC P0420. Secondary DTC P0430. Catalytic converter below threshold bank 1. I feel no loss in power. P0101 Code Definition. MAF Sensor – Circuit (Range/Performance) The P0101 code indicates to an issue with the Mass Air Flow (MAF) sensor in your Nissan Sentra. It’s a generic code, which means it has the same definition for your car as it would any other vehicle. This diagnostic trouble code is triggered when the Engine Control Module (ECM ...Good morning, Quartz readers! Good morning, Quartz readers! Nissan’s board votes on a motion to remove Carlos Ghosn. The carmaker’s directors are reportedly divided about dismissin...Two places I called they told me I need to ask my mechanic if my Nissan Sentra 2008 is compatible. I recently went to get a car inspection and I didn't pass because of code P0420 - Catalyst System Efficiency. ... Keep in mind that the code P0420 can get triggered due to other issues than the catalytic converter. So, it is important to figure ...46.5K subscribers. 921. 82K views 10 months ago. How To Fix a Nissan P0420 engine code: Catalyst System Efficiency Below Threshold Bank 1 Link to …My 2006 Frontier LE (Manual, 168k miles, well maintained) has been displaying P0420 / P0430 codes for more than a year. It's sporadic at best...sometimes it happens on the return trip home after everything is fully warmed up. I live in a hilly area and there doesn't appear to any consistent cause (I'm at normal / steady throttle going up hills ...The Post Oxygen sensor is placed to monitor the efficiency of this cat. Each exhaust manifold is considered a bank. Bank 1 and Bank 2. 4 cyclinders contain one bank. On each bank is usually 2 oxygen sensors, the first being the furthest to the block. P0420 refers to bank 1 sensor 2 (downstream sensor). There are certain measurements that the ... 2002 Nissan Sentra P0430 Code. ... Can Too Much Back Pressure Caused By A New Midpipe Cause A False P0420 Code? Asked by Anonymous ...

Los cantaritos authentic mexican restaurant.

Foundry lake havasu.

Faulty Three-way Catalyst Converter Bank 1. Exhaust Tube. Intake Air Leaks. Faulty Oxygen (O2) Sensor. Faulty Fuel injector (s) Leaking Fuel Injector (s) Faulty Spark …P0420 2008 Nissan Sentra - 0 votes . 205 views. asked Dec 8, 2017 by joseph. I was wondering if o2 sensors go out a lot on a 2008 Nissan sentra. Vehicle: 2008 Nissan sentra 2.0 nissan; ... All OBDII Codes - Top 25 Codes - Latest Codes - All OBDII Codes - Powertrain (P) Codes - Network (U) Codes - Body (B) Codes - Chassis (C) …Jan 20, 2018 ... This 2005 Nissan Xterra runs great, except for that pesky Check Engine light is on! In this case we have a classic P0430 - "Catalyst ...2005 Nissan Sentra 1.8S Automatic transmission 2006 Jeep Liberty CRD Several GMT400 6.5 diesels 94 to 98 - About the only thing I know how to work on a little. ... I didn’t care about the P0420 code …I thought it was only emissions. The code IS for emissions, but it can ALSO mean other problems exist too! I’ll explain later.Faulty Three-way Catalyst Converter Bank 1. Exhaust Tube. Intake Air Leaks. Faulty Oxygen (O2) Sensor. Faulty Fuel injector (s) Leaking Fuel Injector (s) …P0420 is set when the switching rate of the primary cat downstream O2 sensor approaches the switching rate of the primary cat upstream O2 sensor, on the passenger side exhaust. What this means is that the oxygen storage capacity of the cat is low. This can mean a bad cat, especially with 160K miles.Beim Ersetzen der Sauerstoffsensoren (O2) wird der Code manchmal korrigiert. In den meisten Fällen muss jedoch der Katalysator ausgetauscht werden, um das Problem zu beheben. Wenn der P0420-Code mit anderen Codes kombiniert wird, versuchen Sie zunächst, die anderen Codes zu korrigieren. Sehr häufiges Problem bei Nissan-Fahrzeugen.Good morning, Quartz readers! Good morning, Quartz readers! Nissan’s board votes on a motion to remove Carlos Ghosn. The carmaker’s directors are reportedly divided about dismissin...1087 posts · Joined 2009. #4 · Feb 16, 2012. if you got a P0420 code, there are a few reasons. -Bad O2 Sensor. -Bad Cat. -Bad ECM program. Im not sure what are the ways to test it. if you are able to take off the pre-cat, take a look in the internal. If there are little metal powder or pieces inside...then it is shot.This trouble code references a number that is given to you when you plug your Sentra into an OBDII scanner. P0456 Indicates that there is a small leak in the evaporative emission control system. It often appears with or is related to other codes, such as P0420, P0441, and very often P0440. P0456 is normally not an immediate threat to the ...Jan 18, 2016 · Hello all, I'm getting a "P0420 NISSAN - Catalyst System Efficiency Below Threshold Bank 1" code and light from my 2007 Nissan Sentra 2.0S. I've had this light on and off for the past 4 months or so. I've done some reading on this code, and it sounds like it could be the catalytic converter. I am a complete Newbie when it comes to maintaining cars. ….

Nissan Sentra 2004 Code P0420. 2 posts • Page 1 of 1. carpi Posts: 1 Joined: Thu Mar 06, 2008 4:13 pm. Nissan Sentra 2004 Code P0420. Post by carpi » Thu Mar 06, 2008 4:25 pm.A Nissan Sentra “service engine soon” light can come on for many reasons, including a loosened gas cap. If the “service engine soon” light stays on, it can indicate problems that n... Puede haber varias causas para la aparición de un código DTC P0420 Nissan en un vehículo. Existen diversas razones posibles, tales como: Convertidor catalítico de tres vías defectuoso en el banco 1. Tubo de escape. Fugas de aire de admisión. Sensor de oxígeno (O2) defectuoso. Inyector (es) de combustible defectuoso (s) Ghosn's arrest has drawn worldwide scrutiny to a judicial system heavily stacked against anyone accused of a crime. Japanese prosecutors indicted Nissan’s ousted chairman Carlos Gh...I have a 2004 Nissan Sentra SER with the P0420 code, is it safe to drive for 6 months? asked Nov 3, 2018 by anonymous. nissan; sentra; p0420; 35.5k questions 32.3k ...The Nissan Sentra has come a long way since its inception in the early 1980s. Originally introduced as a compact sedan, the Sentra quickly gained popularity for its reliability, fu...Obd Scanner Abs Codes And P0430 P0420 and P0430 P0420 means Catalyst System Efficiency Below Threshold, Bank 1 P0430 manner Catalyst System Efficiency Below ... 12 airbag errors code for Nissan Sentra and feasible motive of 12 srs is Internal Electronic Control Module (ECM) fault. Twitter feed is not available at the moment.S. sspeed Discussion starter. 16 posts · Joined 2008. #1 · Oct 5, 2008. 2000 Nissan Sentra GXE, getting two codes: P0420 - Catalyst System Efficiency Below Threshold (Bank 1) P0430 - Catalyst System Efficiency Below Threshold (Bank 2) I read a lot of the archives on this, and most of it relates to pre-cat failure, but most are Spec V owners. Code p0420 nissan sentra, Labor: 1.0. To diagnose the P0442 Nissan 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., Description. Battery voltage is supplied to the Engine Control Module even when the ignition switch is turned OFF for the ECM memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc.P0603 Nissan Code - Engine Control Module Power Supply Circuit, Gutted cats need a mod on the downstream O2 sensors to fool the ECU to not print the P0420/P0430 codes. 06 Nismo 6M 4X4 Blue. Save Share. Like. T. ... Nissan Frontier Forum. 1.9M posts 114.1K members Since 2005 Welcome to our Nissan Frontier Forum! A premier community to share your mods and builds., The P0420 code is a common diagnostic trouble code (DTC) that appears in Nissan Sentra vehicles. It specifically refers to a problem with the catalytic converter …, 2002 Nissan Sentra P0430 Code. ... Can Too Much Back Pressure Caused By A New Midpipe Cause A False P0420 Code? Asked by Anonymous ... , Welcome to Mechanics News! In this article, we will be diving into the mysterious world of the P0420 code in Nissan Sentra. Code P0420 is a common issue that many Nissan Sentra owners encounter, causing their check engine light to illuminate. We will explore what this code means, its potential causes, and possible solutions to resolve it., I have a 2000 Nissan sentra 1.8l and a week ago I put a new maf sensor it cleared my p0171 and car is running fine again now some days later I got a p0420 code anybody got any ideas, I'm thinking it's the cat if it is I'm just gonna change out the headers and be done with the catalytic converter altogether. Sent from AutoGuide.com Free App, P0420 is a catalytic converter failure. You can drive the car with a failed cat. If your state requires functioning emissions equipment, you'll need a new converter. If you're in California, you'll need to buy an OEM converter (3-4x more expensive). 1. Reply. Welldonegoodshow • 7 yr. ago., May 18, 2019 ... Diagnosis and replacement of a Catalytic Converter on a 2006 Nissan Altima 2.5L which had a P0420 code (Low Catalytic Efficiency) ..., code P0420 and code P0430 Post by RDICK52 » Sun Oct 07, 2007 1:54 pm ( 2000 Nissan Sentra GXE 1.8 ) I replaced missfiring coil, cylinder #3, with and after market part., Oct 6, 2010 · I have a 2003 Nissan Sentra 1.8l that keeps throwing a code P0420 about every 50-75 miles of driving.What is the most - Answered by a verified Nissan Mechanic We use cookies to give you the best possible experience on our website. , code p0420. MR20DE . ... My sentra 2.0 sl (MR20DE) is throwing p0420. My mileage is at 103k and nissan dealer says its past warranty for catalytic converts. I have sulfur smelling exhaust, burning oil and gas mileage gone down. ... A forum community dedicated to Nissan Sentra B15U and B16U owners and enthusiasts. Come join the …, To diagnose the P0420 2004 Nissan Sentra 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., Aug 20, 2020 · To diagnose the P0420 2002 Nissan Sentra 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 have a 2009 Sentra 2.0 that kicked out a P0420 code. The car starts and runs fine with no adverse symptoms. A few months ago I replaced the valve cover gaskets and spark plugs because the #4 spark plug tube seal was leaking oil and it tripped a misfire code. I caught that problem very early and corrected it., Nov 13, 2018 · The most common fix for P0430 in the Nissan Sentra is a new catalytic converter, followed by replacing the Oxygen sensor. Before taking your Sentra 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 Nissan Sentra: 1. Check for Other Codes. , Nissan’s newest model was inspired by one of the most iconic designs in aeronautics: the swept wing. Nissan’s newest model was inspired by one of the most iconic designs in aeronau..., 2002 Nissan Sentra 1.8LComplaint: vehicle runs rough during idle.Music created by: "THE LUFFLIFE", The cost to diagnose the P0420 2006 Nissan Sentra 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., To diagnose the P0420 2004 Nissan Sentra 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., I just installed a new downstream O2 sensor and still getting the P0420 code. My gas mileage is still about the same and no power difference from before the check engine light come on. I’m still getting 36-40 mpg. I run a scan tool “OBD Monitor Test” this morning while going to work and got out of value results for Module $7E8 TID $80 & $82., When it comes to choosing a reliable and safe vehicle, the Nissan Sentra is a top contender. With its sleek design and advanced technology, this compact sedan offers an array of sa..., How to fix a Nissan P0448 engine code: Evaporative Emission Control System Vent Control Circuit Shorted.Possible Causes of a Nissan P0448 Code:Vent Valve Cha..., Bay Area-based AI startup Symbio today announced its “official launch.” Backed by a total of $30 million in funding, the company has struck deals with both Nissan and Toyota to imp..., To diagnose the P0420 2011 Nissan Sentra 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., Once you have identified and resolved the underlying issue causing the P0101 code in your Nissan Sentra, it is essential to clear the code and reset the Check Engine Light. Here’s how to do it: Step 1: Use an OBD-II scanner to connect to the vehicle’s OBD port. These scanners can read and clear diagnostic trouble codes., The most common fix for P0420 in the Nissan Titan is a new catalytic converter, followed by an O2 sensor replacement. Before taking your Titan 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 Nissan Titan: 1. Check for Other Codes., P0420 and P0430 Codes - 2006 Frontier. Tags catalytic convertor p0420 p0430. Jump to Latest Follow ... Nissan Forums is the go to place to talk about your favorite Nissan model, including the Rogue, Maxima, Altima and even sports cars like the 370Z and 200SX. Show Less ., P0420is a OBDII trouble code. The code technically stands for: Catalyst System Efficiency Below Threshold Your Sentra has at least two oxygen sensors, one before and after the catalytic converter. Among the many jobs that oxygen sensors have is they have to measure the emissions levels coming in and … See more, B15 2000-2006 Nissan Sentra Discussion (SE-R / Spe. Codes P0300 and P0420. Jump to Latest Follow 13K ... Yeah I know offhand P0420 is cat code, prob broken down so that's why o2 isn't reading correctly since cat isn't doing the job., P0401 is a very common OBDII trouble code that'll pop up in the Nissan Sentra. It has to do with the emissions system and stands for Exhaust Gas Recirculation (EGR)→ Insufficient Flow. ... P0401 will not affect the way your Sentra runs. Related: P0420 Nissan Sentra. Nissan Sentra P0401 Symptoms. Most of the time, there will not be …, Oct 6, 2009 · Category: Nissan. Satisfied Customers: 39,518. Experience: Nissan factory trained and Certified Subaru Technician. Verified. HI theere! The code P0420 is for the converter. It means the converter cannot store enough O2. You will need to have it replaced. If you are under 80k it might still be covered under warranty. , P0420, Cat issues. I have a 1.8S used as a commuter car. It popped a P0420 code back in February. The SES light has been on ever since. I thought it was still under the emissions warranty but Nissan told me otherwise. They wanted $800.00 to replace the downstream cat. I had a local shop do it cheaper. Code popped back on after 70 miles.