Chevy trax p0171

If you drive an Buick Encore, Chevy Sonic or a Chevy Cruze and have these codes p015B p0171 p1101, check your purge valve and watch this video. Billy walks y...

https://gouldaero.com/ Automotive RepairsGM Ecotec 1.4L Turbo PCV fix1st gen Chevy Sonic, Cruze Encore, TraxNew cover from Amazon (25198874): http://amzn.to/...2017 Chevy Trax LT No Heat and P0171 Code. I own a 2017 Chevy Trax LT and when I put the heat on the highest level (4) there is no heat, but any level below that it works fine. ALSO, for the P0171 code, I did all the tests looking for a leak, I changed parts, and I have had no luck, the light is still on and the car still runs rough.Jun 25, 2021 ... If you have a 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, or 2019 Chevy Cruze or Chevy Sonic, and your engine is running rough and you ...A P0171 code is set by your vehicle’s powertrain control module (PCM) when it detects that the air-to-fuel ratio of your vehicle is too lean. This means that the PCM is relaying that …Oct 2, 2023 · One of the most common causes of the P0171 engine code is a fuel system leak. When your fuel system leaks, more air and less fuel will enter the engine's cylinders. This results in your engine running lean because it can't get the necessary amount of fuel. Another problem with the fuel system is clogged fuel injectors. 2015 Chevy cruze LT 1.4 code P0171. The car had a bad PCV valve so i have replaced the cover as well as the PCV hose and still have this code. Ive checked all the hoses and no leaks. The O2 sensor is functioning properly and the MAF sensor has also been replaced and the puel pressure reads 40-50 on the obd2 scanner. Im at a loss here. If this video was helpful, consider donating :) Paypal - https://paypal.me/chadwilliams89Cash App - https://cash.app/$chadwilliamsfixesallVenmo - https://www... Mar 25, 2021 · March 25, 2021 by Jason. P2270 is a general DTC trouble code, which means it has the same meaning for the Chevy Trax as it would any other vehicle. It means that the oxygen sensor located on bank 1 behind the catalytic converter is continuously sending voltage that indicates a lean air/fuel mixture. This does not necessarily mean that your Trax ...

Q: What is P0171 in Chevy Trax and why is it important? A: P0171 is a diagnostic trouble code that indicates a lean mixture condition in the engine of Chevy Trax vehicles. It is important to address this issue as soon as possible to prevent potential damage to the engine and to ensure optimal vehicle performance.P0171 System Too Lean Fix. PCV Hose Replacement 2.0t Cadillac ATS and Chevy Malibu 2013-2020. Diagnosing P0171 System too lean code. How to Remove and Replac...Oct 2, 2023 · One of the most common causes of the P0171 engine code is a fuel system leak. When your fuel system leaks, more air and less fuel will enter the engine's cylinders. This results in your engine running lean because it can't get the necessary amount of fuel. Another problem with the fuel system is clogged fuel injectors. 2011-2016 Cruze/Sonic/Trax 1.4L Turbo Intake Manifold PCV Check Valve Fix: ... The P0171 started to come back on within a couple of weeks of the new manifold going on, so if it failed again, it failed pretty quick. ... CruzeTalk.com forum, news, discussions and the best community for owners to discuss all things related to the …Vapor Canister Control Valve being replaced. The part is available for under $20 online or at select auto parts stores for around $45 to $60.In this video, I show you how I troubleshoot a Check Engine Light (CEL) / Diagnostic Trouble Code (DTC) P0171, System Too Lean Bank 1. The exact vehicle in ...I have the following codes on my Chevy Cruze. Codes P0507, P1101, P0171, P0106, P015b. I also have a recall on the vehicle and was wondering if the issue with the recall could be causing the codes. Also if the issue with the codes are covered under the powertrain warranty. Any info on the codes or insights to the issue is greatly appreciated.

#3 · Feb 19, 2024. spark plug wire insulation does not last 10 years without drying/degrading significantly - the sparks may be shorting to block through the old insulation. don't verify …24 posts · Joined 2015. #1 · Mar 11, 2021 (Edited) I am getting P0131, P0137, and P0171 codes on my 2015 Chevrolet Cruze. Data is as follows: Fuel Sys: CL. Calc Load: 18.4%.The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly 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.I have had local parts shop check the fault codes. OBD is showing primary fault code as P0171. primary DTC is showing fuel trim system lean. Mechanic's Assistant: Ok. Thanks for the info. The Chevrolet Mechanic can help with your 2019 Chevy Trax LS's P0171 code and symptoms of rough idle and starting difficulty.Q: What is P0171 in Chevy Trax and why is it important? A: P0171 is a diagnostic trouble code that indicates a lean mixture condition in the engine of Chevy Trax vehicles. It is important to address this issue as soon as possible to prevent potential damage to the engine and to ensure optimal vehicle performance.May 23, 2019 · A friend of mine has a 2013 Chevy Cruze (1.4L) with the following codes: P0171: System Too Lean (Bank 1) P015B: O2 sensor Delayed Response - Lean to Rich Bank 1 Sensor 1. P1101: Intake Air Flow System Performance. P2270: O2 Sensor Signal Stuck Lean - Bank 1\, Sensor 2. I need to ask him what symptoms he is experiencing (I think maybe some rough ...

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P0171-System too lean (bank 1) - has appeared multiple times. P015B - 02 sensor delayed response, lean to rich (bank 1 sensor 1). This is probably the most …Apr 15, 2023 ... In this video you will be watching of how to diagnose and fix a code of P0171 code for 2014 GM Chevy Cruze..Symptoms of this code car will ...When the P0171 code sets, the oxygen sensors are detecting too little oxygen in the exhaust (running "lean") and the control module is adding more fuel than normal to sustain the proper air/fuel mixture. Rich Mixture = Too much fuel, not enough air. Lean Mixture = Too much air, not enough fuel. Driving with this trouble code is not recommended.Jun 25, 2021 ... If you have a 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, or 2019 Chevy Cruze or Chevy Sonic, and your engine is running rough and you ...Nov 18, 2017 · 13 posts · Joined 2017. #1 · Nov 18, 2017. Hello Forum I am new to this forum. I have a 2016 Trax LS never had an issue except A/C Wife just had a CEL come on with (according to O'Reilly) code P0171 and P0131. the reader said it was for the 02 sensor b1 s1 however she received a note from onstar saying she had an issue with the ABS and ...

Buy YOUCANIC Pro Scanner https://www.youcanic.com/scanner/Get Factory Service Repair Manuals & Specs https://www.youcanic.com/manualsAsk Car Questions & Get ...Aug 21, 2022 · The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly 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. PO171 System Too Lean (Bank 1) I have had this code before. I purchased this 2018 Trax about 19 months ago and I love this car. Within the first six months, I had this code. I replaced both O2 sensors, which tested bad. I feel like I did not fix the cause, I fixed the result of the problem.P2227 P0097 P00F4 P0113 P2228 P0496 P0171. 2015 chevy trax. Nothing yet, we just got that list of codes so now - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website.2015+ Chevy Trax Tech Section. Engines and Technical Discussion. P0171 Surging in Cold Weather MAF sensor? Jump to Latest Follow 21 - 21 of 21 Posts. 1 2. C. chrismcus · Registered. 2017 Chevrolet Trax Joined Nov 28, 2020 · 15 Posts. Discussion starter · #21 ...In this video i will be showing you how to diagnose and fix a lean condition code (P0171) for 2013 Chevy TraxIf your Chevy Trax has the P0304 trouble code, you should know that it's about as common of a code as there is. It's a generic OBD IIcode (same meaning for all vehicles) that indicates that your vehicle’s fourth cylinder is misfiring. ... When your Trax has P0304 and P0171 together, it’s often caused by a clogged or underperforming fuel …Search for a new Chevy Trax near you. Choose from available trims, colors, and options to view photos and learn more about your next vehicle.Cómo resolver el código de falla P0171 en Chevy Trax: Guía completa de causas, diagnóstico y reparación. El código de falla P0171 en Chevy Trax puede ser un problema común que enfrentan los propietarios de este vehículo. Este código se refiere a una mezcla de aire y combustible demasiado pobre en el banco 1 del motor. Si no se resuelve ...

Refer to your vehicle’s service manual to locate and inspect the IAC valve for any signs of damage or malfunction. Clean or replace the valve if needed. 3. Check the throttle body: The throttle body can also be the cause of a P0507 code. Inspect the throttle body for any signs of damage or buildup of dirt and debris.

Dec 19, 2018 · Here are the most common symptoms of P0304 in the Chevy Trax. There may be no noticeable symptoms at all. Check engine light; Your vehicle may run rough, be down on power, and stall. Your Trax may produce excess vibration, especially at lower RPM. Fuel mileage may suffer. You may smell raw gas coming from the tailpipe. The engine may backfire. not our usual import customer today but thats ok! This video is to show you how we diagnosed and repaired the p0171, p1101 DTC and low power complaint on thi...P0106, P0171 & P1100 - Surging at idle. *FIXED* So I fixed my boost leak bought a couple new parts, did my serpentine belt. Fired the car up and it's been idling very rough. ... -or-fuel-trim-codes-2011-2019-buick-chevrolet PIP5197J [h=1]2011-2016 Cruze 1.4 PCV Valve Cover/Intake Manifold Issues[/h] I found this but did not watch it.Quick overview of the causes and fixes of a P00B7 engine error code on a Chevy Cruze.Read here for more information: https://www.backyardmechanic.org/causes-...P1101 Intake air flow system performance. P0171 (again) P0106 (again) P1101 (again) P0171 (3rd time) P1101 (3rd time) P015B 02 Sensor delayed response - lean to rich bank 1 sensor 1. P0420 Catalyst system low efficiency (bank 1) The suggested part from the paper is the Mass Air Flow Sensor.I have a 2012 Cruze eco 1.4L Turbo that just started running extremely rough all of a sudden and threw a bunch of codes. Vehicle idles and runs very rough, stalls, misfires, sputters, etc. Codes: P0301 - Cyl 1 misfire. P0601 - PCM read only memory (ROM) - checksum failure. Q: What is P0171 in Chevy Trax and why is it important? A: P0171 is a diagnostic trouble code that indicates a lean mixture condition in the engine of Chevy Trax vehicles. It is important to address this issue as soon as possible to prevent potential damage to the engine and to ensure optimal vehicle performance.

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3 posts · Joined 2021. #17 · Jun 4, 2021. Hello, I’m having issues with my P0299 code on my 2015 Buick Encore (I know it’s not Chevy Trax but the people posting seem to have knowledge on what’s going on). I first got the code and pulled the turbo and there was a crack on the inside of the turbo, obviously bad.Notice that in this diagram, O2 sensor 1/1 is the upstream sensor on Bank 1 (different for a Ford than for a Chevy or a Dodge), and O2 sensor 1/2 is the downstream sensor on Bank 1. O2 2/1 is upstream on Bank 2 and O2 2/2 is downstream on Bank 2. Front wheel drive vehicles can be even more confusing, but when you find cylinder #1 …If you have a 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, or 2019 Chevy Cruze or Chevy Sonic, and your engine is running rough and you have a check engin...Traxy. OEM isn't Bosch it's ACDelco I believe, but don't quote me on that. P0420 Engine Controls and Fuel Catalyst low efficiency. If it was one of the HO² sensors it would have set a specific code for that particular sensor. P0420 is very hard to diagnose. It could be as simple as a dirty air filter to a bad CAT.Chevrolet Cruze 2016 2019 1.4L (RPO LE2) Equinox 2018 2020 1.5L (RPO LYX) Malibu 2016 2020 1.5L (RPO LFV) Trax 2019 2019 1.4L (RPO LE2) Volt 2016 2019 1.5L (RPO L3A) GMC Terrain 2018 2020 1.5L (RPO LYX) Involved Region or Country North America, China, Thailand, GM Korea, Middle East, Israel, Europe, Brazil, Chile, Colombia, Peru, South Africa ...Trax 2019 2019 1.4L (RPO LE2) Volt 2016 2019 1.5L (RPO L3A) GMC Terrain 2018 2020 1.5L (RPO LYX) Involved Region or Country North America, China, Thailand, GM Korea, Middle East, Israel, Europe, Brazil, Chile, Colombia, Peru, South Africa Condition Some customers may comment on one or more of the following conditions: • Oil Leak • MIL ...#1 · Dec 30, 2021. I recently noticed the check engine light was on, and when I checked the code I got a P0171 code. I have had this car for about two years now and this has not happened. I ran all the tests on the PCV …P0401: Faulty EGR (Exhaust Gas Recirculation) valve. P0455, P0446, P0442, P0440, or P0411: Problem with the evaporative system. P0305 or P0300: Engine misfires. P0175 or P0171: Faulty oxygen sensor. While these are the most common codes that the 7E8 engine code menu shows, they aren’t the only ones that the menu can have.Chevy Mechanic: Daniel Chaidez. Understood. If there was sludge in the engine then there is a good chance that the turbo was damaged unfortunately. See the turbo is fed high pressure oil to keep it cooled and lubricated and if the oil was broken down or sludged this damaged the turbo.Cómo resolver el código de falla P0171 en Chevy Trax: Guía completa de causas, diagnóstico y reparación. El código de falla P0171 en Chevy Trax puede ser un problema común que enfrentan los propietarios de este vehículo. Este código se refiere a una mezcla de aire y combustible demasiado pobre en el banco 1 del motor. Si no se resuelve ...For the last 2 weeks I keep getting this code and cant find the source of it. It can not be the MAF, Dirty Air filter, Upstream and Downstream o2 sensors, or even the … ….

The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is highly 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.The forthcoming Chevy Bolt and expected improvements in the Nissan Leaf will provide electric car owners with greatly increased driving range at affordable prices. By clicking "TRY...May 23, 2019 · A friend of mine has a 2013 Chevy Cruze (1.4L) with the following codes: P0171: System Too Lean (Bank 1) P015B: O2 sensor Delayed Response - Lean to Rich Bank 1 Sensor 1. P1101: Intake Air Flow System Performance. P2270: O2 Sensor Signal Stuck Lean - Bank 1\, Sensor 2. I need to ask him what symptoms he is experiencing (I think maybe some rough ... For the last 2 weeks I keep getting this code and cant find the source of it. It can not be the MAF, Dirty Air filter, Upstream and Downstream o2 sensors, or even the spark plugs and coil pack. They have all been replaced. I also had a crack in the exhaust system that was repaired.Jun 25, 2021 ... If you have a 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, or 2019 Chevy Cruze or Chevy Sonic, and your engine is running rough and you ...The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the …Bad spark plugs – Code P0304 is typically caused by bad spark plugs. Newer Chevy models are built using long-lasting iridium spark plugs but the plugs can still go bad over time. If your vehicle is running with bad plugs, the cylinders won’t get enough power to properly fire, leading to a P0304 code. Faulty spark plug wires – If your ...May 9, 2021 · I have the following codes on my Chevy Cruze. Codes P0507, P1101, P0171, P0106, P015b. I also have a recall on the vehicle and was wondering if the issue with the recall could be causing the codes. Also if the issue with the codes are covered under the powertrain warranty. Any info on the codes or insights to the issue is greatly appreciated. not our usual import customer today but thats ok! This video is to show you how we diagnosed and repaired the p0171, p1101 DTC and low power complaint on thi...I have the following problem. My 2018 Trax has the check engine light on, with the referred DTC´s P01710-00 / U0401-71. Investigating a bit, I found that it might be the MAF sensor, so I cleaned it and later replaced it. Although the shutter seems to be improved a little bit, the check engine came on again, and the shuttering won´t completely ... Chevy trax p0171, One of the most commonly reported issues for the Trax is fault code P0171. This code indicates that the engine is running too lean. This can be a tough code to fix because pinpointing the cause is notoriously difficult. Unfortunately, owners have not reported a common cause for the Trax, meaning it can be almost anything that affects the air ..., P0171-System too lean (bank 1) - has appeared multiple times. P015B - 02 sensor delayed response, lean to rich (bank 1 sensor 1). This is probably the most …, May 15, 2017 ... ... Chevy #Trax. ... Chevy Trax 1.4L P0300, P0171, P0496, P1101 Diag and Repair Using XTOOL A80 Pro Master., Sep 30, 2016 ... Chevy Cruze P0171 - Rough Idle - Stalling - Possible Fixes For Diyer's ... | Chevy Trax P0171, P1101, P0420. Watch Wes Work•711K views · 11:06., CODE P0171 EXPLAINED ON CHEVY, CHEVROLET, GMC, BUICK, CADILLAC ENGINE LIGHT ON Great Car Scanner: https://amzn.to/2QmNBri Check out our Amazon Store for t..., Oct 30, 2023 ... In this video we replace the faulty purge valve on a Chevy Trax ... 2016 Buick Encore GM 1.4 Turbo P0171 P0496 Diagnosis - Purge Valve Replacement ..., Dec 29, 2021 · 2017 Chevy Trax LT No Heat and P0171 Code. I own a 2017 Chevy Trax LT and when I put the heat on the highest level (4) there is no heat, but any level below that it works fine. ALSO, for the P0171 code, I did all the tests looking for a leak, I changed parts, and I have had no luck, the light is still on and the car still runs rough. , It came back De-ice air intake system (P0171) Power train system. System to lean. This is the second time I've had this happen. ... 2016 Chevy Trax, 1.4L - Check engine light is on, and mechanic said it is due to moisture in the Turbo and it will have to be rebuilt. I'm in Minnesota, and my car is outside, just went through extrem ..., Gm’s 1.4L turbocharged 4-cylinder engine, commonly found in the Chevy Sonic, Cruze and Buick Encore, has a well-known issue resulting in a lean code, P0171, ..., Apr 15, 2023 ... In this video you will be watching of how to diagnose and fix a code of P0171 code for 2014 GM Chevy Cruze..Symptoms of this code car will ..., Fuel Injectors. P0171 indicates that your Chevy Traverse is either getting too much air or not enough fuel. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. You may see a cylinder misfire code or fuel injector-specific code with P0171., #3 · Feb 19, 2024. spark plug wire insulation does not last 10 years without drying/degrading significantly - the sparks may be shorting to block through the old insulation. don't verify …, In this video we take a look at a 2015 Chevy Trax with a CEL complaint and the following code... P0496-Flow during non-purge. Let's get this thing fixed!, CODE P0171 EXPLAINED ON CHEVY, CHEVROLET, GMC, BUICK, CADILLAC ENGINE LIGHT ON Great Car Scanner: https://amzn.to/2QmNBri Check out our Amazon Store for t..., P0420 Diagnosis: Chevy Trax. The most common fix for P0420 in the Chevy Trax is a new catalytic converter, followed by an O2 sensor replacement. Before taking your Trax 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 Chevy Trax: …, 2849 posts · Joined 2017. #4 · Apr 14, 2021 (Edited) You've addressed the 2 most common cause for that lean code. Some people on here claim to have solved this code accidentally when they replaced their car battery. So even a failing or bad battery can cause this code to pop up. P0171 is more annoying than a mosquito near your ear., P0300 indicates that your Trax’s engine is misfiring, but it can’t detect which cylinder it’s coming from. This code is often thrown when there is a fuel issue, a timing issue, and not just bad ignition components (most likely). Cylinder Specific Misfire. The plug on the left was causing the check engine light to flash and threw a ..., Cruze chevy p0171 vehiclehistory threw attention needs P0171 lean 1aauto Chevy trax / cruze / buick encore valve cover replacement. Spark cruze lean p0171. Cruze chevy calibratingBmw x3 lean bank 1 and 2 Cruze chevy p0171 p1101 chevrolet code p0106 engine eco forumsCode chevy cruze p0171. My 2016 chevy cruze limited is …, 28 posts · Joined 2024. #3 · Feb 19, 2024. spark plug wire insulation does not last 10 years without drying/degrading significantly - the sparks may be shorting to block through the old insulation. don't verify it by touching the wire while engine is running. In 100% darkness with hood open and engine running you may be able to see the arcing ..., Chevrolet Cruze 2016 2019 1.4L (RPO LE2) Equinox 2018 2020 1.5L (RPO LYX) Malibu 2016 2020 1.5L (RPO LFV) Trax 2019 2019 1.4L (RPO LE2) Volt 2016 2019 1.5L (RPO L3A) GMC Terrain 2018 2020 1.5L (RPO LYX) Involved Region or Country North America, China, Thailand, GM Korea, Middle East, Israel, Europe, Brazil, Chile, Colombia, Peru, South Africa ..., In a nutshell, P0171 implies “System Too Lean (Bank 1)”, signaling the excessive presence of air in the engine’s fuel mix. It’s like feeding the vehicle a diet of ‘air sandwiches,’ choking its power generation and decreasing its overall fuel efficiency. The key culprits behind this lean engine condition can be grouped into three ..., P0171 is a hard one to chase. Make sure your filter is clean and MAF before you start changing parts. Never drive faster than your guardian angel can fly!!! Drives 2022 Red Tesla Model Y. Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716. This is an older thread, you may not receive a response, and …, P2227 P0097 P00F4 P0113 P2228 P0496 P0171. 2015 chevy trax. Nothing yet, we just got that list of codes so now - Answered by a verified Chevy Mechanic. We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have …, To diagnose the P0171 Chevrolet 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., If you have a 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, or 2019 Chevy Cruze or Chevy Sonic, and your engine is running rough and you have a check engin..., Chevy Trax P0496 Meaning. P0496 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing. The code technically stands for: The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal …, P0171 definition: Bank 1 has too much air or not enough fuel. Issue Severity: MODERATE– Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid damage to spark plugs, pistons, and catalytic converters. Diagnosis: It is important to complete the entire diagnostic ..., I have the following codes on my Chevy Cruze. Codes P0507, P1101, P0171, P0106, P015b. I also have a recall on the vehicle and was wondering if the issue with the recall could be causing the codes. Also if the issue with the codes are covered under the powertrain warranty. Any info on the codes or insights to the issue is greatly appreciated., Oct 30, 2023 ... In this video we replace the faulty purge valve on a Chevy Trax ... 2016 Buick Encore GM 1.4 Turbo P0171 P0496 Diagnosis - Purge Valve Replacement ..., 24 posts · Joined 2015. #1 · Mar 11, 2021 (Edited) I am getting P0131, P0137, and P0171 codes on my 2015 Chevrolet Cruze. Data is as follows: Fuel Sys: CL. Calc Load: 18.4%., If your Chevy Trax is jerking when you press the accelerator, a few common issues can cause this. This guide is built to help you get a better idea as to why your vehicle is jerking. ... P0171 or P0172 (too rich or too lean). There are a ton of 02 sensor codes: A lean or rich air-fuel mixture is usually caused by a bad O2 sensor or MAP/MAF ..., You've addressed the 2 most common cause for that lean code. Some people on here claim to have solved this code accidentally when they replaced their car …, 1. Replace the exhaust front pipe and the warm up three-way catalytic converter. NOTE: A new converter with less than 100mi on it may set the P0420 DTC due to outgassing of the internal matting. Operating the vehicle at highway speeds for approximately 1 hour may correct the condition."