Chevy trax p0171

Dec 19, 2018 · Here are the most common symptoms of P0303 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.

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.P0171 fuel trim system lean. Chevrolet Trax 2016 52000 miles. Check engine light Loses power Code P0171. Check engine light is on and now the traction light is on. Car runs rough when stopped and it loses power when accelerating form a stop and going up hills. Code reads P0171 fuel trim system lean DTC severity 2-3.June 5, 2023 by Jason. The P0131 code is an OBD-II diagnostic trouble code that indicates low voltage in the Chevy Trax’s Oxygen (O2) sensor circuit for Bank 1, Sensor 1 (B1S1). This sensor plays a crucial role in maintaining optimal engine performance by detecting the air-fuel ratio in the exhaust, then sending this data to the Trax’s ...P0171 - Fuel System Too Lean Bank 1 P0131 - O2S Circuit Low Voltage Bank 1 Sensor 1. This DTC determines if the O2 sensor circuit is shorted to low. ... On the GEN 1 and Chevy cruise with the 1.4 liter engine, there is a issue with the camshaft cover having a vacuum leak on the PCV system. You can check this by running the engine and …These are the conditions for the code P0171 to set : * The engine is in Closed Loop status. * The catalyst monitor diagnostic intrusive test, post 02 diagnostic intrusive test, and EVAP diagnostic test are not active. * The engine coolant temperature (ECT) is between -20°C and +150°C (-4°F and +302°F). * The intake air temperature (IAT) is ...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...Nov 26, 2022 · Today we go over the diagnosis and fix for this lean condition p0171 on this 2017 Holden Trax, previously serviced by another mechanic a few weeks prior, the...

2016 Chevy Trax - P0171 code. Got it scanned and it says “Bank 1 system too lean” other scanner said “fuel trim system lean”. Went ahead and changed the upstream o2 sensor and the check engine light went away. Drove the car and everything was fine until I put gas in the car and it shook for about 30 seconds after I turned the car back on. 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 … Chevrolet Sonic, or 2014 model year Chevrolet TRAX vehicle, your satisfaction with our product is very important to us. This letter is intended to make you aware that some 2014 model year Buick Encore, 2011 - 2014 model year Chevrolet Cruze, 2012 - 2014 model year Chevrolet Sonic, and 2014 model year Chevrolet TRAX vehicles, equipped with a 1.4L 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 …A very common reason for the Service Stabilitrak message is a misfiring engine. If the OBD scanner gives codes P0301 to P0304, for example, then that means a misfiring cylinder. The last digit is the cylinder number. Cylinders will misfire if spark plugs or the coils need to be replaced.Feb 19, 2024 · 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 ... One of these sensors is the Mass Air Flow sensor (MAF), which monitors the quantity of air entering the engine, and the ECU will illuminate the CEL right away if it detects that the MAF sensor's ...I purchased my 2013 Chevy Cruze in October 2013 and it has for the most part been a wonderful car. I remember people on here talking about the coolant level falling (Which mine has done ever since it was brand new.) But this has been the only small issue with the car until now. Anyway I have 2013 1.4L and it now has 55,000 miles

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.On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes. This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses ...It is also one of the most common codes. The most common causes of P0171 are a bad Oxygen sensor, a vacuum leak, or a dirty MAF sensor. Definition. P0171: Fuel Trim System Lean (Bank 1). Symptoms. Check engine light, decreased fuel economy, misfire, hard to find idle. Common Causes.June 5, 2023 by Jason. The P0131 code is an OBD-II diagnostic trouble code that indicates low voltage in the Chevy Trax’s Oxygen (O2) sensor circuit for Bank 1, Sensor 1 (B1S1). This sensor plays a crucial role in maintaining optimal engine performance by detecting the air-fuel ratio in the exhaust, then sending this data to the Trax’s ...

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Engine is idling rough & seems to want to stall. CEL came on last Sunday. Ticking noise when running. I had the cruise control on today at 60mph, completely flat road & MPG indicator was erratic - bouncing from 20mpg to 45mpg to 30mpg to 80mpg, etc. AutoZone scan came back with P0171 & P0496. Took it to my usual GM dealer, they want $100 to ...The code P0171 on your 1.4 engine indicates a vacuum leak and on this engine, it can be caused by a poorly seated dipstick or a leaking valve cover, and usually, if that is the case there is a whistling noise, if that is the case then replacing the camshaft cover assembly will resolve this code. Start here first by checking the dip stick, see ...On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes. This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses ...Let's see if an "intelligent" large language model can correctly diagnose a broken 2015 Chevy Trax with a 1.4L turbo. Send us a postcard: Watch Wes WorkP.O. ...Feb 19, 2024 · 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 ...

If you’re in the market for a used SUV, a Chevy Blazer is definitely worth considering. Known for its reliability, versatility, and stylish design, the Chevy Blazer has been a popu...May 29, 2020 ... 2011-2015 CHEVY CRUZE ROUGH IDLE FIXED! CODES P0171 P1101 P0106 FIXED! PVC VACUUM LEAK DIAGNOSIS AND FIX! VALVE COVER GASKET REPLACEMENT!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. Chevrolet Sonic, or 2014 model year Chevrolet TRAX vehicle, your satisfaction with our product is very important to us. This letter is intended to make you aware that some 2014 model year Buick Encore, 2011 - 2014 model year Chevrolet Cruze, 2012 - 2014 model year Chevrolet Sonic, and 2014 model year Chevrolet TRAX vehicles, equipped with a 1.4L Either way these codes point to the MAF sensor or a leak between the MAF and the inlet to the turbo.Make sure all the clamps are tight. Maybe clean MAF if dirty. 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. Richarddespain75.13 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 …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 …Upon bringing the car into the shop, Watch Wes Work checks for fault codes in the 2015 Chevrolet Trax, receiving three errors: P0171 (Fuel Trim System Too Lean), P0420 (Catalyst System Low ...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.Jul 28, 2022 · 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, ... Dec 13, 2018 · Engine is idling rough & seems to want to stall. CEL came on last Sunday. Ticking noise when running. I had the cruise control on today at 60mph, completely flat road & MPG indicator was erratic - bouncing from 20mpg to 45mpg to 30mpg to 80mpg, etc. AutoZone scan came back with P0171 & P0496. Took it to my usual GM dealer, they want $100 to ... In this video i will be showing you how to diagnose and fix a lean condition code (P0171) for 2013 Chevy Trax

The P0496 code indicates that there’s an incorrect amount of intake vacuum flow occurring in the car’s EVAP system. Any time this vacuum is higher than what the computer determines is appropriate, the codes will be set. While this code can occur with all brands, it appears to be most common with GM vehicles.

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.Buy YOUCANIC Pro Scanner https://www.youcanic.com/scanner/Get Factory Service Repair Manuals & Specs https://www.youcanic.com/manualsAsk Car Questions & Get ...If it is running low, you can refill your Chevy Trax with this Synthetic DOT-3 brake fluid. DOT-3. Prestone AS401 DOT 3 Synthetic Brake Fluid – 32 oz. Improve your safety in high-stakes braking scenarios with Prestone, offering an additional margin of security. Ideal for ABS, disc, and drum brake systems, it ensures reliable performance …A code P0171 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.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 ...May 10, 2022 · P015B - 02 sensor delayed response, lean to rich (bank 1 sensor 1). This is probably the most common one, has appeared multiple times. P0299- Turbo underboost condition (only appeared once) P1101 - Mass Air Flow sensor out of self test range (only appeared once) P0496 - EVAP emission system high purge flow (only appeared once) P2270 - Oxygen ... 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 P0171.6.0 Chevy motor with codes P0171, P0325, P219A, P0430, P0420 and it's running pretty rough. Customer has had an exhaust leak on drivers side where manifold meets the down pipe but it's been running ok …

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May 15, 2019 ... Chevy Cruze Inside l k - "P0171 Traction Control Alert" - Failed PCV Valve! · Comments19.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. Jan 6, 2020 ... Chevy Trax / Cruze / Buick Encore Valve Cover Replacement - P0171 Bank 1 Lean · Comments173.Jul 12, 2023 ... Chevrolet Trax 2016 Chevrolet Trax 2017 Chevrolet Trax 2018 Chevrolet Trax 2019 Chevrolet Trax ... | Chevy Trax P0171, P1101, P0420. Watch Wes ...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.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%.Jul 12, 2023 ... Chevrolet Trax 2016 Chevrolet Trax 2017 Chevrolet Trax 2018 Chevrolet Trax 2019 Chevrolet Trax ... | Chevy Trax P0171, P1101, P0420. Watch Wes ...Aug 7, 2023 · 6.0 Chevy motor with codes P0171, P0325, P219A, P0430, P0420 and it's running pretty rough. Customer has had an exhaust leak on drivers side where manifold meets the down pipe but it's been running ok … ….

After about 5-10 or so minutes of driving the engine seems to surge when I stop at an intersection or traffic light. It also threw a P0171 lean condition code and I got a service StabiliTrak warning on the dash. This only seems to happen in cold weather below about 50 F. I used my scan tool to collect some engine data at about 2500rpm.Upon bringing the car into the shop, Watch Wes Work checks for fault codes in the 2015 Chevrolet Trax, receiving three errors: P0171 (Fuel Trim System Too Lean), P0420 (Catalyst System Low ...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.P0174 indicates that your Chevy Trax 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 P0174. It’s unlikely that you’ll see P0171 if this is the case.Feb 20, 2023 · 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 ... 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 ...A vehicle may come in with DTC P0171 – Fuel Trim System Lean, or other airflow-related DTCs. Following the diagnostics in SI for that DTC may lead to the PCV system as a potential source of external airflow. 2. Confirm a bad PCV valve. a. Remove the engine cover. ... Chevrolet Sonic, or 2014 model year Chevrolet TRAX vehicle, your …Bypass Valve Solenoid - P2261 [SOLVED] For a 2014 Chevrolet Cruze 1.4l Turbo. Recently we took it to a shop for the code P2261, turbocharger bypass valve. The shop said that they compressed air into the air intake and it would not hold. So, they said the turbo would not kick in if the intake isn’t building pressure. Chevy trax p0171, 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!, Everything you need to know about diagnosing a MAP sensor problem on a Chevy Equinox (Also Applies To Most Other Vehicles), 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 ..., Chevy Trax General Discussion Code 84. Jump to Latest ... My actual engine code lights are p0068, p0097, p00f4, p0106, p0113, p0171, p01101, p0102, p2227, p2228. The car only shakes when in idle (park, neutral, drive) but if the car is moving the engine is not shaking. Just replaced my coolant temperature sensor last night and …, Vehicle: 2016 Chevy Trax LT 1.4l Mileage: 64k Date issue began: 12/31/21 Mechanical Experience: Very much an amateur, but with a YouTube video I can usually figure it out. On 12/31/21, I filled up the car at my usual gas station and the vehicle had a rough time starting. ... P0171: System too lean, bank 1 (this came up twice) P0496: EVAP system-high purge …, 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 …, Dec 19, 2018 · Here are the most common symptoms of P0303 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. , 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 ... , 544. 38K views 3 years ago. In this video we look at a 2017 Trax P0171 Code Causes, Tests and Fix/fixes! This video may be applicable to other GM vehicles …, American-made Chevrolet is one of the best-selling brands in the United States. If you are in the market for a used Chevy, whether a sedan, truck, SUV or sports car, this article h..., Summary. DTC P2097 stands for “Post Catalyst Fuel Trim System Too Rich Bank 1”. This code is triggered when the downstream bank 1 oxygen sensor registers a rich condition. The most common symptoms of a P2097 include a lit check engine light, poor engine performance, and a reduced fuel economy. Contents., 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., 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%., May 10, 2023 · A very common reason for the Service Stabilitrak message is a misfiring engine. If the OBD scanner gives codes P0301 to P0304, for example, then that means a misfiring cylinder. The last digit is the cylinder number. Cylinders will misfire if spark plugs or the coils need to be replaced. , Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Silverado’s engine is running lean. The sensor on or right after the exhaust manifold is typically the sensor that reports the lean condition. If it is malfunctioning, it can cause a false P0171 code. Swap Test., 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 ..., , 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 ..., 2016 Chevy Trax... P015B, P0171, P1101 and P0227 codes... I. 2016 Chevy Trax... P015B, P0171, P1101 and P0227 codes... I have ran smoke test and the only place I have smoke coming out is at the frame under the drivers side.... I …, 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., Jul 6, 2022 ... 11:46. Go to channel · Chevy Trax / Cruze / Buick Encore Valve Cover Replacement - P0171 Bank 1 Lean. Chad Williams•131K views · 12:40. Go to ..., 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 …, Engine is idling rough & seems to want to stall. CEL came on last Sunday. Ticking noise when running. I had the cruise control on today at 60mph, completely flat road & MPG indicator was erratic - bouncing from 20mpg to 45mpg to 30mpg to 80mpg, etc. AutoZone scan came back with P0171 & P0496. Took it to my usual GM dealer, they want $100 to ..., Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Spark’s engine is running lean. The sensor on or right after the exhaust manifold is typically the sensor that reports the lean condition. If it is malfunctioning, it can cause a false P0171 code. Swap Test., Causas comunes del código P0171. 1. Sensor de oxígeno defectuoso. 2. Sensor de flujo de aire en masa (MAF) sucio o defectuoso. 3. Fugas de vacío en el sistema de admisión. 4. Inyectores de combustible sucios o defectuosos., Causas comunes del código P0171. 1. Sensor de oxígeno defectuoso. 2. Sensor de flujo de aire en masa (MAF) sucio o defectuoso. 3. Fugas de vacío en el sistema de admisión. 4. Inyectores de combustible sucios o defectuosos., Figured maybe the shop got a bit sloppy, and didn't think much more of it at the time. Next day the check engine light came on. Went to Advance, got it read, and it kicked out P1101 and P0171. Judging from what I've read, this could be MAF, vacuum leak, or others. But, I also found a thread that said these codes kicked out when the oil cap …, 544. 38K views 3 years ago. In this video we look at a 2017 Trax P0171 Code Causes, Tests and Fix/fixes! This video may be applicable to other GM vehicles …, Code Number Code Description Related Codes; P0171: System Too Lean (Bank 1) P1101 - Intake Air Flow System Performance P2097 - Post Catalyst Fuel Trim System High Limit P2277 - Barometric Pressure ..., P0171 is one of the hardest codes to solve because so many things can cause a lean condition. From mice nesting in the airbox to multiple sensors being on the border to corroded connectors. Most …, It is also one of the most common codes. The most common causes of P0171 are a bad Oxygen sensor, a vacuum leak, or a dirty MAF sensor. Definition. P0171: Fuel Trim System Lean (Bank 1). Symptoms. Check engine light, decreased fuel economy, misfire, hard to find idle. Common Causes., 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 …, This page is meant to help you troubleshoot the Chevy Trax 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. Table