Dtc p0171 chevrolet

The cause of a P0171 code could be as simple as dirty airflow sensors, but you might also be dealing with defective sensors, plugged up fuel filters, jammed fuel …

Dtc p0171 chevrolet. P0171 Fuel system Lean. I've owned my car all of a month, had a coolant leak, then had to replace the spark plugs, and the manual trans fluid, and now the car wants more. Today on to lunch break, she popped the check engine light on, and my 2012, 1.4 Turbo, stayed on my mind all day at work. It ran well enough, and I got it home, scanned …

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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, ...6 posts · Joined 2017. #1 · Apr 27, 2018. I have a 2013 1.4 Turbo with the CEL on. The code is P0171 (too lean) It has 71,000 miles on it. I bought it with 51,000 miles on it, and about 12,000 miles later it started making a ticking noise. I was told it was probably the purge valve.Oct 24, 2016 ... First the MAF sensor was bad, so I replaced it. Also, it was time to replace the cats, so I did that. After all of that work I got two new codes ...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.The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Camaro’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. P0171 is a common trouble code for a Chevy Silverado with an engine that is running lean. This can be caused by a number of different things, but the most common cause is a vacuum leak. Other causes can include dirty fuel injectors, a faulty mass air flow sensor, or a leaking intake manifold gasket. Trouble Code - P0171, P0174. Been getting occasional P0171, P0174 codes but the truck (07-13 Silverado 1500) runs great, idles great and is otherwise not having any performance issues at all. I cleaned the MAF, and throttle body, and installed 4 new Oxygen Sensors (Denso) and still getting occasional P0171, P0174 codes.GM stock is in the spotlight today as General Motors gets ready to unveil its Chevrolet Silverado E truck. Where is the automaker going next? Wedbush says the Silverado E is 'not y...

2. Enter the VIN in the parts catalog and go to the fuel injector rail parts section. 3. After the injector part number has been identified on the body of the injector, in the description column. For example, part number 12668390 highlighted in the table. To the left is the part number that will need to be order. 6 posts · Joined 2017. #1 · Apr 27, 2018. I have a 2013 1.4 Turbo with the CEL on. The code is P0171 (too lean) It has 71,000 miles on it. I bought it with 51,000 miles on it, and about 12,000 miles later it started making a ticking noise. I was told it was probably the purge valve.Good luck diagnosing the code. P2270 is a general DTC trouble code, which means it has the same meaning for the Chevy Cruze 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 …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.To diagnose the P0171 2006 Chevrolet Trailblazer 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.To diagnose the P018B 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.

Aug 8, 2015 ... Fuel trim system lean bank 1 could be caused from an air leak in the intake, or bad Heated oxygen sensor. You may try changing the air filter, ...http://1aau.to/h/cmc/Have a check engine light but nothing feels different? Does your check engine code say P0171 Low Fuel Trim? Check out this video to see ...Details on causes of DTC P0171 and troubleshooting steps. Common fixes include cleaning the MAF sensor and repairing for vacuum leaks.Mezcla PobreElementos en causa. SoluciónResuelto - resolución - soluciónP0171 y P0174Chevrolet Matiz / Spark - Pontiac G2Sintomas:• Luz de check engine encen...Descripción del código de falla P0171. Este código de diagnóstico de problemas (DTC) P0171, es un código genérico del tren motriz, y es aplicable a todas las marcas y modelos de vehículos. Suele implicar que un sensor de oxígeno en el banco 1 ha detectado una condición de mal funcionamiento, es decir, demasiado oxígeno en el escape.

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The P0171 code indicates that the fuel system in part of the engine is running weak or there is a vacuum leak near that side of the engine. This happens when the engine is getting too little gas or too much air. Now let’s go over a bit of Chevy Cruze history. Then we will go into more detail about the P0171 code.This particular Cruze is a 2012 1.4 Turbo but this procedure is very similar to allot of Chevy ans other years Cruze's.Recently I had been felling the car ru...Fuel Injectors. P0171 indicates that your Chevy Aveo 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.As of 2016, common problems reported by Chevrolet Cruze owners include transmissions not shifting correctly, coolant leaks and throttle lag. Owners of the 2011 Chevrolet Cruze have...Fuel trims and Equinox P0171 or Terrain P0171 trouble code. A P0171 FUEL METERING TOO LEAN code can mean the engine is getting too much unmetered air or too little fuel. So you want to see if the PCM is trying to add fuel. Refer to the short and long term fuel trim data on your scan tool. Short term fuel trims should vary as your drive …

Both of these codes are generic, which means they have the same meaning (Traverse or not). P0171 – Fuel Trim System Lean → Bank 1: P0171 indicates that the side of the engine with the first cylinder (Bank 1) is running lean. P0174- Fuel Trim System Lean → Bank 2: P0174 indicates that the side of the engine with the first cylinder (Bank 2 ...P0171 and P0174 occur when the air/fuel mixture on the vehicle gets too lean. They are both thrown when the oxygen sensors detect that there is not enough oxygen in the exhaust. The engine then makes adjustments to compensate and throws these codes, which trigger the service engine soon light. When these codes both appear at the same …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.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.P0171 and P0174 occur when the air/fuel mixture on the vehicle gets too lean. They are both thrown when the oxygen sensors detect that there is not enough oxygen in the exhaust. The engine then makes adjustments to compensate and throws these codes, which trigger the service engine soon light. When these codes both appear at the same time, it ...6 posts · Joined 2017. #1 · Apr 27, 2018. I have a 2013 1.4 Turbo with the CEL on. The code is P0171 (too lean) It has 71,000 miles on it. I bought it with 51,000 miles on it, and about 12,000 miles later it started making a ticking noise. I was told it was probably the purge valve.Jul 10, 2018 · 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. Technician may find Diagnostic Trouble Codes P0171 and or P1101 set. Technician will need to inspect the Air Cleaner Housing. ... 2018-2019 Chevrolet Colorado & GMC Canyon. Information on General Guidelines to Address Sunroof Waterleak Issues – 2016-2020 Cadillac CT6.One of the most common trouble codes with the Chevy Cruze is P0171. It indicates that your Chevy Cruze is running lean on the bank one side. It’s the most common air/fuel mixture-related code. ... Read more at: OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected "Don't just drive CRUZE!" ༼∵༽ ༼⍨༽ ༼⍢༽ ༼⍤༽They replaced the valve cover, camshaft cover and the intake manifold. Also the found a missing pcv hose and replaced it. The codes that they found were p0171,p1101, and p0108. All of this was replaced under the power-train warranty. I was told this is a common problem and they have updated what they replaced so it shouldn't happen …

Reparar P0171 en Chevrolet Sonic. Generalmente esta falla da casi siempre en los Sonic que tienen más de 80.000 km recorridos, ya que suele suceder por falta de mantenimiento, ya que si nos ponemos analizar la pauta de mantenimiento esta indica que a los 80 mil km se debe reemplazar una pequeña válvula llamada 'Válvula PCV' la que que se encarga …

In a previous video Marie diagnosed a lean running Chevy Sonic and figured out it was a leaking valve cover (PCV System) In this video she replaces the leaki...Apr 5, 2019 ... Comments494 ; P0171 Trouble Code: System Too Lean Bank 1 Diagnosis. Big Dog50001 Automotive · 2.5M views ; Chevy Cruze P0171 - Rough Idle - ...http://1aau.to/h/cmc/Have a check engine light but nothing feels different? Does your check engine code say P0171 Low Fuel Trim? Check out this video to see ...Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Cobalt’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.P0171 and P0174 both indicate that there is a lean condition present in your Chevy Suburban. By themselves, these are some of the most common OBD2 codes. When they are together, it indicates that the entire engine is running lean. Definition Both of these codes are generic, which means they have the same meaning.Aug 24, 2018 · Te suministramos todo lo que necesitas saber sobre el código DTC P0171: ️ Descripción, ️ causas, ️ síntomas y ️ posibles soluciones.LEER SOLUCIÓN DEL CÓD... The most common cause of the P0171 code – and the P0170 and P0173-P0174 codes – is unmetered air entering the combustion system. Most of the time, this happens due to faulty or dirty mass ...4 posts · Joined 2019. #1 · May 30, 2019. Good afternoon. I’ve been looking for help all over. I own a 2016 Chevy Cruze Limited LT. After a day long road trip, my check engine light popped on for this first time since getting the car in 2017. It shows code p0171, system too lean bank 1. Autozone said it’s the mass air flow sensor but I ...The P0171 code could either mean that the oxygen sensor detects too much oxygen or too little fuel in the air-to-fuel ratio. Some possible causes for the imbalance include vacuum leaks, malfunctioning mass air flow sensors, and a clogged fuel filter. Symptoms of the P0171 code include power loss, misfires, and rough idling.What Is a Chevy Cruze P0171 OBDII engine code and what are the fixes?Read here for more information: https://www.backyardmechanic.org/what-is-a-chevy-cruze-p...

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Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Cavalier’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.Jul 10, 2021 · By Vlad Samarin, Updated: July 10, 2021. The OBDII trouble code P0171 - System Too Lean (Bank 1) means that the engine air-fuel mixture is too lean, or there is too much air and too little fuel. Driving a car with the code P0171 can cause more damage to the engine over time, as when the engine runs lean, the combustion temperature is higher. The CEL came on and threw a P1101 & P0106. P1101 is a diagnostic trouble code (DTC) for "Mass Airflow Sensor Out of Self Test Range". P0106 is a diagnostic trouble code (DTC) for "Manifold Air Pressure (MAP) Barometric Pressure Sensor Electric Circuit Output Range and Performance Problem". 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. Tech inspected the vehicle and recovered the DTC P0171, Tech duplicated & performed diag, Tech found the intake manifold tuning valve was broken and causing the engine to run lean, Tech also states the PCV tube was cracked allowing unmetered air to enter the engine. Tech replaced the intake manifold and the PCV tube then cleared the …Several things can cause a P0171 OBDII Code on a Chevy Cruze with the list below of common causes and fixes. 7 Causes and Fixes for Chevy Cruze P0171 OBDII Code . Vacuum Leak ; A vacuum leak is a very common problem with a P0171 code. Often there is a leak somewhere that causes the air/fuel ratio to be wrong and cause issues.GM stock is in the spotlight today as General Motors gets ready to unveil its Chevrolet Silverado E truck. Where is the automaker going next? Wedbush says the Silverado E is 'not y...Both of these codes are generic, which means they have the same meaning (Traverse or not). P0171 – Fuel Trim System Lean → Bank 1: P0171 indicates that the side of the engine with the first cylinder (Bank 1) is running lean. P0174- Fuel Trim System Lean → Bank 2: P0174 indicates that the side of the engine with the first cylinder (Bank 2 ...The cause of a P0171 code could be as simple as dirty airflow sensors, but you might also be dealing with defective sensors, plugged up fuel filters, jammed fuel …Fuel Injectors. P0171 indicates that your Chevy Sonic 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.Updated: March 17, 2023. A P0171 code appears in the engine control unit when the oxygen sensor on bank 1 recognizes too lean of an air-fuel mixture for the sensor to correct it. … ….

Difficulty: 1/5. Time required: 5 minutes. Tools Required: Piece of paper or tissue. Remove the engine cover and locate PCV valve. With the engine running at idle, hold a small piece of paper or tissue in front of port. If the paper is drawn to the port, vacuum is present and the PCV valve is faulty. The most common cause of the P0171 code – and the P0170 and P0173-P0174 codes – is unmetered air entering the combustion system. Most of the time, this happens due to faulty or dirty mass ... 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 ...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, ...Oct 24, 2016 ... First the MAF sensor was bad, so I replaced it. Also, it was time to replace the cats, so I did that. After all of that work I got two new codes ...Fuel Injectors. P0171 indicates that your Chevy Impala 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.Jul 10, 2018 · 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. Both of these codes are generic, which means they have the same meaning (Traverse or not). P0171 – Fuel Trim System Lean → Bank 1: P0171 indicates that the side of the engine with the first cylinder (Bank 1) is running lean. P0174- Fuel Trim System Lean → Bank 2: P0174 indicates that the side of the engine with the first cylinder (Bank 2 ...The P0171 code could either mean that the oxygen sensor detects too much oxygen or too little fuel in the air-to-fuel ratio. Some possible causes for the imbalance include vacuum leaks, malfunctioning mass air flow sensors, and a clogged fuel filter. Symptoms of the P0171 code include power loss, misfires, and rough idling.OBD II fault code P0171 is a generic trouble code that is defined as “System too lean – Bank 1” and is set when the PCM (Powertrain Control Module) detects an air/fuel mixture that is too lean on bank 1. Dtc p0171 chevrolet, 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, …, Fuel trims and Equinox P0171 or Terrain P0171 trouble code. A P0171 FUEL METERING TOO LEAN code can mean the engine is getting too much unmetered air or too little fuel. So you want to see if the PCM is trying to add fuel. Refer to the short and long term fuel trim data on your scan tool. Short term fuel trims should vary as your drive …, Tech inspected the vehicle and recovered the DTC P0171, Tech duplicated & performed diag, Tech found the intake manifold tuning valve was broken and causing the engine to run lean, Tech also states the PCV tube was cracked allowing unmetered air to enter the engine. Tech replaced the intake manifold and the PCV tube then cleared the …, Qué significa el código P0171. El código DTC P0171 es uno de los códigos de diagnóstico más comunes. El código alerta sobre un exceso de oxígeno en los gases de escape, concretamente indica la detección de una condición demasiado baja en el sensor de oxígeno (sonda lambda) en el banco 1.. Este código se activa cuando el sensor de O2 …, May 25, 2022 · Tools needed for diagnosing advanced P0171 code causes: OBD II scanner or code reader. Carburetor or throttle body cleaner. 1. Disconnected or Leaking Hoses. Air Intake Hose: Find the air intake hose that connects to the engine. Grab and shake it so you can feel if anything is loose. , The Engine Control Module (ECM) uses the MAF sensor signal to provide the correct fuel delivery for all engine speeds and loads. The Diagnostic Trouble Code (DTC) will be set if the ECM detects that the measured MAF is not within a calibrated range of the model for greater than 2 seconds. P1101 Chevrolet Code - Intake Air Flow …, CODE P0171 EXPLAINED ON CHEVY, CHEVROLET, GMC, BUICK, CADILLAC ENGINE LIGHT ON Great Car Scanner: https://amzn.to/2QmNBri Check out our Amazon Store …, P0171 and P0174 occur when the air/fuel mixture on the vehicle gets too lean. They are both thrown when the oxygen sensors detect that there is not enough oxygen in the exhaust. The engine then makes adjustments to compensate and throws these codes, which trigger the service engine soon light. When these codes both appear at the same …, One of the most common trouble codes with the Chevy Corvette is P0174. It indicates that your Chevy Corvette is running lean on the bank two side of the engine. P0174 and P0171 (fuel trim lean bank one) are the most frequently seen air/fuel mixture-related codes. If they appear together, it reduces the list of, May 30, 2019 · 4 posts · Joined 2019. #1 · May 30, 2019. Good afternoon. I’ve been looking for help all over. I own a 2016 Chevy Cruze Limited LT. After a day long road trip, my check engine light popped on for this first time since getting the car in 2017. It shows code p0171, system too lean bank 1. Autozone said it’s the mass air flow sensor but I ... , 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..., 2013 Malibu P0171 (Lean in Bank 1) causes. The other day, I had my oil & filter changed and all went well -- fast forward about 150 miles of driving and the car throws an engine light right as I pull into my destination. Haven't noticed any change in performance at all. Popped the hood and my dipstick wasn't properly set in place so there was ..., Fuel Injectors. P0171 indicates that your Chevy Impala 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., In a previous video Marie diagnosed a lean running Chevy Sonic and figured out it was a leaking valve cover (PCV System) In this video she replaces the leaki..., The mass air flow sensor calculates the volume of air entering the engine. If it has gone bad, the air fuel mixture will be off and the P0174 and/or P0171 codes will show. It’ll be located between the air filter and the throttle body. It’s easy to find. It will have a wiring harness plugged into it., Ignoring or neglecting a P0171 engine code can have adverse effects on your vehicle: Reduced Fuel Efficiency: A lean mixture can result in poor fuel economy, costing you more at the pump.; Decreased Performance: Your vehicle's power and acceleration may suffer, leading to a less enjoyable driving experience.; Engine …, Chevrolet made Vortec engines beginning in 1986, and as of 2014, these engines are still available. However, General Motors is creating products under the Vortec name now. The firs..., One of the most common trouble codes with the Chevy Corvette is P0171. It indicates that your Chevy Corvette is running lean on the bank one side. It’s the most common air/fuel mixture-related code. It’s not the most complicated OBDII trouble code to diagnose. It is also one of the most common codes., Difficulty: 1/5. Time required: 5 minutes. Tools Required: Piece of paper or tissue. Remove the engine cover and locate PCV valve. With the engine running at idle, hold a small piece of paper or tissue in front of port. If the paper is drawn to the port, vacuum is present and the PCV valve is faulty., 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., 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. ... A forum community dedicated to Chevy Trax owners and enthusiasts. Come join the discussion about performance, troubleshooting, maintenance ..., P0171 Definition: Fuel Trim System Lean Bank 1. P0171 is a generic code, meaning it has the same definition for the Chevy Silverado as any other vehicle. Fuel …, At more than 100 years old, Chevrolet is one of the best-known car brands in the United States. From the old vintage models to perennial classics, here are 13 of the most popular a..., http://1aau.to/h/cmc/Have a check engine light but nothing feels different? Does your check engine code say P0171 Low Fuel Trim? Check out this video to see ..., What Is a Chevy Cruze P0171 OBDII engine code and what are the fixes?Read here for more information: https://www.backyardmechanic.org/what-is-a-chevy-cruze-p..., What Is P0171 Chevy Code. The P0171 is a diagnostics trouble code that indicates a problem with the lean air to fuel mixture on bank 1. Meaning that either bank 1 is affected on your V8 engine or if you run an inline engine there are all cylinders affected with lean air to fuel mixture. Causes For P0171 Chevy Code, Qué significa el código P0171. El código DTC P0171 es uno de los códigos de diagnóstico más comunes. El código alerta sobre un exceso de oxígeno en los gases de escape, concretamente indica la detección de una condición demasiado baja en el sensor de oxígeno (sonda lambda) en el banco 1.. Este código se activa cuando el sensor de O2 …, Bank 1: Now, to be a little more specific, P0171 DTC tells you that bank 1 is the one having the issue. Bank 1 is the engine bank that holds the spark plugs for cylinders 1, 3, and 5 (V6 4.3L). Cylinders 1, 3, 5, and 7 (V8 5.0L, 5.7L). This bank is the one on the driver side of the engine. Bank 2: A P0174 DTC tells you that bank 2 is the one ..., How to fixes a Chevy Silverado 5.3L engine with a P0171 Code System Too Lean (Bank 1)Read here for more information: https://www.backyardmechanic.org/fixes-f..., Typically, the P0171 engine code is also paired with a P0170 code; the P0170 code states that there is an issue with the fuel trim. ... Diagnosing a P0171 code in a Chevy vehicle or any other vehicle by using an OBD II scanner. These are tools that you connect to your vehicle's computer. Usually, the place to connect the scanner is under the ..., P0171 and P0174 both indicate that there is a lean condition present in your Chevy Corvette. By themselves, these are some of the most common OBD2 codes. When they appear together, it indicates that the entire engine is running lean. Definition Both of these codes are generic, which means they have the same meaning., Code P0171 2016 Chevrolet Silverado Tech Notes. 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 ..., Oct 11, 2023 · P0171 Definition. The P0171 code is a diagnostic trouble code that indicates a lean condition in the fuel trim system of bank 1. This code is commonly seen in Chevy Equinox models and other vehicles that use OBDII systems. The code is set when the fuel trim system is unable to maintain the correct air/fuel ratio, resulting in a lean condition.