Gm p0172-00

Dec 17, 2015 · Codes Related to P0172. While diagnosing DTC P0172, you may also run across these other DTCs: P0170 – Fuel Trim Malfunction (Bank 1) P0173 – Fuel Trim Malfunction (Bank 2) P0175 – Fuel System Too Rich (Bank 2) P0101 – Mass Air Flow Circuit Range / Performance. P0104 – Mass Air Flow Circuit Intermittent. P030x – Cylinder Misfire ...

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. Contentshide.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. 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 22, 2015. 7,822. Tampa Bay Area. Feb 26, 2020. #2. Addressing the P0172,and P0175 Codes involves considering Two Problems: (1) A Dirty Mass Air Flow Sensor(YES... Even in the Absence of the P0101 Code indicating a MAF Sensor Problem)...the 2nd Video explains WHY to look at it WAY UP FRONT in the Engine Bay): You live in the Higher Altitudes ...Bank 2: A P0174 DTC tells you that bank 2 is the one having the issue. Bank 2 is the engine bank that holds the spark plugs for cylinders 2, 4, and 6 (V6 4.3L). Cylinders 2, 4, 6 and 8 (V8 5.0L, 5.7L). This bank is the one on the passenger side of the engine. The main sensors responsible for telling the PCM that there's a problem with the air ...

So, just a heads up to all of those that are watching. GM issued a TSB #05-06-04-029A for this problem. All vehicles from 99-05 with the 4.8L, 5.3L or 6.0L are prone to this issue. The bulletin states that it is very common to see lean codes P0171 & P0174 TOGETHER, and also a possible missfire code.The My GM Rewards Card offers high earning potential, but it likely only makes sense if you want to redeem your points toward GM-related purchases. We may receive compensation from...Nov 15, 2022 ... Comments106 · GM 5.3 6.2 P0172 P0175 Fuel Trim Rich Diagnosis And TSB · Parts Cannon Special: Rich Running Chevy Truck P0172 and P0175 · This ...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 ...The P0172 code indicates that there is too much gasoline being detected in the exhaust gasses exiting the combustion chamber. The ECU uses a number of instruments, such as the mass air flow sensor (MAF), oxygen sensors, and manifold absolute pressure (MAP) to monitor the air-fuel ratio of the engine.GM issued a TSB #05-06-04-029A for this problem. All vehicles from 99-05 with the 4.8L, 5.3L or 6.0L are prone to this issue. The bulletin states that it is very common to see lean codes P0171 & P0174 TOGETHER, and also a possible missfire code. The catch to this is that GM also changed the gasket material to help fix this problem, and they ...Your fuel system can be a major source of issues. A failed fuel pressure sensor, pump, or clogged fuel filter can cause the P0171 trouble code. Anything that restricts the fuel pressure, or causes an obstruction within the system will prevent the engine from getting the fuel it needs . Vacuum Leak.

• P0172: Fuel System Rich • P026D: Injection Quantity Too High • P0300: Engine Misfire Detected • P2A00: HO2S Performance Sensor 1 Correction If you encounter such a situation,DO NOTreplace the fuel system as described in Service Bulletin #16-NA-102. Please perform the following fuel system flushing procedure prior to performing furtherProblem:-Getting Check Engine Light Fault Code P0172 Fuel Trim System RichSymptoms:- - Smell Your Engine oil from your dip stick you will notice a mixture of...On rare occasions, some customers may experience a hard start cold, brief rough running on cold start, black exhaust color, and/or SES light. If a SES light is experienced, DTCs P0172 and/or P0175 may be stored. If driveability symptoms are experienced, they will generally diminish within 1 minute of start up.Oct 22, 2015. 7,822. Tampa Bay Area. Feb 26, 2020. #2. Addressing the P0172,and P0175 Codes involves considering Two Problems: (1) A Dirty Mass Air Flow Sensor(YES... Even in the Absence of the P0101 Code indicating a MAF Sensor Problem)...the 2nd Video explains WHY to look at it WAY UP FRONT in the Engine Bay): You live in the Higher Altitudes ...Problem:-Getting Check Engine Light Fault Code P0172 Fuel Trim System RichSymptoms:- - Smell Your Engine oil from your dip stick you will notice a mixture of...

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P0014 indicates that the camshaft position sensors detected an incorrect camshaft timing on camshaft B on bank 1. In most cases, this means that there is a problem with your variable camshaft timing control, but it can also mean that there is a problem with the camshaft timing. The timing between the camshafts and crankshaft must be correct …Fuel System Too Rich. P0172 is thrown when the oxygen sensors detect that the air-fuel mixture is too rich. A rich fuel mixture contains too much fuel in relation to air. The A/F ratio for ideal combustion is 14.7 parts air to 1 part fuel (14.7:1). With that in mind, either too much fuel or not enough air can cause a vehicle to run rich. The P0172 trouble code is set when excess gasoline is in the air-fuel mixture. Learn how to diagnose and fix the P0172 code with YourMechanic today. 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. On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. Code P0172 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 can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where ...

Te suministramos todo lo que necesitas saber sobre el código DTC P0172: ️ Descripción, ️ causas, ️ síntomas y ️ posibles soluciones.LEER SOLUCIÓN DEL CÓD...Te suministramos todo lo que necesitas saber sobre el código DTC P0171: ️ Descripción, ️ causas, ️ síntomas y ️ posibles soluciones.LEER SOLUCIÓN DEL CÓD...Jan 27, 2021 · This article will therefore deal with code P0171 as it applies specifically to GM vehicles. 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. Note that in the context of this code ... Indicator Lamp (MIL) Illuminated - DTCs P0300-P0308, P050D, P0171, P0172, P0174, P0175, P2099, P219A, and/or P219B Set Attention: This bulletin applies to V6 and V8 Gasoline Engines ONLY. Brand: Model: Model Year: VIN: Engine: Transmission: ... GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They … Keep an eye on the oxygen sensor. Tip 1: Regular maintenance is key, and that includes keeping an eye on that air filter. A clogged air filter can cause the fuel system to run rich, which can trigger the P0172 code. Make sure to replace that air filter every 12,000 miles or 12 months, whichever comes first. I drove it almost 4 hours the first day, and a few hours since, then while idle at the drive through it popped up. ODBII scanner shows 5 codes, P0024, P0172 bank 1, P0172 bank 2, P0175 bank 1 and P0175 bank 2. Tackling the P0024 first, watched this video that said oil change may fix it or camshaft oil valve.Your fuel system can be a major source of issues. A failed fuel pressure sensor, pump, or clogged fuel filter can cause the P0171 trouble code. Anything that restricts the fuel pressure, or causes an obstruction within the system will prevent the engine from getting the fuel it needs . Vacuum Leak.The P0172 code is indicative of a System Too Rich (Bank 1) condition in the engine’s air-fuel mixture ratio. It signals that the Powertrain Control Module (PCM) has detected a richer than ideal air-fuel mixture in Bank 1 – the side of the engine with cylinder number one. This imbalance implies that there is too much fuel or too little air ...The P0172 code means that more gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0172 is set in along with the P0175 code, it is highly likely that the problem is caused by leaking fuel injectors. If there are no leaking fuel injectors, the next step is to replace the air filter and clean the Mass Air Flow (MAF ...Jan 23, 2015 ... but the hard to start is still there along with the p0172 code. I have a guess that it could be my o2 sensor. I had a hole in the exhauset ...Jun 12, 2023 ... Honda/Acura Running Rich Repair - Trouble codes P0175 P0172 -PART 1 - Acura/Honda ... 96-00 Honda Civic p0172 Runnin rich. Jabo The ... GM 5.3 6.2 ... P0171 is a common fault code that indicates a lean condition on Bank 1 of the engine. The symptoms of P0171 can include poor fuel economy, rough idling, or lack of power. The underlying causes of P0171 can include a faulty sensor, restricted air intake, exhaust leaks, failed catalytic converter, or electrical issues.

Nov 21, 2018 · Fuel System Too Rich. P0172 is thrown when the oxygen sensors detect that the air-fuel mixture is too rich. A rich fuel mixture contains too much fuel in relation to air. …

The OBDII trouble code P0172 - System Too Rich (Bank 1) means that the engine air-fuel mixture is too rich, or there is too much fuel and too little air. The code P0175 - System Too Rich (Bank 2) is the same code only for Bank 2 in an engine with two cylinder banks (e;g;, V6 or V8) Symptoms: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.The trouble code “P0172 system too rich” means there is too little oxygen in the exhaust. This error code is triggered by an oxygen sensor in bank one, the side of the engine with ...P0172 is a diagnostic trouble code (DTC) that indicates a fuel system rich condition in the Chevy Equinox. The code is triggered when the powertrain control module (PCM) detects a fuel-to-air ratio that is too rich for efficient engine operation. This condition can be caused by a variety of factors, and it is important to identify and repair ...GM announced that 39-year-old Dhivya Suryadevara will succeed Chuck Stevens as CFO in September. Here's how much she could make. By clicking "TRY IT", I agree to receive newsletter...Fuel System Too Rich. P0172 is thrown when the oxygen sensors detect that the air-fuel mixture is too rich. A rich fuel mixture contains too much fuel in relation to air. The A/F ratio for ideal combustion is 14.7 parts air to 1 part fuel (14.7:1). With that in mind, either too much fuel or not enough air can cause a vehicle to run rich.Fuel System Too Rich. P0172 is thrown when the oxygen sensors detect that the air-fuel mixture is too rich. A rich fuel mixture contains too much fuel in relation to air. The A/F ratio for ideal combustion is 14.7 parts air to 1 part fuel (14.7:1). With that in mind, either too much fuel or not enough air can cause a vehicle to run rich. Keep an eye on the oxygen sensor. Tip 1: Regular maintenance is key, and that includes keeping an eye on that air filter. A clogged air filter can cause the fuel system to run rich, which can trigger the P0172 code. Make sure to replace that air filter every 12,000 miles or 12 months, whichever comes first.

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Those P0172 P0175 Chevy Silverado codes say your engine runs too rich on both banks (engine’s banks 1 and 2). While P0175 will pop up when the bank 2 oxygen sensor detects the oxy deficiency or too much fuel amount in the engine, P0172 functions similarly under the bank 1 oxygen sensor’s control. Bank 1 is on the engine’s side.The P0172 code means that more gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0172 is set in along with the P0175 code, it is highly likely that the problem is caused by leaking fuel injectors. If there are no leaking fuel injectors, the next step is to replace the air filter and clean the Mass Air Flow (MAF ...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 ...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.May 5, 2021 ... GM 5.3 6.2 P0172 P0175 Fuel Trim Rich Diagnosis And TSB ... 96-00 Honda Civic p0172 Runnin rich. Jabo The ... 2:00 · Go to channel. 2003 Ford F-150 ...Nov 12, 2012 · Failed or Faulty Oxygen Sensor (bank 1, sensor 1) Sticking/Plugged or Failed Fuel Injector. Low Fuel Pressure (possible plugged/dirty fuel filter!) Exhaust Leak between Engine and first Oxygen Sensor. Possible Solutions: A lot of Times, Cleaning the MAF Sensor and Finding/Fixing Vacuum Leaks fixes the Problem. Common Reason: Code P0172 is often related to a vacuum leak. Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much air and/or too little fuel results in the engine running lean setting P0171 or P0174 trouble codes, while too much fuel and/or too little air results in the ...Nov 15, 2022 ... Comments106 · GM 5.3 6.2 P0172 P0175 Fuel Trim Rich Diagnosis And TSB · Parts Cannon Special: Rich Running Chevy Truck P0172 and P0175 · This ...If you're searching for how to fix the P0172 code, this code indicates that your engine bank 1 is running with too much fuel. Too much fuel might be related to a lot of fuel supply or insufficient air supply. Whatever the causes, all you need to do is confirm the issue by using an OBDII scanner then, either clean the MAF sensor or replace the ... ….

Fuel System Too Rich. P0172 is thrown when the oxygen sensors detect that the air-fuel mixture is too rich. A rich fuel mixture contains too much fuel in relation to air. The A/F ratio for ideal combustion is 14.7 parts air to 1 part fuel (14.7:1). With that in mind, either too much fuel or not enough air can cause a vehicle to run rich.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 ... What the P0175 code means. P0175 indicates that the Engine Control Module (ECM) detects too much fuel and not enough oxygen in the air fuel ratio (AFR). This code will set when the ECM can not compensate for the amount of air or fuel required to return the air fuel ratio back to the set parameters. For gasoline powered engines, the most fuel ... Dec 4, 2020 · P0172 GM Service Bulletin #18-NA-246 — TSB Fix P0172 GM Service Bulletin #18-NA-246. GM has issued a service bulletin #18-NA-246 to address a P0172 code on the vehicles listed below. This Bulletin applies to the vehicles that have fuel enriched engine oil due to short driving intervals. Dec 5, 2023 · The code P0107 in Chevrolet vehicles refers to a problem with the Manifold Absolute Pressure (MAP) sensor. This sensor is responsible for measuring the pressure inside the intake manifold and providing data to the engine control module (ECM) to determine the correct air-fuel mixture. When the ECM detects that the MAP sensor is not providing ... The most common repairs needed to fix the P0171 engine code are as follows: Replacing the fuel pump. Replacing the fuel filter. Replacing the fuel pressure regulator. Replacing the powertrain control module. Replacing one or more injectors. Replacing one or more oxygen sensors. Replacing the mass air flow sensor. Repairing a vacuum leak.A torn crankcase pressure control diaphragm would cause the tissue to be held against the port (smoke would be continuously drawn in) due to internal engine vacuum leaking through the diaphragm. 5. Check to see if there is vacuum at the PCV vent at the front of the PCV valve by placing a piece of tissue near it.Code P0300 is often related to bad spark plugs or spark plug wires but could be caused by a number of issues relating to ignition and the air-to-fuel ratio in the cylinders. When the air/fuel mixture in your cylinder (s) is not able to burn normally and the difference is severe enough, it may cause a misfiring cylinder problem in your vehicle ...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 System … Gm p0172-00, GM said Wednesday that it will postpone its upcoming reveal of a GMC-branded electric Hummer due to the COVID-19 pandemic. The Hummer EV debut, which was scheduled to occur May 20,..., The P0172 code is indicative of a System Too Rich (Bank 1) condition in the engine’s air-fuel mixture ratio. It signals that the Powertrain Control Module (PCM) has detected a richer than ideal air-fuel mixture in Bank 1 – the side of the engine with cylinder number one. This imbalance implies that there is too much fuel or too little air ..., Sep 29, 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. , Aug 29, 2018 ... ANÁLISIS: P0172 CHEVROLET - Sistema de Entrega de Combustible Rich Banco 1 APREDEREMOS A RECONOCER ESTA CONDICION, identificar valores y ..., Nov 12, 2012 · Failed or Faulty Oxygen Sensor (bank 1, sensor 1) Sticking/Plugged or Failed Fuel Injector. Low Fuel Pressure (possible plugged/dirty fuel filter!) Exhaust Leak between Engine and first Oxygen Sensor. Possible Solutions: A lot of Times, Cleaning the MAF Sensor and Finding/Fixing Vacuum Leaks fixes the Problem. , =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈==== How to Fix P0172 =====Engine Code P0172 Saving Repair P..., Nov 12, 2012 · Failed or Faulty Oxygen Sensor (bank 1, sensor 1) Sticking/Plugged or Failed Fuel Injector. Low Fuel Pressure (possible plugged/dirty fuel filter!) Exhaust Leak between Engine and first Oxygen Sensor. Possible Solutions: A lot of Times, Cleaning the MAF Sensor and Finding/Fixing Vacuum Leaks fixes the Problem. , Code P0131 is a result of the oxygen sensor incorrectly detecting the air/fuel ratio of the exhaust. This ratio is sent to the ECM which uses this data, along with comparisons to the outside air, to regulate the air to fuel ratio needed by the engine. This code is the result of this ECM detecting either a voltage outside of the specified range ..., Sep 28, 2023 · A P0172 trouble code indicates that the system is too rich at bank 1. That means that too much fuel is used in the combustion process. Bank 1 shows that the …, Medicine Matters Sharing successes, challenges and daily happenings in the Department of Medicine Nadia Hansel, MD, MPH, is the interim director of the Department of Medicine in th..., May 29, 2022 · Tech Notes. The P0175 code means that more gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0175 is set in along with the P0172 code, it is highly likely that the problem is caused by leaking fuel injectors. If there are no leaking fuel injectors, the next step is to replace the air filter and clean the Mass Air ... , The most common repairs needed to fix the P0171 engine code are as follows: Replacing the fuel pump. Replacing the fuel filter. Replacing the fuel pressure regulator. Replacing the powertrain control module. Replacing one or more injectors. Replacing one or more oxygen sensors. Replacing the mass air flow sensor. Repairing a vacuum leak., Here are some of the most common P0172 causes. Dirty/broken mass air flow (MAF) sensor; Vacuum leak; Fuel delivery or pressure malfunction (High fuel pressure, bad fuel injector) Contaminated/defective oxygen sensor; Bad coolant temperature sensor; How Serious is the P0172 Code?, General Motors (GM) has always been at the forefront of automotive safety, constantly innovating to provide drivers and passengers with the highest level of protection on the road...., Aug 29, 2018 ... ANÁLISIS: P0172 CHEVROLET - Sistema de Entrega de Combustible Rich Banco 1 APREDEREMOS A RECONOCER ESTA CONDICION, identificar valores y ..., P0171 is triggered by the engine bank 1 “upstream” oxygen sensor and P0174 is triggered by the engine bank 2 “upstream” oxygen sensor. The oxygen sensor alerts your system when the condition is too lean meaning there’s too much oxygen in the exhaust. The symptoms and causes will help you determine the exact issue and how to fix it., The fault code P219A indicates a problem with the fuel mixture in the engine. This can cause the engine light to turn on or a service engine soon warning light to appear. One of the most common symptoms of this fault code is excessive fuel consumption. This means that the vehicle may not be as fuel-efficient as it should be, resulting in higher ..., • P0172: Fuel System Rich • P026D: Injection Quantity Too High • P0300: Engine Misfire Detected • P2A00: HO2S Performance Sensor 1 Correction If you encounter such a situation,DO NOTreplace the fuel system as described in Service Bulletin #16-NA-102. Please perform the following fuel system flushing procedure prior to performing further, Diagnostic trouble code P0171 means System Too Lean (bank 1). That means the car computer noticed the engine is running lean. A lean system means the air-fuel ratio entering the combustion chamber is not what the engine wants. It means there is too much air or too little gas to balance the specified mixture ratio., Jan 23, 2015 ... but the hard to start is still there along with the p0172 code. I have a guess that it could be my o2 sensor. I had a hole in the exhauset ..., Reviews, rates, fees, and rewards details for The GM Business Card™. Compare to other cards and apply online in seconds Excellent Credit, Good Credit $0 Get the business card that ..., P1101 is most commonly a clogged pcv orifice underneath the valve cover in my experience. I see orifice issues at a rate of 5:1 compared to other causes of the DTC. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread., This 2013 Chevy Impala has some rough idle problems when hot, and is setting the Fuel System Rich codes P0172 and P0175. 120k miles on the clock.The engine o..., P0172 System Too Rich Bank 1. The P0172 Chevy code can be caused by a leaking fuel injector in the engine’s intake side. Excess fuel will go into the cylinders altering the air-fuel mixture. The oxygen sensor detects the rich condition in the cylinder, and the ECU sends the P0172 code. The P0172 code is a generic OBD-II trouble code and is ..., Nov 21, 2023 · OBD II fault code P0171 is a generic code that is most commonly defined as “System Too Lean- Bank 1”, and is set on gasoline engines when the PCM (Powertrain Control Module) detects that the air/fuel mixture is too lean. In this context, “lean” refers to a condition where there is too much air relative to fuel in the mixture. , What can cause P0172/P0175 Rich DTC? The Delphi Training Series breaks it down for you. To see the whole webinar, visit https://youtu.be/PRD7Z-gUUw4.For more..., The P0172 code appears when the ECU detects insufficient fuel in the combustion mix. Several symptoms will point that there is a problem with a too-rich mix condition in your engine: Check engine light is on. Fuel consumption is increased. Black smoke coming from the exhaust. The strong smell of fuel from the exhaust., On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. Code P0172 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 can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where ..., The method to fix P0172 varies depending on the underlying cause. Here are some potential fixes: Replace a faulty O2 sensor. Clean or replace the MAF sensor. Clean or replace the fuel injectors. Replace the fuel filter or fuel pressure regulator. Repair any vacuum leaks in the engine. Replace a failed fuel pump., The FIXD wireless OBD2 scanner and free app for iPhone and Android translates your check engine light into plain English so you can rest easy. In this video,..., Common Reason: Code P0172 is often related to a vacuum leak. Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel. Too much air and/or too little fuel results in the engine running lean setting P0171 or P0174 trouble codes, while too much fuel and/or too little air results in the ..., Jun 16, 2020 ... Add a comment... 21:37. Go to channel · GM GDI RICH codes P0172 P0175 (Diag & Repair). Pine Hollow Auto Diagnostics•82K views · 20:08. Go to ..., Nov 21, 2018 · Terrain P0172 Code Meaning. Fuel System Too Rich. P0172 is thrown when the oxygen sensors detect that the air-fuel mixture is too rich. A rich fuel mixture contains …