Gm p0172-00

P0191 is a common OBD-II code. It indicates that the fuel rail pressure sensor is receiving a signal that is outside of its normal range. This is a generic code, which indicates that it has the same meaning for the GMC Terrain as it would any other vehicle. P0191 is typically caused by a bad fuel pressure sensor, fuel pressure regulator, or an ...

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 ...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.OBD-II Trouble Code P0171 Description. System Too Lean (Bank 1) A P0171 code indicates the air-fuel ratio entering your engine block is not ideal. Two main issues typically cause this code. There is either too much air or not enough fuel in the lines to create the right ratio. When there’s too much air, you’ll often find a vacuum leak ...Cross reference GM parts numbers by entering the part number and selecting the make of the car on the Part Number Search page on GMPartsOnline.net. The site cross references the su... 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 ... Customer Complaint: This 2019 Chevrolet Traverse with a 3.6 liter engine came into the shop with a complaint of a check engine light and stalling problem. The customer states that the vehicle will randomly shut off. The codes in this vehicle were: P0171 - Fuel Trim System Lean Bank 1. P0174 - Fuel Trim System Lean Bank 2.

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 ... 2017 L5P Duramax Code P026D. and another one. P026D Issue. In my experience, the changing the MAP, MAF and NOX sensors did not help P026D. If you check the fuel filter and find small brass bits then changing the filter and a fuel flush may help (see 18-NA-361). They did this for me and the code went away for about 9 months.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.P0011 definition: Intake Camshaft Timing- Over-Advanced Bank 1. Issue Severity: SEVERE – Stop driving immediately. Repair Urgency: Fix this code immediately (same-day if possible) to avoid damage to multiple internal engine components. Diagnosis: This trouble code severely impacts the drivability of your vehicle.This 15 Silverado was setting codes P0172 and P0175 for running rich on both banks. Testing revealed fuel in the crankcase due to a leaking high pressure fue...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...Greetings viewers! In this video I highlight a 2017 Chevy Trax Premier 1.4L equipped AWD vehicle which arrived with the customer complaint of hard starting a...

A P0172 code indicates that the fuel system is excessively rich or inadequate air in the engine’s air-fuel mixture. The code appears when there is too much fuel in the exhaust gas flowing from the combustion chamber. The code could imply the following. A vacuum leakage near the engine. The fuel system is operating weak.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.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, ...The fuel rail pressure sensor keeps the powertrain control module (PCM) aware of the pressure levels in the fuel rail, so that the computer knows how much fuel the engine needs. When the PCM receives an irrational signal from the fuel rail pressure sensor, the module logs the P0191 code. What Does the P0191 Code Mean?I have a 2017 Cruze with the 1.4L turbo. Check engine light came on and when I checked the code, I initially had a P1101. I opened up the air filter box and cleaned it out, inspected the filter and MAF sensor, looked for any signs of damaged electrical wiring or hoses, etc. Decided to go ahead and order a MAF sensor and new air filter (not sure ...

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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.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.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 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 ...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.

This article explains the P0172 code symptoms, causes, and fixing cost. P0172 Code Definition. The P0172 code stands for “Fuel System Too Rich (Bank 1)”. Bank 1 represents the side of the engine that contains cylinder no. 1. The O2 sensor measures the amount of air in the exhaust gases that are in the engine cylinder. What Does the P0172 ...Does anyone know if the I can check to see if service update #06162 (virtual flex fuel sensor) was actually installed in my truck as GM says it ...General Motors has developed a self-driving car called the Cruise AV that has no steering wheel or pedals. Learn more at HowStuffWorks. Advertisement Get ready for a self-driving c...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,...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.General Motors has developed a self-driving car called the Cruise AV that has no steering wheel or pedals. Learn more at HowStuffWorks. Advertisement Get ready for a self-driving c...What does the P0171 code mean? A Code P0171 or system too lean bank 1 means either too much oxygen or too little fuel in the exhaust. This is a ‘lean’ condition or a ‘low fuel trim’ code. The P0171 OBD-II code indicates that the fuel system on the first bank of the engine is weak or that a vacuum leak exists near this side of the engine. A lean state happens …The Most Hardcore Porsche 718 Cayman GT4 RS Finally Lands In America The Manthey-Racing kit for the Porsche 718 Cayman GT4 RS costs more than a new Civic Type R, and it doesn't even …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.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, ...

Customer Complaint: This 2019 Chevrolet Traverse with a 3.6 liter engine came into the shop with a complaint of a check engine light and stalling problem. The customer states that the vehicle will randomly shut off. The codes in this vehicle were: P0171 - Fuel Trim System Lean Bank 1. P0174 - Fuel Trim System Lean Bank 2.

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. Sep 22, 2016 · 891. 183K views 7 years ago. In this video we discuss the most common cause of a GMC or Chevy flex fuel equipped vehicle with a check engine light illuminated …3 days ago · The P0172 means too much fuel is entering the combustion chamber. So, one of the obvious symptoms is a high fuel consumption rate. This means constant visits to gas stations and extra bucks. Rough idling. …Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Equinox’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.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 ...Diagnosing trouble codes: P0172 (System too Rich Bank 1) and/or P0175 (System too Rich Bank 2) can be a challenge on your GM 4.3L, 5.0L, 5.7L equipped GM pick-up, van, SUV or mini-van. What complicates getting to the bottom of what's causing these two codes to pop up, is that they don't accuse one specific component as being bad.May 22, 2020 ... In today's vlog, we try to figure out why the 2001 Pontiac Aztek GT with the GM 3.4 Liter V6 threw a P0172 ... 1:00:24. Go to channel · Seller ...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.1 hour ago · キーウを訪れていたブリンケン米国務長官は15日、 ウクライナ に総額20億ドル（約3100億円）の資金を提供する新たな軍事支援を発表した ...

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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.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.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. …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 ...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 ... 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.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. Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Equinox’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.Jun 25, 2023 · Causes: Common causes include: - Faulty Air/Fuel ratio sensor. - Failed or dirty fuel injectors. - Engine oil level is too high. - Presence of fuel in engine oil due to short driving intervals. - Faulty Mass …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. ….

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 ...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.Aug 29, 2018 ... ANÁLISIS: P0172 CHEVROLET - Sistema de Entrega de Combustible Rich Banco 1 APREDEREMOS A RECONOCER ESTA CONDICION, identificar valores y ...... grams per second. Test temperature sensors for accuracy: With the engine cold (preferably after sitting overnight) use a scan tool or a multimeter to monitor ...Te suministramos todo lo que necesitas saber sobre el código DTC P0171: ️ Descripción, ️ causas, ️ síntomas y ️ posibles soluciones.LEER SOLUCIÓN DEL CÓD...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 filter and clean the Mass Air Flow ...Tesla's market capitalization was roughly $89 billion at Wednesday's close, $2 billion higher than the market values of Ford and GM combined. Jump to Tesla's recent stock rally has...This article explains the P0172 code symptoms, causes, and fixing cost. P0172 Code Definition. The P0172 code stands for “Fuel System Too Rich (Bank 1)”. Bank 1 represents the side of the engine that contains cylinder no. 1. The O2 sensor measures the amount of air in the exhaust gases that are in the engine cylinder. What Does the P0172 ... Gm p0172-00, Greetings viewers. In this video I dove into a 2014 Chevy Express with the 5.3L engine having a check engine light illuminated and stored codes P0172 and P01..., 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., The P0171 code is triggered when the air-to-fuel ratio of your vehicle is too lean. The PCM receives signals from the oxygen sensors in your engine bay and adjusts the air and fuel mix accordingly. The P0171 code is usually accompanied by the P0170 code as this simply states that a fuel trim anomaly has been detected., Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Equinox’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., Oxygen Sensor – The P0175 code is thrown when the B2S1 O2 sensor does not register the right amount of oxygen in the exhaust. The computer will still adjust the air/fuel mixture to compensate. A bad O2 sensor will show a lean mixture more often, though. Mass Air Flow Sensor – Your Tahoe’s mass air flow sensor calculates the volume of air ..., Does anyone know if the I can check to see if service update #06162 (virtual flex fuel sensor) was actually installed in my truck as GM says it ..., The P0172 code indicates that the ECM/PCM is or has detected a rich condition. If the air/fuel ratio isn’t balanced and there is too much fuel, each hydrocarbon molecule may only get “married” to one oxygen molecule, forming CO, which is poison., May 29, 2022 · 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 …, The P0172 code stands for “Fuel System Too Rich (Bank 1)”. What this means in plain language is that there’s too much fuel being delivered to combustion chambers on bank 1, or not enough air. A car engine requires a 14.7:1 air to fuel ratio to work optimally. There are sensors that monitor the amount of air coming in, and the ECU …, 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 ..., 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 ..., 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 ..., Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Equinox’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., P0172 Parts Cannon activated! - Solved. I'm stumped. I have a 2018 Cruze, automatic, 48000ish miles. Throwing P0172, but intermittently. New MAF, MAP, upstream O2 sensor, air filter. Still comes on. Oddly, code …, 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 ..., 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 ..., Gm gmc buick cadillac motors general chevy cycle company drive brand round complete september led global supply resist electric 2017 buick cascada 1.6l turbo P0171 lean too system sensor bank gm fuel troublecodes located where maf 2021 97 buick century 3.1 code p0401 fix ... position actuator for a 2015 buick verano is it the How i …, Jul 18, 2018 · Oxygen Sensor. The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Equinox’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. , 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 ..., In this video I have a look at a 2008 Chevrolet Silverado 1500 5.3 that came in with codes P0171 and P0174 indicating that the engine is running lean. It doe..., GM has a fix for a P0172 trouble code and fuel in oil, rough idle, and engine run-on. GM has issued a service bulletin #PIP4783B to address a P0172 trouble code and fuel in oil, rough idle, and engine run-on the GM vehicles listed below. Before you perform any diagnostic tests, pull the engine oil dipstick, and check for the presence of fuel., Cuando escaneas tu coche con un OBD 2 y aparece lo siguiente: “ Código P0172 Sistema demasiado rico. Banco 1 ”, lo que significa es que el motor está funcionando con una mezcla demasiado rica en combustible. Como te lo mencionamos arriba, esto se debe principalmente a dos cosas: Demasiado combustible en la mezcla. Muy poco oxígeno en la ..., 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 ..., Blasirl. 15883 posts · Joined 2015. #2 · Feb 18, 2020. Welcome Aboard! 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 …, 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. , #2 · Sep 12, 2023. If oil is not dark then maybe an oil change would work. Acutator solenoid is more common. Genuine GM parts only, aftermarket are hit or miss even new out of the …, P0175 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., General Motors has developed a self-driving car called the Cruise AV that has no steering wheel or pedals. Learn more at HowStuffWorks. Advertisement Get ready for a self-driving c..., First, we have to establish whether or not the P0171 code is active. You can have this done by most parts stores or by a quick scan from a local shop. If the only stored code is P0171, we can ..., What Does Code P0175 Mean? P0175 definition: Bank 2 has too much fuel or not enough air; 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 …, 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 – 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) is running lean. On inline engines, this code is not available, since there is only one ..., 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.