While some trouble codes leave vehicle owners with a plethora of possible causes, the P0449 code likely only has one of three possible causes. First, the vent valve in the evaporative emissions system might be faulty. Second, the connection, wires, or circuits in the system might be having a connectivity issue that is causing a false reading. When an OBD-II equipped vehicle has a stored P015B code, it means that the powertrain control module (PCM) has detected a delayed response time from the upstream (first one after the exhaust leaves the engine, in front of catalytic converter) oxygen (O2) sensor or circuit for engine bank one. Bank 1 specifies the bank of the engine which ...This diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. The DTC P0452 is relates to an emission system malfunction. Your PCM or powertrain management computer ...If diagnosing for oil leaks and/or DTC P1101 with no engine oil leaks and excessive positive crankcase pressure exists, an obstructed PCVorifice (1) would be suspect requiring a PCVorifice replacement. 5519694 1. Remove the camshaft cover (1). Refer toCamshaft Cover Replacement in SI. 2. Remove the PCVorifice (2) and inspect for blockage. 3.Sep 16, 2019 · Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. A lean code or codes suggest that there surely is too-much air in the exhaust. Bear in mind parts shops have staff members having good motives nonetheless they may not have the experience necessary to ... P0171 indicates that your Chevy Corvette 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. If you have one or more fuel injectors that have gone bad, that can ...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.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. If you have one or more fuel injectors that have gone bad, that can ...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.Jul 25, 2020 · A P1174 & P1175 trouble code means that your air to fuel ratio is either running too lean or too rich. Engines will have two banks. In traditional V-shaped engines, the 2-4 cylinders (depending on whether it is a V4 or V8, etc.) on the left side are considered “Bank 1” and the cylinder on the left are considered “Bank 2”. Jun 12, 2023 · The MAP sensor signal should be 1 to 4.5 volts, heading back to the PCM, depending on what load the engine is running at. If the P0106 code is set, it means that the signal went below or above that for a predetermined amount of time. This code is defined as generic by the SAE (Society of Automotive Engineers). Diagnosis: Driving with trouble code P0137 is acceptable but only for a short period of time. Driving with this code for an elongated period of time could result in greater engine damage if it is being caused by a lean air/fuel ratio. Common Reason: Code P0137 is often related to a bad O2 Sensor. Oxygen sensor 2 is the downstream oxygen sensor ...Feb 27, 2023 · 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. Apr 9, 2020 · The most common causes for this code are a vacuum leak, a bad oxygen sensor, and a failed mass air flow sensor. Code p0171 in a chevy sonic means that the fuel system is running too lean. First scaned 7 codes for oxy sensor,, erased all and scaned again all seven came backCheck ecm-3 fuse. Number 24 fuse Replace the blown, all codes for oxy ... Potential causes of a P0496 EVAP code include: Faulty purge or vent solenod/valve. Plugged EVAP canister. Failed EVAP / fuel pressure sensor. Poor electrical connection. Short electrical circuit condition. (Hyundai, Isuzu) Faulty canister purge valve. Blocked vapor canister. P0171, according to the manual, is a "Fuel System Lean" diagnostic trouble code. In other words, the engine computer, through the O2 sensor and MAF sensor (mass air flow) adjust your fuel mixture just like a carburetor used to in the "olden days". Causes: MAF sensor. Aftermarket intake or air filter.Apr 22, 2023 · The P0420 trouble code is more common in some car models than others. Certain car models are known to have a problem with this diagnostic trouble code. Here is a list of the most common causes by car brands. Remember that these are only general guidelines, and you should make a diagnosis before replacing any parts. 1. Chevrolet Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. A lean code or codes suggest that there surely is too-much air in the exhaust. Bear in mind parts shops have staff members having good motives nonetheless they may not have the experience necessary to ...When an OBD-II equipped vehicle has a stored P015B code, it means that the powertrain control module (PCM) has detected a delayed response time from the upstream (first one after the exhaust leaves the engine, in front of catalytic converter) oxygen (O2) sensor or circuit for engine bank one. Bank 1 specifies the bank of the engine which ... Potential causes of a P0496 EVAP code include: Faulty purge or vent solenod/valve. Plugged EVAP canister. Failed EVAP / fuel pressure sensor. Poor electrical connection. Short electrical circuit condition. (Hyundai, Isuzu) Faulty canister purge valve. Blocked vapor canister. 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.El código P0171 se produce cuando la cantidad de combustible inyectado es insuficiente en comparación con la cantidad de oxígeno presente en la mezcla, es decir, el inyector no está enviando la cantidad de gasolina suficiente. Es por ello que en el scanner automotriz te aparece el término "mezcla pobre banco 1" del código P0171. 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.Jun 12, 2023 · The MAP sensor signal should be 1 to 4.5 volts, heading back to the PCM, depending on what load the engine is running at. If the P0106 code is set, it means that the signal went below or above that for a predetermined amount of time. This code is defined as generic by the SAE (Society of Automotive Engineers). Jul 21, 2018 · Fuel Injectors. P0171 indicates that your GMC Envoy 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. If you have one or more fuel injectors that have gone bad ... This diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. The DTC P0452 is relates to an emission system malfunction. Your PCM or powertrain management computer ...The most common causes for this code are a vacuum leak, a bad oxygen sensor, and a failed mass air flow sensor. Code p0171 in a chevy sonic means that the fuel system is running too lean. First scaned 7 codes for oxy sensor,, erased all and scaned again all seven came backCheck ecm-3 fuse. Number 24 fuse Replace the blown, all codes for oxy ...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...The cost of P11011 issues on a Chevy Cruse depends on the cause. OEM air filters cost less than $30 for all engine types, so this is a budget-friendly place to start diagnosing the problem. An OEM ... 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.The MAP sensor signal should be 1 to 4.5 volts, heading back to the PCM, depending on what load the engine is running at. If the P0106 code is set, it means that the signal went below or above that for a predetermined amount of time. This code is defined as generic by the SAE (Society of Automotive Engineers).P0496 definition: EVAP Flow During a Non-Purge Condition. Issue Severity: LOW – Continued driving for a short period of time is okay. Repair Urgency: Get this fixed within the next month to prevent catalytic converter damage. Diagnosis: There may not be any noticeable driving issues with your vehicle, but your engine could be running rich ...Oct 24, 2008 · SOURCE: Ford windstar OBD II code P1537/38, P0171 and P0420. It could all be related.P1537/38 are the intake manifold runner controls are stuck open.They are controlled by vacuum solenoids.The P0171 is bank one of the engine is running lean,usually caused by a vacuum leak, P0420 is catalytic converter efficiency code. When an OBD-II equipped vehicle has a stored P015B code, it means that the powertrain control module (PCM) has detected a delayed response time from the upstream (first one after the exhaust leaves the engine, in front of catalytic converter) oxygen (O2) sensor or circuit for engine bank one. Bank 1 specifies the bank of the engine which ...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. Your car or truck has either a P0171, P0174 lean fault code or both stored in the pc, these codes derive from Oxygen Sensor (O-2) readings. A lean code or codes suggest that there surely is too-much air in the exhaust. Bear in mind parts shops have staff members having good motives nonetheless they may not have the experience necessary to ...Feb 26, 2022 · 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. Learn what Trouble Code P0101 means, the cause, and how to fix it. Read More . Diagnostic Code P0302: Cylinder 2 Misfire Detected.The following are the most common causes of the P0174 code. Faulty mass airflow (MAF) sensor. Blockage in the fuel filter and fuel injectors. The fuel pump is getting weak. Weakening fuel pressure regulator. The vacuum connector or PCV line may have cracks or damage. Defective oxygen sensor. Issues with PCM.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 Performance.May 21, 2023 · The P0700 code indicates that the transmission control module (TCM) detected a problem with the transmission parameters. It communicates with the engine control module (ECM) to set the Malfunction Indicator Lamp (MIL) when the fault is detected. P0700 is not a specific code. 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.One of the most common trouble codes with the Chevy Malibu is P0171. It indicates that your Chevy Malibu 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. P0171 is a known issue in Malibu’s with ...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.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 18, 2018 · 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 ... Mar 29, 2015 · My initial thought was that P0017 was causing P0171. When I reset the codes, 0017 would come back within a minute of running the engine. 0171 would show up after driving the vehicle for 30-40 miles. I first focused on 0017. I've changed the actuator solenoid ( 3 times), camshaft position sensor, crankshaft sensor. Apr 9, 2020 · The most common causes for this code are a vacuum leak, a bad oxygen sensor, and a failed mass air flow sensor. Code p0171 in a chevy sonic means that the fuel system is running too lean. First scaned 7 codes for oxy sensor,, erased all and scaned again all seven came backCheck ecm-3 fuse. Number 24 fuse Replace the blown, all codes for oxy ... The powertrain control module (PCM) uses that reading along with other sensor parameters to ensure proper fuel delivery at any given time for optimum power and fuel efficiency. Basically this P0101 diagnostic trouble code (DTC) means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF ...Causes of Code P0171. The vacuum system is the first area to check when your vehicle stores a P0171 code. A small tear or crack in the vacuum lines causes extra air to enter the system. A leak that causes diagnostic trouble code P0171 could be anywhere around the engine intake, including the PCV hoses, vacuum hoses, and the intake manifold gasket.DTC P0171 – How To Service a Cadillac ATS MAF. The OBDII check engine code P0171 will trigger the Malfunction Indicator Lamp (MIL) and this GM trouble code is indicating that there’s something wrong with your Cadillac’s fuel trims. More specifically, the code is for Bank 1 in your engine running too lean, or not having enough fuel for ...May 16, 2020 · The video focuses on the basic GMC specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight into prog... OBD II fault code P0455 is a generic code that is defined as “Evaporative Emission System Leak Detected (large leak), and is most commonly set when the PCM (Powertrain Control Module) detects a large leak in the evaporative emissions control system. NOTE: Note that on many applications, this code has a dual definition, in the sense that it ...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.Mar 28, 2022 · Diagnosis: Driving with trouble code P0137 is acceptable but only for a short period of time. Driving with this code for an elongated period of time could result in greater engine damage if it is being caused by a lean air/fuel ratio. Common Reason: Code P0137 is often related to a bad O2 Sensor. Oxygen sensor 2 is the downstream oxygen sensor ... 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. 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...Potential causes of a P0496 EVAP code include: Faulty purge or vent solenod/valve. Plugged EVAP canister. Failed EVAP / fuel pressure sensor. Poor electrical connection. Short electrical circuit condition. (Hyundai, Isuzu) Faulty canister purge valve. Blocked vapor canister.GMC Acadia 2012 - 2017 All All 3.6 LLT All GMC Canyon 2015 - 2016 All All 3.6 LFX All GMC Terrain 2015 - 2017 All All 3.6 LFX All Involved Region or CountryNorth America Condition A customer may bring their vehicle to the dealer with a complaint of an SES light on. Upon diagnosis the technician may find DTC’s P0171 and/or P0174 stored in the ECM.Jul 25, 2020 · A P1174 & P1175 trouble code means that your air to fuel ratio is either running too lean or too rich. Engines will have two banks. In traditional V-shaped engines, the 2-4 cylinders (depending on whether it is a V4 or V8, etc.) on the left side are considered “Bank 1” and the cylinder on the left are considered “Bank 2”. The video focuses on the basic GMC specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight into prog...Subject: Information on Malfunction Indicator Lamp (MIL) Illuminated - DTC P0171 Set This Bulletin replaces PIP5197M. Please discard PIP5197M. Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Buick Encore 2013 2019 1.4L (LUJ, LUU, LUV) Cadillac ELR 2014 2017 Chevrolet Cruze 2011 2016 Sonic 2012 2019 Trax 2013 2019 Volt 2012 2015Mar 28, 2022 · P0131 definition: O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1) Issue Severity: MODERATE – Extended driving with this code may cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid emission system and catalytic converter damage. Diagnosis: Driving with trouble code P0131 is acceptable but only for a ... Jun 12, 2023 · The MAP sensor signal should be 1 to 4.5 volts, heading back to the PCM, depending on what load the engine is running at. If the P0106 code is set, it means that the signal went below or above that for a predetermined amount of time. This code is defined as generic by the SAE (Society of Automotive Engineers). The most common causes for this code are a vacuum leak, a bad oxygen sensor, and a failed mass air flow sensor. Code p0171 in a chevy sonic means that the fuel system is running too lean. First scaned 7 codes for oxy sensor,, erased all and scaned again all seven came backCheck ecm-3 fuse. Number 24 fuse Replace the blown, all codes for oxy ...What the P1101 code means. When a P1101 trouble code is stored, it means that the PCM detected a discrepancy with the voltage from the MAF sensor. This problem can be detected while the PCM is running a self diagnostic called a Key On Engine Running (KOER) test. When the voltage from the MAF sensor is greater or lesser than the voltage allowed ... The cost of P11011 issues on a Chevy Cruse depends on the cause. OEM air filters cost less than $30 for all engine types, so this is a budget-friendly place to start diagnosing the problem. An OEM ...Mar 28, 2022 · Diagnosis: Driving with trouble code P0137 is acceptable but only for a short period of time. Driving with this code for an elongated period of time could result in greater engine damage if it is being caused by a lean air/fuel ratio. Common Reason: Code P0137 is often related to a bad O2 Sensor. Oxygen sensor 2 is the downstream oxygen sensor ... Chevrolet Silverado 1500 2014 2014 Silverado 2015 2018 Silverado LD 2019 2019 Silverado 2500/3500 2019 2019 Suburban 2015 2020 Tahoe GMC Sierra 1500 2014 2014 Sierra 2015 2018 Sierra Limited 2019 2019 Sierra 2500/3500 2019 2019 Yukon Models 2015 2020 Involved Region or Country North America, Europe, Russia, Middle East, Chile, Colombia, Ecuador ... Feb 21, 2022 · 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 ... Other Notes About the P0171 Trouble Code. Don’t ignore a P0171 code—address it as soon as possible. A poorly running engine due to a lean fuel mixture can fail if left untreated. A small, inexpensive problem could worsen and make your vehicle undrivable. Instead of shrugging it off, remember that an OBD-II code P0171 is a serious issue that ...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. 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. While some trouble codes leave vehicle owners with a plethora of possible causes, the P0449 code likely only has one of three possible causes. First, the vent valve in the evaporative emissions system might be faulty. Second, the connection, wires, or circuits in the system might be having a connectivity issue that is causing a false reading. The vehicle being worked on is a 2004 Chevy Suburban with a 5.3L engine. It had multiple trouble codes in memory P0171 and P0174 (fuel system too lean bank 1...P0171, according to the manual, is a "Fuel System Lean" diagnostic trouble code. In other words, the engine computer, through the O2 sensor and MAF sensor (mass air flow) adjust your fuel mixture just like a carburetor used to in the "olden days". Causes: MAF sensor. Aftermarket intake or air filter.The cost of P11011 issues on a Chevy Cruse depends on the cause. OEM air filters cost less than $30 for all engine types, so this is a budget-friendly place to start diagnosing the problem. An OEM ...Aug 31, 2023 · How to Fix the U0107 Code. Before attempting to do any repairs, know that the repair processes for OBD-II trouble codes can vary greatly. There’s no single way to cure the problems causing any DTC because different vehicle models are designed differently. Chevrolet Codes; Trouble Code Fault Location Probable Cause; B1325: Control Module Power Circuit Low/High Voltage: P0014: Camshaft position (CMP) exhaust/right/rear, bank 1 -timing over -advanced/system performance: P0171: System too lean, bank 1: Intake/exhaust leak, AIR system, MAFNAF sensor, fuel pressure/pump, injector(s), HO2S: P0174 ... P0131 definition: O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1) Issue Severity: MODERATE – Extended driving with this code may cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid emission system and catalytic converter damage. Diagnosis: Driving with trouble code P0131 is acceptable but only for a ...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. Oct 25, 2019 · Brian Eslick from How to Automotive http://www.howtoautomotive.com takes you step-by-step through the process of diagnosing code P0171-P0174 lean bank 1 and ...
El código P0171 se produce cuando la cantidad de combustible inyectado es insuficiente en comparación con la cantidad de oxígeno presente en la mezcla, es decir, el inyector no está enviando la cantidad de gasolina suficiente. Es por ello que en el scanner automotriz te aparece el término "mezcla pobre banco 1" del código P0171.. Ikepercent27s big mouth
What the P2270 code means. P2270 is an OBD-II generic code for the O2 sensor signal stuck lean on bank 1 sensor 2 to the engine control module (ECM). This means that the O2 sensor in bank 1 sensor 2 indicates either too much oxygen in the exhaust stream, an open circuit, or a defective sensor which causes a lean signal to the ECM.OBD II fault code P0455 is a generic code that is defined as “Evaporative Emission System Leak Detected (large leak), and is most commonly set when the PCM (Powertrain Control Module) detects a large leak in the evaporative emissions control system. NOTE: Note that on many applications, this code has a dual definition, in the sense that it ...Chevrolet Codes; Trouble Code Fault Location Probable Cause; B1325: Control Module Power Circuit Low/High Voltage: P0014: Camshaft position (CMP) exhaust/right/rear, bank 1 -timing over -advanced/system performance: P0171: System too lean, bank 1: Intake/exhaust leak, AIR system, MAFNAF sensor, fuel pressure/pump, injector(s), HO2S: P0174 ... 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...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. P0171 indicates that your GMC Sierra 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. If you have one or more fuel injectors that have gone bad, that can cause ...May 16, 2020 · The video focuses on the basic GMC specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight into prog... An engine code P0171 may be caused by one or more of the following: A vacuum leak in the intake manifold or elsewhere in the engine. A leaking or dirty mass airflow sensor (MAF). An exhaust gas recirculation (EGR) system that is not working properly. A faulty oxygen sensor.Feb 26, 2016 · The vehicle being worked on is a 2004 Chevy Suburban with a 5.3L engine. It had multiple trouble codes in memory P0171 and P0174 (fuel system too lean bank 1... The following are the most common causes of the P0174 code. Faulty mass airflow (MAF) sensor. Blockage in the fuel filter and fuel injectors. The fuel pump is getting weak. Weakening fuel pressure regulator. The vacuum connector or PCV line may have cracks or damage. Defective oxygen sensor. Issues with PCM.Automobile Repair Shop Owner. Code. Fault Location. Probable Cause. P0171. Fuel System Too Lean Bank 1. (Buy Part On Amazon) Intake/exhaust leak, AIR system, MAFNAF sensor, fuel pressure/pump, injector (s), HO2S. We recommend Torque Pro.This DTC can be triggered by a number of problems including a faulty MAF sensor, clogged fuel injectors, vacuum leaks, and more. Common Reason: Code P0174 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.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..