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Loading... Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Published on 11 Feb 2014Scotty Kilmer, mechanic for the last 46 years, shows how you can fix a car that hesitates when accelerating. If your check engine light is on, and has the P0171 code stored, this video is for you.And, If you like my car help, be sure to watch my live car talk show every Saturday morning at 10 AM CST on YouTube. I answer your car questions LIVE there. Just check it out at https://www.youtube.com/watch?v=Vognj... . And remember, every TUESDAY I upload a new video, so don't miss them. Category Cars & Vehicles Licence Standard YouTube Licence Show more Show less Loading... Advertisement Autoplay When autoplay is enabled, a suggested video will automatically play next. Up next How to Diagnose Codes P0171 & P0174 - Lean Bank 1 & 2 - Duration: 9:38. ThePeoplesGarage 556,501 views 9
checklist How to clean car interior Car exterior care tips Preparing a car for a long have a peek here trip Where to find owner's manual Why a car won't http://www.samarins.com/diagnose/p0171.html start Why Check Engine light is on? Check Engine light problems Check Engine http://www.engine-codes.com/p0171.html light trouble codes Glossary of automotive terms More » Used Car Reviews Toyota Corolla 2009-2013 Mitsubishi Lancer 2008-2013 Chrysler PT Cruiser 2001-2010 BMW 3-series 2006-2011 Toyota Camry 1997-2001 Honda Accord 2003-2007 Nissan Altima 2007-2012 Subaru Outback 2005-2009 More » Used SUV and Minivan Reviews Honda CR-V 2002-2006 Toyota Highlander 2001-2007 Toyota RAV4 2006-2012 Mazda p0171 toyota Tribute 2001-2011 Nissan Murano 2003-2007 Ford Escape 2008-2012 Ford Explorer 2006-2010 Toyota FJ Cruiser 2007-2013 More » Home » Check Engine light » OBDII Codes » P0171 Code P0171 - System Too Lean 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 Car Fault Code code P0171 can cause more damage to your vehicle over time, as when the engine runs lean, the combustion temperature is much higher. • Symptoms • Causes • Diagnostic • What is a vacuum or intake leak? • Common problems causing the code P0171 • Basic car knowlege: how the air/fuel ratio is adjusted • Long and Short fuel trims • What do terms "Bank 1" and "Bank 2" mean? Symptoms: Typical symptoms of the lean air fuel mixture include: - Lack of power - Rough idle - Hissing noise from the engine (vacuum leaks) - Stalling - Difficulty starting - Engine knock or detonation (pinging) under load - Engine running hot Causes: Common causes include: - Intake or vacuum leaks - Clogged or faulty Mass Air Flow sensor (MAF) - Faulty PCV valve - Stuck open purge valve/solenoid - Faulty oxygen sensor - Improperly installed aftermarket cold intake - Low fuel pressure - Clogged catalytic converter How the code P0171 is diagnosed: With a good scan tool that shows the live data diagnosing the code P0171 is fairly easy. Without a scan tool, the only way to find the problem is to check the basics and research common problems
air leaks- Faulty front heated oxygen sensor- Ignition misfiring- Faulty fuel injectors- Exhaust gas leaks- Incorrect fuel pressure- Lack of fuel- Faulty Mass Air Flow (MAF) sensor- Incorrect Positive Crankcase Ventilation (PCV) hose connection What does this mean? Tech notes If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced. What does this mean? When is the code detected?- Fuel injection system does not operate properly.- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.) Possible symptoms- Engine Light ON (or Service Engine Soon Warning Light)- Excessive Fuel Consumption P0171 Description With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the Malfunction Indicator Light (MIL) (2 trip detection logic). P0171 Information for specific makes P0171 ACURA Fuel Injection System Too Lean Bank 1 P0171 AUDI System Too Lean Bank 1 P0171 BMW Mixture Control System Too Lean P0171 BUICK Fuel Trim System Lean Bank 1 P0171 CADILLAC Fuel Trim System Lean Bank 1 P0171 CHEVROLET Fuel Trim System Lean Bank 1 P0171 CHRYSLER Fuel System 1/1 Lean P0171 DODGE Fuel System 1/1 Lean P0171 FORD Fuel Injection System Too Lean Bank 1 P0171 GMC Fuel Trim System Lean Bank 1 P0171 HONDA Fuel Injection System Too Lean Bank 1 P0171 HUMMER Fuel Trim System Lean Bank 1 P0171 HYUNDAI System Too Lean Bank 1 P0171 INFINITI Fuel Injection System Too Lean Bank 1 P0171 ISUZU Fuel Trim System Lean Bank 1 P0171 JAGUAR System Too Lean Bank 1 P0171 JEEP Fuel System 1/1 Lean P0171 KIA Bank 1 System Too Lean P0171 LAND-ROVER System Too Lean Bank 1 P0171 LEXUS Air/Fuel Mixture System Lean Bank 1 P0171 LINCOLN Fuel Injection System Too Lean Bank 1 P0171