P0171 bmw - BMW E46 p0174 p0171. have a 2002 325i M54 engine and I keep getting these codes even though I have no vacuum leak, new spark plugs and coils, new DISA valve, me O2 sensors, new valve cover gasket and I just installed new OEM fuel pump. Do you guys think this could be caused by bad oil dipstick seal or bad fuel filter.

 
 Limpieza del sensor de oxígeno: La falla P0171 en un BMW puede ser causada por un sensor de oxígeno sucio o contaminado. Limpiar o reemplazar el sensor puede solucionar el problema. Revisión de las conexiones del sensor de oxígeno: Verificar que las conexiones del sensor de oxígeno estén bien ajustadas y sin daños. . Best places to stay in new york

halltristan Discussion starter · Mar 26, 2017 (Edited) For some time now I have repeatedly had a check engine light and the following codes: P0171 Bank 1 system too lean. P0174 Bank 2 system too lean. Everytime I erase the codes, they return in about a week. CCV has been replaced. I clean the MAF sensor every year.Rough idle P0171, p0174. Hi! So I have been dealing with the dreaded P0171 and P0174! My car was running fin until a couple days ago when it acquired a rough and shaky/studdery idle and just got so bad if u tap the gas after a cold start it will die out. The car idles worse when cold and just a little better when warm but still very rough. 考えられる箇所空燃比が薄い状態なので空燃比の学習値、補正値を確認 (空燃比が薄ければ増量側に補正している)O2センサーが機能しているか確認 空燃比を濃い状態にして変化が有るか現在は、空燃比が薄い状態なので電圧は低い状態 約0.3V前後濃いくした ... Definition. Both of these codes are generic, which means they have the same meaning regardless of the vehicle. 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 …Nov 3, 2016 · CALWATERBOY DUE. 10086 posts · Joined 2014. #3 · Oct 26, 2016. Rellimcod said: My check engine light came on this past weekend. I went to AutoZone to read the code. It was P0171 - Bank 1 - running too lean. Autozone recommends cleaning the MAF. But, they could not tell me where the MAF is or how to clean it. 24 Dec 2014 ... Como encontrar codigos de adaptacion y mescla de combustible en un Bmw x3 Martin ase tech 214 207 2619 Reparaciones para Bmw Mercedes y ...I have F30 328IX Sedan. And i have an engine check light that i cannot fix. It is Mixture Control: fuel-air mixture too lean (BMW fault code 118001) and it only appers when you try to move (then you just started your car put it on a drive and begin to move). This fault first came around then i changed my injectors and spark plugs.Sep 6, 2022 · In the most literal sense, the P0171 code means “System Too Lean (Bank 1).”. This trouble code points to a lean running engine condition on the first bank of cylinders. Keep in mind that even inline engines can have two “banks.”. For example, the first 3 cylinders of an inline-6 are sometimes defined as Bank 1, while the 3 cylinders are ... P0174 / 2A2C/29E1: System Too Lean (Bank 2) P0171 / 29EO/2A2B: System Too Lean (Bank 1) P1415 / 2D06: Mass or Volume Air Flow Too Low. As you suggest, too lean (Bank 1 = cylinders 1-3 & Bank 2 = cylinders 4-6) can be due to air leak into the manifold between the MAF and cylinders, OR it could be clogged/dirty injectors.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 …P0171 BMW 227, System Too Lean (Bank 1) P0174 BMW 228, System Too Lean (Bank 2) PENDING. P1083 BMW 202, Fuel Control Limit Mixture Too Lean (Bank 1 Sensor 1) P1085 BMW 203, Fuel Control Limit Mixture Too Lean (Bank 2 Sensor 1) Again, after clearing them and driving for about twenty miles, the …It has a P0171 code system lean bank 1. I have seen lots if threads regarding both P0171 and P0174 but very little for just the one code. I have replaced the precat O2 sensors, changed the MAFs and checked for air leaks but cannot getbto the bottom if the issue. ... Braking: Genuine BMW Rotors, Pagid Yellow RS 19 Endurance Racing Compound ...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 ... 考えられる箇所空燃比が薄い状態なので空燃比の学習値、補正値を確認 (空燃比が薄ければ増量側に補正している)O2センサーが機能しているか確認 空燃比を濃い状態にして変化が有るか現在は、空燃比が薄い状態なので電圧は低い状態 約0.3V前後濃 …4 Dec 2019 ... Trade seems to go for easy fix but high-cost oxygen lambda sensor and MAF sensors then hose leaks. In modern BMW unlikely to have hose leak ...11 Feb 2023 ... I explained how I diagnosed and fixed P0171 code for my 2010 Toyota Corolla for just $2. Support my channel, purchase directly from our ...P0171 - Sistema troppo magro Bancata 1; P0171 - System Too Lean Bank 1; Che cosa significa il codice di errore P0171? Questo codice di errore diagnostico (DTC) è un codice powertrain generico. È considerato generico perché si applica a tutte le marche e modelli di veicoli (dal 1996 in poi), sebbene i passaggi …29 Jan 2021 ... Your browser can't play this video. Learn more.F30 328i Lean code P0171. Two months ago I got 2012 328i with reasonable mileage (135k km), well maintained and overall good condition. At some point timing chain was replaced, also I can see new guides from looking at oil filler. Recently I got CEL with code P0171, searched whole internet for similar issue, but …The p0171 is a fuel mixture too lean. This means that the various sensors in the car intake and exhaust systems is reading a fuel mixture that is less than the ideal 14.7:1 ratio. ... a Bmw will throw a MIL. Causes of P0171 1. The p0171 code is usually caused by 2 things, Vacuum Leak and Fuel Starvation Diagnosis By using the LTFT, STFT and the ...CODE P0171 P0174 SYSTEM TOO LEAN VACUUM LEAK FIX BMW E46 325I 330I 328I 320I 323i 325xi 328xi 330xi 320xi 330CI 325CI 320CI If you have BMW and you have code...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 …10086 posts · Joined 2014. #3 · Oct 26, 2016. Rellimcod said: My check engine light came on this past weekend. I went to AutoZone to read the code. It was P0171 - Bank 1 - running too lean. Autozone recommends cleaning the MAF. But, they could not tell me where the MAF is or how to clean it.OBD2 Diagnostic Trouble Code P0171 indicates that the oxygen sensor in bank 1 has detected a lean condition (the engine either receives too little fuel or too much air). To enable a catalytic converter to operate at optimum efficiency, short-term fuel trim (STFT) and long-term fuel trim (LTFT) correct fuel delivery to the engine and maintain ...I've been chasing the p0171 and p0174 for months now and finally got it all sorted out until recently ONLY the p0171 came back. ... bimmerfest.com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. Content on bimmerfest.com is generated by its users. bimmerfest.com is not in any way affiliated …P0171 Is A System Too Lean (Bank 1) Code On Your Toyota, Which Is Triggered By The First Exhaust Oxygen (02) Sensor (a/k/a Upstream 02 Sensor) On The Bank 1 ...8 posts · Joined 2019. #1 · Dec 8, 2019. Hello everyone! I recently bought a 2011 BMW X5 about a month and half ago. Just had all the timing on it redone after I got it. A lot of the time starting the engine takes a while to fire up. Not like you would think a BMW would start. It has gotten worse and then it threw the code p112f.In conclusion, BMW code P0171 and P0174 are common fuel trim system lean bank 1 and bank 2 codes that require immediate attention. These codes indicate a potential issue with the engine’s fuel delivery system, which can lead to poor fuel efficiency, reduced power, and increased emissions. Addressing these codes …F10 528i P0171 problem. Hello guys! Nice to meet you! I'm new to the BMW world and evidently, to the BMW forums. Recently (just a couple of days actually), I have acquired a 2012 BMW 528ix N20. Everything was ok when I tested it (i didn't go to the BMW dealer for a full verification - I get it, wrong decision), no problems.Feb 1, 2008 · Then it started throwing the P0171 and P0174 codes. I found cracked pipes, intake tubes, etc. Replaced those. Found the fuel cap was actually broken, replaced that. Still no fix to the codes, they always come back within 100 miles of being reset after repairs/maintenance. Like. code P0171/P0174 I have the same vehicle: 01 X5 4.4i M62 112,782 miles with the same problem also these codes are switched sometime from: (P0171/P0174) to (P1158/P1160) or a few time you might see all of them @ once. but running smoothly enough to think how could this engine possibly running like that with a lean condition.Feb 12, 2023 · F30 328i Lean code P0171. Two months ago I got 2012 328i with reasonable mileage (135k km), well maintained and overall good condition. At some point timing chain was replaced, also I can see new guides from looking at oil filler. Recently I got CEL with code P0171, searched whole internet for similar issue, but nothing that can corelate with ... 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 …3 posts · Joined 2017. #1 · Sep 3, 2017. Hey new to forum world. Had a code p0171 on n54 engine. Problem: cracked vacuum line off brake booster line near intake air box. Cracked vacuum line rear turbo waste gate. Loose vacuum lines to vacuum accumulation units. Solution: high grade silicone vacuum lines.What does code P0171 mean on BMW? The P0171 code BMW indicates that the fuel mixture is extremely lean. The code implies that the car’s intake and exhaust system sensors sense a fuel mixture less than the ideal 14.7:1 ratio.P0171 Bank 1 too lean P0174 Bank 2 too lean P1083 Fuel control limit too lean Bank 1 Sensor 1 ... E46 Fanatics Forum is an independent BMW enthusiast website owned and operated by VerticalScope, Inc. Content on E46 Fanatics Forum is generated by its users. E46 Fanatics Forum is not in any way affiliated with Bayerische Motoren Werks AGI read the codes myself and got P0171 and P0174. I've been researching what the codes might mean, and it seems that just about anything could be wrong with my car. ... Carlson The Flyer | BMW CCA # 423862 The problem with common sense is that it's not very common. 2010 335i, ZSP, ZPP, M-Sport, Le Mans Blue, 3 pedals of course! 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 ... Welcome to ShopLifeTV!In this video I go over the most common causes for the p0171 and p0174 codes. These codes are set by the o2 sensors detecting a lean co...BMW code P0171 is assessed as having medium severity. Although not an extremely serious problem, some symptoms can affect performance and driving experience. It is important to judge and handle the problem carefully.5 May 2021 ... ... P0171 in the easiest, quickest, and cheapest way. 2 practical ... P0171. Engine Code TOYOTA P0171: System Too Lean (Bank 1). The fuel system ...Dec 14, 2011 · p0174 with misfire P1343 p1345 p1347. Some of you may know I have been chasing codes p0171 and 174 at startup and cold idle, I replaced the vacuum hose in the back of the intake for the S.A.P along with the endcaps and cleared the codes. After a cold start I got codes p0174 p1343 p1345 1347, I moved the coils around to see if the misfire would ... I've been chasing the p0171 and p0174 for months now and finally got it all sorted out until recently ONLY the p0171 came back. ... bimmerfest.com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. Content on bimmerfest.com is generated by its users. bimmerfest.com is not in any way affiliated …CODE P0171 P0174 SYSTEM TOO LEAN VACUUM LEAK FIX BMW E46 325I 330I 328I 320I 323i 325xi 328xi 330xi 320xi 330CI 325CI 320CI If you have BMW and you have code...Jan 6, 2015 · 16 posts · Joined 2014. #1 · Jan 6, 2015 (Edited) My SES light is on. car runs fine. I bought a code scanner and got p0171, p0174, p1083, and p1085. I was told the maf was at fault so i bought a new one. I erased the codes but the SES light came back on after driving for about 30 minutes. what can it be. Like. A luxury car for drivers and passengers alike. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I agree to Money's Terms of Use and ...BMW E46 p0174 p0171. have a 2002 325i M54 engine and I keep getting these codes even though I have no vacuum leak, new spark plugs and coils, new DISA valve, me O2 sensors, new valve cover gasket and I just installed new OEM fuel pump. Do you guys think this could be caused by bad oil dipstick seal or bad fuel filter.Jan 6, 2015 · 16 posts · Joined 2014. #1 · Jan 6, 2015 (Edited) My SES light is on. car runs fine. I bought a code scanner and got p0171, p0174, p1083, and p1085. I was told the maf was at fault so i bought a new one. I erased the codes but the SES light came back on after driving for about 30 minutes. what can it be. Like. A two-day course at BMW's U.S. headquarters teaches both safety and fun. A free, trimmed down version is coming to a city near you. By clicking "TRY IT", I agree to receive newslet...It has a P0171 code system lean bank 1. I have seen lots if threads regarding both P0171 and P0174 but very little for just the one code. I have replaced the precat O2 sensors, changed the MAFs and checked for air leaks but cannot getbto the bottom if the issue. ... Braking: Genuine BMW Rotors, Pagid Yellow RS 19 Endurance Racing Compound ...The exact fix to the P0171 code varies because quite a few issues can make this code appear. Dirty or worn injectors, worn fuel pumps, defective fuel pressure regulators, a faulty or dirty Mass ...The fuel trim increases the more the accellerator is pushed. It runs smooth and does not show any issues other than the CEL with code P0171. What should be checked or replaced? If it was a vacuum leak I would expect the trim to be lean but the trim is 0 at idle. It starts and runs fine do it does not look like a fuel issue. My car has 106000 miles. Share. Code P0171 indicates Bank 1 of the engine has a lean fuel mixture. P0174 indicates Bank 2 of the engine has a lean fuel mixture. Engine Bank 1 is the same side of the engine as Engine Cylinder 1. Engine Bank 2 is the opposite side of the engine. A firing order and cylinder location diagram may be needed to see which side of the engine is ... After first teasing it a few weeks ago, BMW today officially unwrapped its color-changing car at CES. The BMW iX Flow, as the German automaker has dubbed this experimental vehicle,...P0171 P0174 fixed by just easily replacing one oil separator hose For those with P0171 and P0174 codes, but without known causes yet, you might take a look at the easily accessible lower oil separator valve hose, which goes from the oil separator down to the dipstick tube. ... My 2004 BMW 330Ci was throwing these codes every time I took a trip ...Jan 6, 2015 · 16 posts · Joined 2014. #1 · Jan 6, 2015 (Edited) My SES light is on. car runs fine. I bought a code scanner and got p0171, p0174, p1083, and p1085. I was told the maf was at fault so i bought a new one. I erased the codes but the SES light came back on after driving for about 30 minutes. what can it be. Like. Sep 25, 2011 · The codes I was getting: (lean codes): Not shown are also codes P0300, P0304, P0305 (misfire codes) Things I ruled out: Coilpacks -I switched them around to different cylinders. Made no diff in the codes. Spark plugs - I installed fresh Bosch plugs. Still idles rough. MAF - Cleaned it twice. Ran the car disconnected. BMW CODE P0171 P0174 SYSTEM TOO LEAN FIX. VACUUM LEAK BMW E46 E39 E53 383 X3 X5 Z3 Z4 E60If you have BMW and you have code P0171 System …2001 325i p0171,p0174 lean bank 1 and 2 codes. Hello all, Well my story started with my sons 325i and the ck engine light. Yes lean bank 1&2 codes and a variety of missfire codes. I started with the fuel filter which needed replacement. I noticed quite a vacuum in the crank case.Some people said you should have vacuum and some not.593 posts · Joined 2010. #1 · Dec 14, 2011 (Edited) Some of you may know I have been chasing codes p0171 and 174 at startup and cold idle, I replaced the vacuum hose in the back of the intake for the S.A.P along with the endcaps and cleared the codes. After a cold start I got codes p0174 p1343 p1345 1347, I …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 ...16 Jan 2018 ... Hey guys, today I have a 2007 BMW 328i and I just wanted to share a quick tip for anyone that is having trouble with a check engine light ...Diagnostic trouble code (DTC) P0174 stands for “System Too Lean (Cylinder Bank 2).”. Your vehicle’s powertrain control module (PCM) will log this trouble code if it detects a lean running condition in the engine’s cylinder bank 2. The usual causes of a P0174 code are outdated PCM software, vacuum leaks, a bad mass airflow sensor, …25 Jan 2019 ... I have a BMW F20 118i 1.5 2015 (65 plate) with 30k miles on it. The problem I have is that the engine doesn't idle normally and I am not sure ...NEW CCV KIT: http://amzn.to/1U57cspBMW TOOL: http://amzn.to/2lb9iYLHow to diagnose the common P0171 and P0174 lean codes on a BMW M54 engine. Get rid of the ...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 ...Dec 6, 2018 · Most P0172/P0175 codes are BS. If there is a "real" rich situation, often this is due to a mis-reporting sensor of the wrong/counterfeit part (s) installed, but there are only a few cases where modern computer controlled engines can actually run rich. Almost every part that degrades on a modern vehicle will cause a Lean condition. 10086 posts · Joined 2014. #3 · Oct 26, 2016. Rellimcod said: My check engine light came on this past weekend. I went to AutoZone to read the code. It was P0171 - Bank 1 - running too lean. Autozone recommends cleaning the MAF. But, they could not tell me where the MAF is or how to clean it.25 Jan 2019 ... I have a BMW F20 118i 1.5 2015 (65 plate) with 30k miles on it. The problem I have is that the engine doesn't idle normally and I am not sure ...P0171 is a generic OBD II code that indicates an overly lean air/fuel mixture on Bank 1 of V-type engines, such as BMW models. It can be caused by …Hello, I’m looking for some assistance in diagnosis on my 2001 BMW 330xi before throwing too many parts at the car. I’m getting a P0171 and P0175 at the same time on my car. Im thinking the P0171 is the main problem because from what I’ve read it’s very difficult for modern cars to run rich.Make: BMW. Year: 2001. Engine: 2.5. Already Tried: 2001 bmw 325i i am getting codes p1083 p1085 p0171 p0174 what i have done so far i have replaced the ccv and put a new fuel filter on. before all of this i replaced my valve cover gasket and all these things started to happen i had a smoke test done at the bmw dealership and told me to start ...P0171 - Sistema troppo magro Bancata 1; P0171 - System Too Lean Bank 1; Che cosa significa il codice di errore P0171? Questo codice di errore diagnostico (DTC) è un codice powertrain generico. È considerato generico perché si applica a tutte le marche e modelli di veicoli (dal 1996 in poi), sebbene i passaggi …I read the codes myself and got P0171 and P0174. I've been researching what the codes might mean, and it seems that just about anything could be wrong with my car. ... Carlson The Flyer | BMW CCA # 423862 The problem with common sense is that it's not very common. 2010 335i, ZSP, ZPP, M-Sport, Le Mans Blue, 3 pedals of course!15 May 2019 ... James fixes code P0171 in his 2013 Bmw X5 twin turbo, the code is for a lean condition. James found an easy fix that may help some of you ... Here’s a breakdown of effective troubleshooting steps for a P0171/P0174 trouble code: Check all vacuum hoses for leaks, including seals, lines, and hoses to ensure they are properly attached and connected. You can either listen for hissing sounds created by escaping air while the engine is running, or use a vacuum gauge if you have access to one. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...

Mar 29, 2022 · P00BD, P0171, and P0172 codes won't go away. I have a 2014 320i xDrive with 78,000 miles, and these codes popped up recently. Opened the hood to clean the MAF sensor hoping to solve the issue, and to my surprise, the air intake was completely disconnected with about an inch in between. Pulled it back into place, cleaned the MAF sensor, but the ... . Best tequila for paloma

p0171 bmw

Bei der Reparatur der Ursachen des Fehlercodes P0171 fallen in der Regel folgende Kosten an: neue Kraftstoffpumpe: 400-550 €. Schläuche, Schellen oder Filter: 20-100 €. neuer Sauerstoffsensor: 40-120€. Tausch des Luftmassenmessers: 100-150€. Tausch des AGR-Ventils: 300-850€.The oxygen sensor is usually located connected to the catalytic converter. To get better guidance, you can refer to of Eagles owner’s manual. Once locating the oxygen sensor, remove it carefully and install a new better sensor. Usually, replacing the oxygen sensor is the 2nd common method to fix the P0171 …P0174 / 2A2C/29E1: System Too Lean (Bank 2) P0171 / 29EO/2A2B: System Too Lean (Bank 1) P1415 / 2D06: Mass or Volume Air Flow Too Low. As you suggest, too lean (Bank 1 = cylinders 1-3 & Bank 2 = cylinders 4-6) can be due to air leak into the manifold between the MAF and cylinders, OR it could be clogged/dirty injectors.1.Fugas en la admisión. 2.Problemas en el sistema de inyección de combustible. 3.Presión de combustible inadecuada. 4.Problemas en el filtro de combustible. 5.Fallos en el sensor de oxígeno. 6.Fallos en la válvula PCV. 7.Fallos en el sensor de flujo de masa de aire. 🚗Síntomas del Código OBD2 P0171.Oct 21, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈===== How to Fix P0171 =====Engine Code P0171 Saving Repair... Definition. Both of these codes are generic, which means they have the same meaning regardless of the vehicle. 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 …Causas comunes del código P0171. 1. Sensor de oxígeno defectuoso. 2. Sensor de flujo de aire en masa (MAF) sucio o defectuoso. 3. Fugas de vacío en el sistema de admisión. 4. Inyectores de combustible sucios o defectuosos.The all-new 2023 BMW SUV is set to be the most advanced and luxurious vehicle in the BMW lineup. With its sleek design, powerful engine, and cutting-edge technology, the 2023 BMW S...F30 328i Lean code P0171. Two months ago I got 2012 328i with reasonable mileage (135k km), well maintained and overall good condition. At some point timing chain was replaced, also I can see new guides from looking at oil filler. Recently I got CEL with code P0171, searched whole internet for similar issue, but … In conclusion, BMW code P0171 and P0174 are common fuel trim system lean bank 1 and bank 2 codes that require immediate attention. These codes indicate a potential issue with the engine’s fuel delivery system, which can lead to poor fuel efficiency, reduced power, and increased emissions. Addressing these codes promptly is crucial to prevent ... A P0171 code is set by your vehicle’s powertrain control module when the air-to-fuel ratio is too lean. This means that the engine is receiving too much air into the …A P0171 code is set by your vehicle’s powertrain control module when the air-to-fuel ratio is too lean. This means that the engine is receiving too much air into the …The p0171 is a fuel mixture too lean. This means that the various sensors in the car intake and exhaust systems is reading a fuel mixture that is less than the ideal 14.7:1 ratio. ... a Bmw will throw a MIL. Causes of P0171 1. The p0171 code is usually caused by 2 things, Vacuum Leak and Fuel Starvation Diagnosis By using the LTFT, STFT and the ...考えられる箇所空燃比が薄い状態なので空燃比の学習値、補正値を確認 (空燃比が薄ければ増量側に補正している)O2センサーが機能しているか確認 空燃比を濃い状態にして変化が有るか現在は、空燃比が薄い状態なので電圧は低い状態 約0.3V前後濃 …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 …I was getting P0171 and P0174 and after chasing a few known leaks, I replaced the MAF. Now I'm getting only the P0171, but so far it's only pending. the following LTFT was taken after two minutes has passed in each group, car fully warmed up - @idle bank1/10.1 bank2/1.5 @39mph bank1/8.5 bank2/-3.4 @58 mph bank1/7.0 bank2/0.0..

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