Po171 code

Sep 23, 2021 · When the ECM/PCM is having to add too much fuel based on input from the O2 sensor, the fault code P0171 will be sent to the ECM, which will trigger the check engine light to illuminate. This code could either mean that the oxygen sensor is detecting too much oxygen or too little fuel in the mixture. Feb 26, 2022 · P0171 Causes Faulty or dirty mass airflow sensor Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. Weak fuel pump Clogged or dirty fuel injectors Clogged fuel filter Exhaust leak Faulty oxygen sensor Faulty air-fuel ratio sensor P0171 Symptoms Check Engine Light is on or flashing Lack of power from the engine Rough idle Anyone know what this code indicates. I had the CEL light on and the TCS light on intermittantly. Code PO171 or P0172. Quite a few components could throw this code and P0171/P0172 could be a...Since the P0171 code is the only code set currently, we can assume the problem is something that will only affect bank 1. That generally rules out many causes, such as most of the fuel system related causes except for maybe a bad injector.Below are 46 working coupons for Po171 And Po174 Engine Code from reliable websites that we have updated for users to get maximum savings. Take action now for maximum saving as these discount...Feb 13, 2022 · The P0171 error code is telling you that a lean condition exists, which means the ratio of air to fuel is off, and there's too much air in the system. In this article, we're going to break down what the symptoms, causes, and possible solutions are for this error code so that you can get your Volkswagen properly functioning again. Symptoms PaleVioletRed1. 255 130 171. MediumPurple1. 171 130 255. #AB82FF.Feb 13, 2022 · The P0171 error code is telling you that a lean condition exists, which means the ratio of air to fuel is off, and there's too much air in the system. In this article, we're going to break down what the symptoms, causes, and possible solutions are for this error code so that you can get your Volkswagen properly functioning again. Symptoms Van running fine and one day pulling out of the garage got P0301,P0171 codes. So I switch coil packs and plugs with #1 and #2 cylinder = no change.When the code P0171 is read, it means that the Oxygen sensor on bank one has recognized a lean mixture beyond its capacity to correct. Usually, the Oxygen O2 sensors should and do correct a fuel mixture of +-15%. However, if the air-fuel mixture is beyond these confines, the P0171 code will be stored. aaa auto repair couponThe 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. Feb 26, 2022 · P0171 Causes Faulty or dirty mass airflow sensor Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. Weak fuel pump Clogged or dirty fuel injectors Clogged fuel filter Exhaust leak Faulty oxygen sensor Faulty air-fuel ratio sensor P0171 Symptoms Check Engine Light is on or flashing Lack of power from the engine Rough idle Feb 21, 2022 · P0171 Causes Faulty or dirty mass airflow sensor Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. Weak fuel pump Clogged or dirty fuel injectors Clogged fuel filter Exhaust leak Faulty oxygen sensor Faulty air-fuel ratio sensor P0171 Symptoms Check Engine Light is on or flashing Lack of power from the engine Rough idle ...that then is coming back again they PUT THE Scanner an told me about this two codes the po 171 says: THE The other one says: CODE PO 401: THE PCM HAS DETERMINED THAT THERE IS A...The P0171 OBD-II code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine Some - Answered by a verified Chevy Mechanic 2012 Chevy Cruze vin 1G1PG5SC8C7306754 OBD codes p0171 p0106 p1101 Fuel pressure 45psi idling … I posted this in the S4 section, but didnt get much help. Hoping someone here has some ideas. Here's the background: Car started by having a blinking CEL at a...150V, 171A, 5.9 mOhm, 151 nC Qg, TO-247AC. 200 В. IRFP4227PBF. coffee maker k cups When the code P0171 is read, it means that the Oxygen sensor on bank one has recognized a lean mixture beyond its capacity to correct. Usually, the Oxygen O2 sensors should and do correct a fuel mixture of +-15%. However, if the air-fuel mixture is beyond these confines, the P0171 code will be stored. I have hey po171 code it runs good it it doesn't leak oil it's just got this cold on it I pulled the mass airflow sensor out and cleaned it good and put it back but it popped back on. My car has 134000 miles.PO171 means the engine is running lean(that means that the engine is getting too much oxygen rather than fuel)! Although replacing the 02 sensor has a chance of solving it, unfortunately it doesn't always...Mine just threw the codes for lean bank 1 and 2, mechanic said it might be the CAI with it all of a sudden getting colder out, the colder denser air may effect it.ISO 639 is a standardized nomenclature used to classify languages. Each language is assigned a two-letter (639-1) and three-letter (639-2 and 639-3) lowercase abbreviation, amended in later versions of the nomenclature. labcorp appointment I checked the fault codes and PO 171 is the only code recorded. Checking on the web, that code corresponds to certain symptoms including a rough idle. Possible causes suggested areMy 1996 xj with 216k miles is coming up with a PO171 code. I've replaced cap, rotor, wires, plugs, O2 sensor, and just recently injectors, to no avail. under armour t shirtsI posted this in the S4 section, but didnt get much help. Hoping someone here has some ideas. Here's the background: Car started by having a blinking CEL at a...I took it to Autozone and they read the codes P0171 (system bank1) and PO174 (System bank2). They said it looked like those codes hit twice and suggested buying some fuel injector cleaner could fix it?150V, 171A, 5.9 mOhm, 151 nC Qg, TO-247AC. 200 В. IRFP4227PBF.I have been getting the PO0171 code for weeks now and today I got the PO101. It was really running crappy also. I had earlier found a vacuum line broke and...Aug 20, 2008 · po171 is bank 1 system lean, if your clamp was loose could have been having a vacuum leak after maf sensor and thinking it was running lean. clear the code and let idle for 10minutes. if light does not come back on then it is good to go. Rey 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. Aug 21, 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. Before taking it to Autozone to have the code tested I put approximately 10 gallons of gas in it. Autozone check the engine and it threw the code PO171-Bank 1 system too lean.Feb 21, 2022 · P0171 Causes Faulty or dirty mass airflow sensor Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. Weak fuel pump Clogged or dirty fuel injectors Clogged fuel filter Exhaust leak Faulty oxygen sensor Faulty air-fuel ratio sensor P0171 Symptoms Check Engine Light is on or flashing Lack of power from the engine Rough idle Hello guys! I'm thinking of removing all the image from my program, and based on the code below (which creates an image with its hexadecimal code), recognize the image by the code itself and use...PhoenixBIOS 4.0 E8 Set Huge Segment EA Initialize OEM special codeMy Toyota Vitz (Yaris) 2007 randomly gives PO171 (System Too Lean) when at idle. My mechanic has done following fixes so far, but problem still persists.Hello guys! I'm thinking of removing all the image from my program, and based on the code below (which creates an image with its hexadecimal code), recognize the image by the code itself and use... ryobi presure washer 5. I cleaned the MAF sensor and reset the codes, but the light came back on within a couple miles with the same code. I might clean it a second time. 6. My air filter sensor is in the green.Reverses The Conversion var Code_Point = function(High_Surrogate, Low_Surrogate){ return (High_Surrogate - 0xD800) * 0x400 + Low_Surrogate - 0xDC00 U+A4F9 Лису буква tone na po.My CEL went on two weeks ago. Diagnostic code PO171 "lean condition". The mechanic did a smoke test as he originally suspected a vacuum leak. No vacuum leak but he did find a leaky airbox.PO171 means the engine is running lean(that means that the engine is getting too much oxygen rather than fuel)! Although replacing the 02 sensor has a chance of solving it, unfortunately it doesn't always...IM GETTing codes po171 bank1 too lean po174bank2 too lean can someone tell me what the fix is thx 2009 xf s/c.Your check engine light is on, and you got the code P0171 or P0174, "system too lean." This video shows you How to Fix Engine Code P0171 in the easiest, quickest, and cheapest way.Feb 11, 2021 · The P0171 code indicates that the fuel system in part of the engine is running weak or there is a vacuum leak near that side of the engine. This happens when the engine is getting too little gas or too much air. Now let’s go over a bit of Chevy Cruze history. Then we will go into more detail about the P0171 code. Manufacturer: NAND Product Model: USB2DISK Product Revision: 0.00. Controller Vendor: FirstChip Controller Part-Number: FC1179 Flash ID code: 2CB47832AA04 - Micron - 1CE/Single Channel [TLC].The code was PO 171. I have been doing some checking on the internet and it seems to point to either a faulty O2 sensor, MAF sensor, or a vacuum leak. malta property for sale I have been getting the PO0171 code for weeks now and today I got the PO101. It was really running crappy also. I had earlier found a vacuum line broke and...Code. PO. Portsmouth.Our 99 Accord V6 with 168K miles has recently started acting up. CEL lights up for a day or two, then turns off. Every time the code has been pulled/reset, it is showing a PO171 (fuel mixture too lean).So my check engine light came on and this is the code that my Cobb access port gave me po171. po171 in my Cobb accses port manual means too lean.Our 99 Accord V6 with 168K miles has recently started acting up. CEL lights up for a day or two, then turns off. Every time the code has been pulled/reset, it is showing a PO171 (fuel mixture too lean).This video shows you How to Fix Engine Code P0171 in the easiest, quickest, and cheapest way. PO171 PO174 The codes from HELL!!! Finally fixed. Maybe this will help you!Jan 26, 2018 · P0171 Fuel trim lean bank 1, The best possible fix tune up,replace sparkplug, remove one at least and look at the gap and condition when a sparkplug wears out it leans out the system also if oil enter the sparkplug boot area it also leans out the system. if this is not cause a by a vacuum leak or false air or even a partial plugged fuel filter you bet a sparkplug change will fix this, This can also be caused by a MAF (Mass air flow ) being dirty, today if you purchase a air filter it has ... 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. homes for sale raleigh nc My Toyota Vitz (Yaris) 2007 randomly gives PO171 (System Too Lean) when at idle. My mechanic has done following fixes so far, but problem still persists.Reverses The Conversion var Code_Point = function(High_Surrogate, Low_Surrogate){ return (High_Surrogate - 0xD800) * 0x400 + Low_Surrogate - 0xDC00 U+A4F9 Лису буква tone na po.Installer emailed the download back to Procharger. 20 miles after new program loaded the light kicks back on again but with PO171 lean code.IM GETTing codes po171 bank1 too lean po174bank2 too lean can someone tell me what the fix is thx 2009 xf s/c.injectors and fuel filter and still got the po171 code, i cleared it but its still comes back instantly, i put the bosch maf back on the 850 and put the copy one back on the v70 and i got 2 fault codes, bad maf an...I have a stored code from my Windstar and I am curious what it is and how to correct it. The error code states: The fuel system for Bank one was too lean - 171. Any suggestions?Aug 02, 2017 · How to repair p0174 bmw code Mixture Control 2 System Too Lean Bank 2. With the Air/Fuel Mixture Ratio Self-Learning Control, ... P0174 BMW code tech notes. If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. What does po171 code mean on 1999 Ford contour 4-cylinder? Code P0171 means System to lean (bank 1). What does a check engine code PO136 mean for a 1997 Toyota Corolla?IM GETTing codes po171 bank1 too lean po174bank2 too lean can someone tell me what the fix is thx 2009 xf s/c. homedepot sheds The Easiest Cheapest Fastest Way To Do A Vacuum Leak Test 4 Broke Folkz Code S Po171 Or Po174.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. How do you fix code P0171? Aug 21, 2022 · | Code P0171 Oldsmobile Description The Engine Control Module ( ECM) controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy, and emission control. Fuel delivery is controlled differently during Open Loop and Closed Loop. No, the PO171 fault code actually means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. blues room Last week I changed out my air filter while doing an oil change, and the check engine light came on. I've had a code scanner for several years so I checked it out. P0171 is the code.Hi, i just purchased a vw beetle 2003 and the engine line is on with a code of PO171? What and where can i check this out, and is it an individual can probably chek and repair?Aug 21, 2022 · | Code P0171 Oldsmobile Description The Engine Control Module ( ECM) controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy, and emission control. Fuel delivery is controlled differently during Open Loop and Closed Loop. translate from english to italian Start studying PO171 Midterm 1. Learn vocabulary, terms and more with flashcards, games and other study tools.May 26, 2011 · Answer. P0171 is fuel system supply too lean. You could have a vacuum leak, low fuel pressure, bad MAP sensor, bad O2 sensor...... looking at live sensor data on a professional grade scan tool or even looking at "freeze frame" information on your scan tool if it is available may indicate where the problem is. Sep 04, 2017 · P0171 Fuel trim lean Bank 1. Lean code condition are when there is more air than fuel. or lack of fuel pressure / volume. There is not much vacuum hose leaks that can cause the lean code, but you do have a PCV that is attached to a rubber hose, a cut there would allow unaccounted air, Then there is the intake gaskets that can develops leaks Then there is the fuel system a fault fuel strainer allowing debris into the fuel pump lower its capability to provide adequate fuel pressure. 2011 Chevy Cruze LT Mileage:69,000 Had check engine light come on after experiencing little smoke coming from engine now and then. So I plugged in the OB2 reader and cam out with code PO171.The shudder got bad enough where the truck finally threw PO171. Here's a quick summary of what I've tried to fix the shudder: 1. PO171 code - Check for vacuum leaks, didn't find any.P0171 (Fuel System Lean (Bank 1)) Discussion of this trouble code among automotive professionals on iATN for February changed the maf sensor got rid of the po 171 code but this thing runs great ...Your check engine light is on, and you got the code P0171 or P0174, "system too lean." This video shows you How to Fix Engine Code P0171 in the easiest, quickest, and cheapest way.2011 Chevy Cruze LT Mileage:69,000 Had check engine light come on after experiencing little smoke coming from engine now and then. So I plugged in the OB2 reader and cam out with code PO171.IM GETTing codes po171 bank1 too lean po174bank2 too lean can someone tell me what the fix is thx 2009 xf s/c.Start studying PO171 Midterm 1. Learn vocabulary, terms and more with flashcards, games and other study tools....(BATT) Volts (Batt) 169 Температура Внутри Кузова CARGOAMBTEMP CARGO TEMP 170 Температура Внутри Кабины CAB INT TEMP CAB TEMP 171 Температура Наружного Воздуха...Can anyone help with this code? 'System Too Lean Bank 1' - apparently can be a leaky pipe or diaphragm but on a quick look my mechanic could see no PO171 Error code. Jump to Latest Follow.Just letting everyone know for the future...my check engine light was on throwing the PO171 code and a day later my car started to idle bad. The RPMs would drop really low and come back up and would...Any assistance possible my jeep through these codes after submerging in water engine will run but very rough but once put under a load has no power Code po171 and po174. Jump to Latest Follow.Oftentimes, a P0171 means that your Toyota is having trouble with a dirty or faulty mass airflow (MAF) sensor, or a vacuum leak downstream of the MAF sensor (perhaps in the PCV line or in the valve itself). Of course, this code can also signify a bad O2 sensor in bank 1. No, the PO171 fault code actually means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine.May 25, 2022 · “Code P0171 – system too lean bank 1” means there is too much oxygen or too little fuel in the exhaust, which is referred to as a “lean” condition, or a lean or “low fuel trim” code. This can be caused by something like a disconnected hose or vacuum leak, which means there’s more air than usual, or because your fuel system is weak. 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. I've had a PO171 System Too Lean since July and I have done everything to diagnose the issue. I've used a smoke machine to check for vacuum leaks, found nothing. I replaced the upstream oxygen sensor, solved nothing. I replaced the mass air flow sensor, solved nothing. I've even replaced the rubber seals around my fuel injectors as I could hear ... Feb 26, 2022 · P0171 Causes Faulty or dirty mass airflow sensor Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. Weak fuel pump Clogged or dirty fuel injectors Clogged fuel filter Exhaust leak Faulty oxygen sensor Faulty air-fuel ratio sensor P0171 Symptoms Check Engine Light is on or flashing Lack of power from the engine Rough idle Has anyone else got a trouble code po171 after a cold air intake The shudder got bad enough where the truck finally threw PO171. Here's a quick summary of what I've tried to fix the shudder: 1. PO171 code - Check for vacuum leaks, didn't find any.I have a 08 trailblazer and it just started to throw a PO171 system too lean bank 1 code. On my truck, I have done all that I have included and I still have an intermittent P0171 Trouble Code. nike shoes for men on sale ...(BATT) Volts (Batt) 169 Температура Внутри Кузова CARGOAMBTEMP CARGO TEMP 170 Температура Внутри Кабины CAB INT TEMP CAB TEMP 171 Температура Наружного Воздуха...po171 code help please. Jump to Latest Follow. austrian grand prix Canada Zip Code A Canadian postal code is a six-character sequence that forms a portion of a postal address in Canada. Like British, Irish, and Dutch postcodes, Canada's postal codes are alphanumeric.The shudder got bad enough where the truck finally threw PO171. Here's a quick summary of what I've tried to fix the shudder: 1. PO171 code - Check for vacuum leaks, didn't find any.I've had a PO171 System Too Lean since July and I have done everything to diagnose the issue. I've used a smoke machine to check for vacuum leaks, found nothing. I replaced the upstream oxygen sensor, solved nothing. I replaced the mass air flow sensor, solved nothing. I've even replaced the rubber seals around my fuel injectors as I could hear ... 2007 Civic PO171 code. I have a 2007 civic with 142k on the clock . The block was replaced under warranty less than 10k. Yesterday I had a check engine light come on .I used torque pro to get the...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. How do you fix code P0171? May 25, 2022 · “Code P0171 – system too lean bank 1” means there is too much oxygen or too little fuel in the exhaust, which is referred to as a “lean” condition, or a lean or “low fuel trim” code. This can be caused by something like a disconnected hose or vacuum leak, which means there’s more air than usual, or because your fuel system is weak. Jul 07, 2020 · When they appear together, it indicates that the entire engine is running lean. Definition Both of these codes are generic, which means they have the same meaning (Ranger or not). P0171 – Fuel Trim System Lean → Bank 1: P0171 indicates that the side of the engine with the first cylinder (Bank 1) is running lean. Feb 11, 2021 · The P0171 code indicates that the fuel system in part of the engine is running weak or there is a vacuum leak near that side of the engine. This happens when the engine is getting too little gas or too much air. Now let’s go over a bit of Chevy Cruze history. Then we will go into more detail about the P0171 code. Jan 27, 2021 · 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. garage logic podcast I posted this in the S4 section, but didnt get much help. Hoping someone here has some ideas. Here's the background: Car started by having a blinking CEL at a...I took it to Autozone and they read the codes P0171 (system bank1) and PO174 (System bank2). They said it looked like those codes hit twice and suggested buying some fuel injector cleaner could fix it?The code was PO 171. I have been doing some checking on the internet and it seems to point to either a faulty O2 sensor, MAF sensor, or a vacuum leak.IM GETTing codes po171 bank1 too lean po174bank2 too lean can someone tell me what the fix is thx 2009 xf s/c.Unfortunately all manufactures do not come with them; reading people going crazy trying to figure out was wrong after installing intake and Eng. light comes on with po-171 code thinking that they have...Has anyone else got a trouble code po171 after a cold air intake lanyard card holder Feb 26, 2022 · P0171 Causes Faulty or dirty mass airflow sensor Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. Weak fuel pump Clogged or dirty fuel injectors Clogged fuel filter Exhaust leak Faulty oxygen sensor Faulty air-fuel ratio sensor P0171 Symptoms Check Engine Light is on or flashing Lack of power from the engine Rough idle It is okay to drive a vehicle with P0171 for a short period of time, but driving with this code for an extended period of time can overheat the engine and cause internal engine damage.Packages. Security. Code review. Issues. Discussions.A P0171 code often indicates that your Toyota is experiencing issues with a dirty or defective mass airflow (MAF) sensor, or that there is a vacuum leak downstream of the MAF sensor (perhaps in the PCV line or in the valve itself). Of fact, this signal might also indicate a malfunctioning oxygen sensor in bank 1. quorn recipes Po171. Mechanic's Assistant: What is the make/model/year of your car? 2000 Toyota corrola. got a code po171 code lean bank one did a carb test on intake etc for leaks found none … read more.Error code: 2.After doing a little research, I found that the main two issues with a PO171 code is either a vacuum leak or a faulty MAF sensor. The MAF sensor seems to be doing its job so, Ive moved on to a vacuum leak.Mine just threw the codes for lean bank 1 and 2, mechanic said it might be the CAI with it all of a sudden getting colder out, the colder denser air may effect it. canva posters I have a 08 trailblazer and it just started to throw a PO171 system too lean bank 1 code. On my truck, I have done all that I have included and I still have an intermittent P0171 Trouble Code.Feb 13, 2022 · The P0171 error code is telling you that a lean condition exists, which means the ratio of air to fuel is off, and there's too much air in the system. In this article, we're going to break down what the symptoms, causes, and possible solutions are for this error code so that you can get your Volkswagen properly functioning again. Symptoms They pull the codes again, and this time I get a PO0171, and a PO301 Cylinder 1. Is the fact that I have both the 171 code (running lean Bank 1) and 420 code (low-efficiency catalytic converter) would...As everyone probably knows this code means "lean on bank 1" this caused me to fail the AZ emission test so I looked around on here and found a lot of I read the code and once again it was PO171.PO171 means the engine is running lean(that means that the engine is getting too much oxygen rather than fuel)! Although replacing the 02 sensor has a chance of solving it, unfortunately it doesn't always...Hello guys! I'm thinking of removing all the image from my program, and based on the code below (which creates an image with its hexadecimal code), recognize the image by the code itself and use... hilti tools I took it to Autozone and they read the codes P0171 (system bank1) and PO174 (System bank2). They said it looked like those codes hit twice and suggested buying some fuel injector cleaner could fix it?Feb 21, 2022 · P0171 Causes Faulty or dirty mass airflow sensor Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket. Weak fuel pump Clogged or dirty fuel injectors Clogged fuel filter Exhaust leak Faulty oxygen sensor Faulty air-fuel ratio sensor P0171 Symptoms Check Engine Light is on or flashing Lack of power from the engine Rough idle What does po171 code mean on 1999 Ford contour 4-cylinder? Code P0171 means System to lean (bank 1). What does a check engine code PO136 mean for a 1997 Toyota Corolla?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. 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. Code. PO. Portsmouth. london ontario postal code