Po174 code bmw

A smoke test should make it show though. Next guess would be a cracked or broken oil return line coming off the CCV valve that goes to the dipstick. My first experience with the P0171 / P0174 codes was the broken oil return line. Second time it was the intake boot. '05 X3 3.0i Alpine White/Gray Leather/Alum.

The P0174 code is thrown when the bank two sensor one O2 sensor reports that your Maxima's engine is running lean. Swap Test. If your Maxima has P0174 without P0171 present, you can swap the bank one and two O2 sensors and see if the code "jumps" to the other bank. Here's what you do. Clear the diagnostic trouble codes with your scanner.The P0174 code in a BMW indicates that the engine's control module has detected a lean condition on bank 2 of the engine. This means that there is an imbalance in the air-fuel mixture, resulting in too much air or too little fuel being supplied to the engine. Such an imbalance can lead to reduced engine performance, increased emissions, and ...The BMW P0444 code is a diagnostic trouble code (DTC) that indicates a problem with the evaporative emission control system purge control valve circuit. This code is triggered when the engine control module (ECM) detects an open circuit in the purge control valve circuit, which is responsible for controlling the flow of fuel vapors from the ...My 2002 E46 with 90K has been throwing mostly PO171 and PO174 lean codes for the past couple of months about every 30 miles.Also throws P1083 and P1085 at times along with the others. ... P1nnn codes are called Manufacturer Specific, or unique, codes. BMW can make a P1188 code that means the fuel trim/control is malfunctioning. …

2003 bmw 330ci, check engine ligth on, code po174. also just started using a little oil. - Answered by a verified BMW Mechanic ... OBDII codes said P0171 and PO174 -Fuel System Too Lean banks 1 and 2 Peak R5FCX3 codes say the following: Mixture preparation banks 1 and 2 Idle Speed implausible - air lea ...Common Causes of BMW Code P0171. There are several common causes of code P0171 in BMW vehicles: Air intake leaks: Any vacuum leaks in the air intake system can result in an imbalance in the air-fuel mixture. Faulty oxygen sensors: A malfunctioning oxygen sensor can provide incorrect readings, leading to an imbalanced mixture. Dirty or clogged fuel injectors: If the fuel injectors are dirty or ...Step 7: Clear the Code and Test Drive. After addressing the potential causes, clear the P0174 code with your OBD-II scanner and take your BMW for a test drive to ensure the issue is resolved. Conclusion. Addressing the P0174 code in your BMW 5 Series requires a systematic approach to diagnose and fix the underlying issue.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...If the P0174 is combined with the P0171 code, it's 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. If the problem persists the Air Fuel Ratio (A/F) Sensor (Front Oxygen Sensor) may need to be replaced.CONCEPT: Fault Codes should NOT be viewed as identifying WHAT COMPONENT to Remove & Replace. The two FC you list: 2D06 & 2D0F, both have some relation to the SIGNAL from the MAF as received by the DME. Basically, that signal is "out-of-range," completely lacking, too high or low voltage, etc., or the signal does NOT …One of the most common trouble codes with the Chevy Traverse is P0174. It indicates that your Chevy Traverse is running lean on the bank two side of the engine. P0174 and P0171 (fuel trim lean bank one) are the most frequently seen air/fuel mixture-related codes. If they appear together, it reduces the list of=============================Claim your FREE engine code eraser 👉 https://free.nonda.co 👈==== How to Fix P0174 ============Engine Code P0174 Saving Repair ...

An auto parts place checked the ODB code of my '03 E46 and found P0174. I've read about a dozen Bimmerfest threads about this and I now have to ask this question. ... You can get a Peake reader which will read BMW-specific codes, which should pin-point things a little further. P0174 means you're running lean -- most likely a crack in your ...DISA Rebuild Kit from German Auto Solutions for 3.0L only: https://amzn.to/2OLJy5hDISA Rebuild Kit from German Auto Solutions for 2.2L and 2.5L: https://amzn...The pattern has repeated without fail for the past several days now. The codes read as P0174 and P1085. I am still reading up on previous posts on these codes. I've dealt with my fair share of lean codes before, including changing the all the rubber boots after MAF, cleaning MAF, CCV overhaul, etc.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 …May 2, 2016 · The pattern has repeated without fail for the past several days now. The codes read as P0174 and P1085. I am still reading up on previous posts on these codes. I've dealt with my fair share of lean codes before, including changing the all the rubber boots after MAF, cleaning MAF, CCV overhaul, etc.

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BMW Fault Code Lookup. Enter a BMW fault code (P or hex), complete the captcha, and click "Search" P-Codes will start with a P and are usually generated by generic scanners. Example: P1055 Hex Codes are typically given by more advanced scanners. Examples: 180101 or 1B9308 or 30FF.2. P0492: SECONDARY AIR SYSTEM BANK 2. 3. P0171: SYSTEM TO LEAN BANK 1. 4. P0174: SYSTEM TO LEAN BANK 2. Please break all these down for me and where they are located in the engine. Answered in 2 hours by: BMW Mechanic: autobahnauto.Tech Notes. The P0174 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0174 is set in along with the P0171 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 ...The meaning of fault code P0174. P0174 is triggered when the upstream oxygen sensor on cylinder bank 2 indicates that the conditions are too lean in one of the cylinders. This means that the cylinder has too much air or not enough fuel according to the optimal air-fuel ratio. When the sensor readings show there is too much oxygen, the ...Code PO174, on a 2004 BMW 325i. If the air/fuel ratio is too lean, what can be done? any ideas.. thanks a - BMW 2004 3 Series questionBmw x5 3.5d engine idleEngine bmw x5 xdrive 40e phev 2.0 Purchase used 2010 bmw x5 xdrive 4.8i in knoxville, tennessee, united statesBmw code p0171 x5 e70 p0174 fix f15 e53. 2012 x5 diesel reduced power with lots of codesEngine x5 moteur proxyparts f15 40e xdrive silnika overhaul onderdelenlijn n20 2010 bmw x5 3.0d m-sport xdrive ...

The iPhone of headlights. This year’s Consumer Electronics Show in Las Vegas was a feast for the senses: More than 170,000 people from all over the world, wandering endless aisles ...Started driving the E46 to get it ready for smog testing and BAM! Check Engine Light. Codes were P0172 (Too Rich Bank 1) and P0174 (Too Lean Bank 2) Checked the upper and lower intake boots, ICV and throttle body (replaced all the boots and gaskets back in 2013). Also replaced my PCV/CCV then too along with fuel filter, fuel pump, bunch of ...BMW’s M division has always been about taking the German luxury car manufacturer’s production vehicles a few steps further. And like its competitors, the company has long thought a...When it comes to luxury SUVs, few brands come close to the quality and style of BMW. But what’s the cost of a BMW SUV? In this article, we’ll explore the various factors that go in...BMW P0172 Code: Mixture Control System Too Rich Bank 1. The BMW P0172 code is a diagnostic trouble code (DTC) that indicates a problem with the fuel system in BMW vehicles. Specifically, it means that the mixture control system is too rich on bank 1, which can lead to a variety of issues with the engine's performance and efficiency.Dec 8, 2019 ... Comments7 · HOW TO FIX P0171 & P0174 Codes + COMMON E46 VACUUM LEAKS · BMW P0171 P0174 2883 2882 Bank 1/2 Lean Code diagnostics and vacuum leak&nb...For those wanting to see more of BMW's 4th generation 3 series, the beautiful and timeless E46 ... In my case I only had the two lean codes and a P0313 misfire when low on fuel but I was able to fix the P0313 by running 3 bottles of Techron complete fuel system cleaner within the span of 3 weeks when I fill up. Reply reply More repliesI had the P0171/0174 randomly occurring as well. Advice I received indicated replacing the Intake Boots was in order as this is a common source for a vacuum leak. I replaced the first one off the MAF and the result was just one of the two codes occurring, again, randomly. Replaced the DISA O-Ring, no change.OBD Codes Help, P0171, P0174, P1083 and P1085. So I've been dealing with an EML for the last few weeks turning on and off. It reads the codes above yesterday when I finally received the scanner I ordered myself.

PO171 and PO174 codes - engine light turned on and then turned off - now it's back on ... 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 with Bayerische Motoren Werke AG. …

P0171, P0174 resolved. Hi Everyone, About 4 weeks ago, my service engine soon light came on (2003 X5 3.0i). I had the codes read and found P0171, P0174 indicating both banks were lean. Anyone who has had to do the search for these codes knows there are many reasons and lots of things to try. In my case it was a failed DISA valve which was ...1 2 3. BMW_tech. 2048 posts · Joined 2007. #2 · Feb 1, 2008. Sib 12 20 07. M54/M56: Mixture Too Lean - Fault Codes 2882/2883 are Stored in the DME. E46 with M54 from …Oct 22, 2017 ... Chasing a check engine light and found vacuum hoses collapsed and possibly leaking or sucking in air..its not easy to get to or see..but you ...i have an 03 x5 with 3.0 motorthat has a po174 code which says bank 2 o2 sensor is running lean.does that mean one or two injectors are dirty or the rear o2 sensor is getting lazy.this happened after ichanged the oil with castrol edge synthetic,flushed coolant and used oe antifreeze ... What would cause all 4 Lamba signal codes? 2003 BMW 540 ...Two months ago I had the car serviced for P0174 and P0171 codes, which they traced to the air filter that had been eaten away by a mouse. They replaced the air filter, and cleared the code. ... Xoutpost.com is a private enthusiast site not associated with BMW AG. The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 ...I am getting codes po174, po102, po171, and po128 So I changed the MAF Bank 1 o2 DISA due to a loose butterfly just in - Answered by a verified BMW Mechanic. ... I have a 2003 BMW X5 3.0 with 143K miles. Fault codes indicate multiple misfires with fuel cut-off; always in bank 2 (cylinders 4, 5, or 6). ...R. Racer1691 Discussion starter. 33 posts · Joined 2020. #1 · Oct 4, 2020. I have pulled 3 different codes, P00BC, P0174, AND P0171. I have replaced both the DISC Valves, Cleaned both the Vanos Solenoid's. Cleaned the Mass Air flow sensor. I am at a loss of what else to do. I really don't want to throw parts at it.2004 Bmw 325ci e46 p0171/p0174 and limp mode. I have constant p0171/p0174 on my car and if I'm going 35 and put pedal to the floor it goes in limp mode. Turn off and restart and it's fine again. I have tore apart the intake system 20x and found nothing. Looks like someone chased this problem before and replaced every boot hose tb and disa.

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The BMW had fault codes 227 and 228 stored (P0171, P0174) indicating a lean fuel system. This means the vehicle is running lean and the DME has tried to correct the condition but has reached it upper limit. Fault codes 227 and 228 are specific to a fault when the engine is at part throttle (not idle). This tells us that it's unlikely the lean ...May 24, 2021 · 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. Apr 11, 2020 ... How to diagnose BMW E46 E39 E53 Vacuum leaks Lean codes P0171 P0174 for the M54 M52tu ... code-29cd,29d1,29cc. Eddie Mexico auto repair•1.7K views.What Does Code P0171 Mean? 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 process when diagnosing P0171.Feb 1, 2008 · The fault codes "2882/2883 - fuel trim, mixture too lean" are stored in the DME. CAUSE. Possible causes may include: incorrect air filter, unmetered air or a defective air mass meter. PROCEDURE. Remove and inspect the air filter element. Only the filter with the P/N 13 72 1 744 869 must be fitted. Tailgate mod, horn mod,storage door mod. The P0 codes that have been listed, P0171 left bank lean (driver's side) and P0174 right bank lean (passenger's side) both have a common item to check. The front O2 sensor that should be on each exhaust side of the V6, before the catalytic converter.P0174 Code + Check Engine Light = 32 mpg!? I was driving my car from Houston to New Mexico today. About 500 miles into my trip the check engine light came on. Once I got to NM I went to autozone and they checked and returned a P0174 OBD-II code. I was just about out of gas, I had filled a couple times on the way over and avgd about 30 mpg but I ...What does code PO174 mean 2004 BMW 325ci - BMW Cars & Trucks. Posted by Carl Archer on Aug 30, 2015. Want Answer 1. Clicking this will make more experts see the question and we will remind you when it gets answered. Comment; Flag; More. Print this page; Share this page; Add Your Answer ...Aug 19, 2009 · nathancarter. 1404 posts · Joined 2007. #8 · Dec 3, 2009. @BMWMatt and @tony330cifan: I believe P0313 is a misfire on Cyl #4. If it's accompanied by P0171 and P0174, then it's a misfire due to the lean condition. If this is your only problem, you might not have noticeably rough idle or power loss. BMW P0171 DTC Meaning. P0171 – System Too Lean (Bank 1) Code P0171 indicates the engines computer (commonly known as the DME) thinks the engine is running too lean on bank 1. On inline-6 BMW engines, bank 1 refers to cylinders 1-3. Lean refers to the air-fuel ratio (AFR) and means there is too much air and too little fuel in the system.2. P0492: SECONDARY AIR SYSTEM BANK 2. 3. P0171: SYSTEM TO LEAN BANK 1. 4. P0174: SYSTEM TO LEAN BANK 2. Please break all these down for me and where they are located in the engine. Answered in 2 hours by: BMW Mechanic: autobahnauto. ….

Code P0171 applies to Bank 1 and P0174 applies to Bank 2. Code P0174 mainly applies to V6 or V8 engines because 4-cylinder engines generally have only one bank, though there are a few exceptions. Some of the high performance 4-cylinder and straight 6-cylinder engines (such as those in BMW and Lexus) split the cylinders into …As with many cars, the EML on a BMW is the engine management light. When the engine management light shows on a dashboard, it means the computers aboard the car have detected a pro...BMW takes pride in positioning itself as an elite luxury vehicle, except in the realm of electrics. The company has entered the electric car market with its i3 four-seater city car...END OF SPECIAL NOTES. OBD II fault trouble code P0171 is a generic code that is defined as P0171 - "System Too Lean - Bank 1" and is set when the PCM (Powertrain Control Module) detects an overly lean air/fuel mixture on Bank 1, which is the bank of cylinders on V-type engines that contains cylinder #1. Note that on BMW vehicles, the ...This code is one that surfaces with certain makes of automobiles more than others. In writing this article I've added Mercedes-Benz-specific info since it seems that M-B (and VW) are most prone to having this P0173 surface along with misfire codes or other fuel trim codes. P0173 means there was a malfunction in the computer's control of the air ...The codes that came up were p0171 and p0174. I have been reading on forums and believed it is the MAF, but then i read that the code for it is p0170. So I'm a little confused, can anyone help. :dunno: PLEASE, THANKS ... '02 BMW 530i '99 BMW Z3. Save Share. Like. T. TheOleBoy Discussion starterA. armstrst Discussion starter. 10 posts · Joined 2017. #1 · Apr 20, 2017. I have been struggling diagnosing a P0172 code that keeps coming up. I have a diagnostic tool to look at a number of parameters. When I look at fuel trim data I notice the following: When the car is accelerating the long term fuel trim on bank 1 stays around -10% and ... Basically this P0174 code means that the upstream oxygen sensor in bank 2 reporting a lean condition (too much oxygen in the exhaust). On V6/V8/V10/V12 engines, Bank 2 is the side of the engine that doesn't have cylinder #1. The engine uses what are called O2 or oxygen sensors in the exhaust stream to determine the air to fuel ratio of the ... Po174 code bmw, Definition: System Too Lean Bank 2. The P0174 engine code indicates that your car’s air-fuel ratio is too lean. The gas in your car has to be mixed with oxygen before it can combust and power your vehicle. When the air and gas are present in the right ratio (known as the stoichiometric ratio or “stoich”), the mixture burns completely., Har du problem med OBDII-kod P0174 på din BMW? Läs om möjliga orsaker, symptom och lösningar på AutoCodes.com, den bästa länken för bilreparation., 525 I: 2002 BMW 525 CODE PO174. Customer Question. 2002 BMW 525 CODE PO174... 2002 BMW 525 CODE PO174. Submitted: 9 years ago. Category: BMW. Ask Your Own BMW Question. Share this conversation. Answered in 42 minutes by: 5/29/2014., 2004 Bmw 325ci e46 p0171/p0174 and limp mode. I have constant p0171/p0174 on my car and if I’m going 35 and put pedal to the floor it goes in limp mode. Turn off and restart and it’s fine again. I have tore apart the intake system 20x and found nothing. Looks like someone chased this problem before and replaced every boot hose …, If the P0174 is combined with the P0171 code, it's 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. If the problem persists the Air Fuel Ratio (A/F) Sensor (Front Oxygen Sensor) may need to be replaced., Hey guys, so I've got an E39 530iA with almost 100k miles and all of a sudden the SES light comes on. I pull my cheapo OBD scanner and see P0171 & P0174 come up. I erase it and go home. By the time I back it in the SES light comes on. I hook the car up to PA BMW SOFT and erase the codes. 500 miles later the SES light pops up with the same code., The BMW P0170 code is a fault code that indicates a problem with the fuel trim in bank 1 of the engine. This means that the engine is running too lean, which can cause a variety of issues such as poor fuel economy, rough idling, and reduced power. The fuel trim is the amount of fuel that is added or subtracted from the engine's air/fuel ..., BMW P0304 Code : Misfire Cylinder 4. As a BMW owner, it can be frustrating to see a check engine light pop up on your dashboard. One of the most common diagnostic trouble codes (DTC) that BMW drivers may encounter is the P0304 code, which indicates a misfire in the fourth cylinder of the engine. This issue can cause a range of symptoms, from a ..., However, after turning on the engine, a scan of current codes only revealed the P0174 - System Too Lean (Bank 2), with the module Fuel and Air Metering. I went ahead and cleared the SES light. It did not return immediately or anything after clearing it, but of course the vehicle was idling., Definition: System Too Lean Bank 2. The P0174 engine code indicates that your car’s air-fuel ratio is too lean. The gas in your car has to be mixed with oxygen before it can combust and power your vehicle. When the air and gas are present in the right ratio (known as the stoichiometric ratio or “stoich”), the mixture burns completely., 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,..., Make: BMW. Code: P0174. Definition: Fuel System Too Lean (Cylinder Bank 2) Description: Key on or engine running, all electrical components off and coolant temperature at least 80 degrees Celsius; and the DME detected the Bank 2 Fuel Control System reached its lean correction limit. The fuel status is in a closed loop pattern, the coolant te., 26K subscribers in the e46 community. For those wanting to see more of BMW's 4th generation 3 series, the beautiful and timeless E46, BMW CODE P0700 TRANSMISSION CONTROL SYSTEM FIXIf you have a BMW that has code P0700 and transmission malfuction light or warning on you BMW we will explain w..., Code Tech Notes. If the P0174 is combined with the P0171 code, the problem is likely caused by an intake leak or the Intake Plenum Gasket and seals. If there are no intake leaks, the next step is to replace the air filter and clean the airflow meter. If the problem persists, the front oxygen (O2) sensor may need to be replaced., BMW Fault Code Lookup. Enter a BMW fault code (P or hex), complete the captcha, and click "Search" P-Codes will start with a P and are usually generated by generic scanners. Example: P1055 Hex Codes are typically given by more advanced scanners. Examples: 180101 or 1B9308 or 30FF., 2005 codes po174/po171 - Answered by a verified BMW Mechanic. We use cookies to give you the best possible experience on our website. ... 2001, 325i 2.5l auto, 228.229.227.226 bmw codes, po171,po174, set two time, bank one and b2. mass air reading 14hg/sec, somked the intake, ..., What Does Code P0171 Mean? 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 process when diagnosing P0171., Jan 6, 2015 · D. danny310 Discussion starter. 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. , How to fix a Ford P0174 engine code: Fuel Injection System Too Lean Bank 2A lean condition exists if the engine is getting more air than fuel in the cylinder..., For those wanting to see more of BMW's 4th generation 3 series, the beautiful and timeless E46 ... In my case I only had the two lean codes and a P0313 misfire when low on fuel but I was able to fix the P0313 by running 3 bottles of Techron complete fuel system cleaner within the span of 3 weeks when I fill up. Reply reply More replies, P0174 indicates a lean fuel condition on Bank 2. Our expert mobile mechanics can diagnose and fix your P0174 trouble code wherever you are., Dec 8, 2019 ... Comments7 · HOW TO FIX P0171 & P0174 Codes + COMMON E46 VACUUM LEAKS · BMW P0171 P0174 2883 2882 Bank 1/2 Lean Code diagnostics and vacuum leak&nb..., Check engine light is on, PO171 and PO174 codes, fuel trim. check engine light is on, PO171 and PO174 codes, fuel trim long at 11.7% and short term at 15% =- 3-4% this triggers code, may have manifold leek unable to find, ... Have 2006 BMW X5 with 120k with code P1093 (Pre-catalyst fuel trim too rich bank 2) Code pops 3 drive cycles after reset, Definition: System Too Lean Bank 2. The P0174 engine code indicates that your car’s air-fuel ratio is too lean. The gas in your car has to be mixed with oxygen before it can combust and power your vehicle. When the air and gas are present in the right ratio (known as the stoichiometric ratio or “stoich”), the mixture burns completely., BMW X5 CODE P0171, CODE P0174 FIX EXPLAINED, BMW E70 E53 F15If you have BMW X5 and you have code P0171 or code P0174 we will explain the top reasons that we ..., I need some help. It’s a 2002 BMW 325Ci with 143,000 miles. It has started running bad and throwing codes. The P0174 and P0171 codes are the only ones left that I can’t fix. The P0174 codes is always primary. I have 2 scanner tools, the Innova 3100 w/ABS and the Creator tool specific to BMW. I have followed the forum trying to correct the ..., 2002 bmw 5.30 i getting codes p1083, p1085, p0171, po174 system lean relavent to all codes! what do i check? Submitted: 13 years ago. Category: BMW. Show More. Show Less. ... 2002 e39 bmw 530i, codes are p0171, p0174, p1083 and p1085. i have changed all air intake hoses. new maf, ..., , 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 when the engine receives ..., The P0174 code means that the O2 sensor on bank 2 has recognized a too lean mixture, and the imbalance is too great for the O2 sensor to correct the issue on its own. The O2 sensor can correct a fuel mixture of +-15%. If the needed correction is out of this range, the P0174 code will be stored., BMW Fault Code Lookup. Enter a BMW fault code (P or hex), complete the captcha, and click "Search" P-Codes will start with a P and are usually generated by generic scanners. Example: P1055 Hex Codes are typically given by more advanced scanners. Examples: 180101 or 1B9308 or 30FF., BMW X5 CODE P0171, CODE P0174 FIX EXPLAINED, BMW E70 E53 F15. P0171,P0174,P0300 BMW 325ci. BMW P0171 P0174 2883 2882 Bank 1/2 Lean Code diagnostics and vacuum leak fix. P0174 "System Too Lean (Bank 2)" on a 2002 525i at high altitude (3,500 to 4,500') BimmerFest BMW Forum.