That's where the mechanic repair shop can come in handy. 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 average cost to replace a fuel injector is around $675, where the cost of parts is about $475 and the cost of labor is about $200. Another factor is the labor cost. The P0171 trouble code stands for "System Too Lean (Bank . I am here to help you with your car questions. These average estimates represent different part replacements, such as PCM replacement, fuel injector replacement, fuel pump replacement, and several others. Motor Vehicle Service Notification Letter: Scam Or Legit? On average, this repair costs $870, where parts cost around $690 and labor costs around $180. Here, the best way to prevent filter issues is to regularly change your filter. P0300 Code: What Causes It and Ways to Fix It! But if you decide to perform DIY work on your car, you can save money on the labor and also learn some things about cars. With a newer vehicle, you can normally see the issue immediately. For instance, having too much fuel is not a good thing, and your vehicle will throw an error displayed in the form of a check engine light illuminating. However, for DIYers, it's great to have a handy repair resource like ALLDATA. Start with the easiest things first. Of course, this signal could also indicate a faulty O2 sensor in bank 1. The PCV valve allows your engine to vent gases as they build up in the crankcase, maintaining proper air pressure. This guide is made for professionals with access to these tools. The EGR sensor and valve regulate the flow of exhaust from the combustion chamber back into the fuel injection system. You can save around $90 in general by replacing this part yourself. We are going to cover them later in this article. Then, try one of two common DIYs to fix the P0171 code: cleaning the MAF sensor or replacing the oxygen sensor. We understood that you can experience symptoms like misfires, rough engine work, low engine power, increased fuel consumption. This will result in balancing the air to fuel mixture and the engine will keep on working. Well start from the basics, and then we will move to the symptoms and the probable causes for this issue and how to solve them. When you put your key on the ignition you should hear a click from the back. A clogged fuel filter can cause the same issues as a fuel pump. The mass airflow sensor is the most common issue, because it easily accumulates dirt. Labor: 1.0. An affiliate link means we may earn advertising or referral fees if you submit your information through our links or forms. If so, then you may have a problem in need of immediate attention so that you dont do further damage to your engine. Not for a "Too Lean" code. In the same manner, when there is too much oil or in other words, when there is not enough fuel, your vehicle will be running lean, which usually is displayed with a check engine light illuminating and associated with a P0171 code if the issue is on the Bank 1 and another code if the issue is affecting Bank 2 of your engine. This rough idle is a clear indication that you are having a problem with your ignition system. It Hi and thanks for contacting YourMechanic. Youll also have to consider that if your job takes less than an hour, the shop will probably round the cost up to an hour of work. Check for exhaust pipe leaks before the O2 sensor. The mechanic would then use the manufacturers technique to test the mass airflow and oxygen sensors. In doing so, it will save you thousands on mechanics that often misdiagnose cars, and you will not have to pay a lot of cash to fix problems that do not exist. Heres more info ontop-rated airport parking,the best parking spots in your city, the most affordableauto insurancefor your car, andtop-rated car washes near you. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. In most cases, you can lend these tools at a workshop if you ask nicely. Catalytic converters are very expensive to replace. Thus, you are balancing this by applying your foot on the gas pedal. This check engine light can be pretty annoying and you are probably will not enjoy it when you see it on your dash. Your email address will not be published. In this article, we are going to learn everything about the P0171 code. If you start replacing MAF sensors, O2 sensors, etc., you will probably spend a lot of money without results. This bank is where cylinder number 1 is located, thats why in the error message it says bank number 1. Chris communicated with us each step of the way up until his arrival. of the most important elements that any driver must keep an eye on. Here, costs will vary depending on whether you have to replace the valve, the sensor, or both. Again, friend cleared it out but this time it was only for one of the banks. On top of that, you can become proficient when it comes to mechanics and mechanical issues. 8 Best Catalytic Converter Cleaners of 2023, P0456 Code What It Means and How To Fix It, P0496 Code Meaning, Causes, Symptoms (& How To Fix), P0300 Code Meaning, Causes, Symptoms (& How to Fix it), P0442 Code What It Means and How To Fix It, P0455 Code What It Means and How To Fix It, P2181 Code Meaning, Causes, Symptoms (& How To Fix), P0700 Code - What It Means and How To Fix It, P0106 Code Meaning, Causes, Symptoms (& How To Fix), P0012 Code Meaning, Causes, Symptoms (& How To Fix), Electric Parking Brake Problems Causes & Fixes, Oil Coming Out Of Exhaust Causes & Fixes, 10 Symptoms Of A Bad Fuel Pump & Replacement Cost, Air intake/vacuum/boost pipe leak (Most common), Low fuel pressure (Caused by a bad fuel pump, filter, or, Replace faulty vacuum hoses or gaskets around the intake, Replace the fuel pump/fuel filter/fuel pressure regulator or repair wiring, Check the fuel pressure. Its a computer in your vehicle that monitors engine functions, so if it isnt correctly monitoring the air-fuel mixture, then this mixture could get imbalanced. In this case, youll most likely have to go to the dealer. The engines mass airflow sensor monitors how much air is going in, which means that if it isnt working correctly, you may end up with too much air. While theres no extra cost to you, it helps us support the costs to run this resource. P2096 Code: Post Catalyst Fuel Trim System Too Lean (Bank 1) P013E Code: O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 2) . However, fixing them can vary significantly in cost. Your vehicle is getting too much air and not enough fuel, creating a lean condition that disrupts the fuel efficiency of your vehicle. The O2 sensors have the ability to correct a fuel mixture of +-15%. To keep the engine operating properly, the powertrain control module (PCM) attempts to compensate for the lean state by injecting more gasoline into the mixture in an attempt to maintain the proper 14.7:1 ratio. If you notice this code, you should get it checked out as soon as possible. Here, most dealerships will charge around $145 per hour. You will also incur different taxes depending on where you go to receive auto labor and where you buy your parts online. Although not every trouble code will have a technical service bulletin associated with it, it is always wise to check. . What are the usual symptoms of a P0171 code? Check engine lights can be one of the most annoying things that could happen to any driver. We have a focus on strong photography, and engaging articles about performance, luxury and interesting cars. But first, lets discuss the next symptom and that is the rough idle of the engine that comes with the low engine power. Lets find out. This site contains affiliate links. This is a lean condition or a low fuel trim code. What Is P0541 Code On 7.3 Powerstroke & How To Fix? You dont know what they mean until you decide to scan the car for codes. Picture this -Your morning is going swimmingly, and youre on your way to work on time. If you would like to feature your brand or write a cost guide for us feel free to reach out to contact (at) costhack.com. If the fuel filter is clogged, you basically will be left with little or no fuel in the fuel line that goes from the filter to the engine. This code will not specifically prevent you from driving your vehicle. These scanner tools are fairly cheap and can be found anywhere online and in most car parts stores for $30. Some possible causes of a P0171 engine code are. Labor can also take anywhere from a few minutes to over 8 hours depending on the issue. Here, parts can cost anywhere from about $6 to over $1,000. owners, Over 25,000 topics, from beginner tips to technical As a result, the MAF sensor underreports airflow, leading the powertrain control module (PCM) to inject insufficient fuel to maintain a correctly balanced air/fuel ratio. This movement means that something in the combustion process is not right and needs checking. Cash Cars Buyer is one of the top-rated car removal companies in the nation that guarantees to pay you the top dollars and will provide you with free towing despite your living location around the United States. A dirty MAF sensor is one of the most common causes of P0171 in a Ford. The average cost of replacing a mass airflow sensor is about $275, whereas the cost of parts is about $230 and the cost of labor is about $40. But then you try to start your car and discover that your Check Engine light is on and the engine is running rough. Brandon showed up ahead of schedule, was very personable and diagnosed my problems. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. Thats since the PCM is telling the injectors to dump more fuel into the combustion chamber. So, what are the symptoms when you have a system too lean bank 1 problem? For example, if the mass airflow sensor is damaged, you can expect to pay a hefty price of $200 for a new part. If your car is giving you a System too lean: Bank 1 error, it means your fuel injection system is using too much air in the first bank of cylinders in your engine. Also, they are caused by other culprits as well, such as bad spark plugs or bad coils. Another symptom that comes along with the low engine power is the rough idle. What are the primary causes for the P0171 code? Get a fair and transparent estimate upfront, P0171 OBD-II Trouble Code: System Too Lean (Bank 1), Get a quote and book an appointment online, P0040 OBD-II Trouble Code: O2 Sensor Signals Swapped Sensor 1, P0051 OBD-II Trouble Code: HO2S Heater Control Circuit Low (Bank 2 Sensor 1), P0217 OBD-II Trouble Code: Engine Overheat Condition, P0182 OBD-II Trouble Code: Fuel Temperature Sensor A Circuit Low Input, P0162 OBD-II Trouble Code: Sensor Circuit Malfunction (Bank 2, Sensor 3), P2000 OBD-II Trouble Code: NOx Trap Efficiency Below Threshold Bank 1. The average cost to replace a fuel pressure regulator is $280, where the cost of parts is about $170 and the cost of labor is about $110. The sensor can only correct the mixture within +-15%, and if it is out of there, the p0171 code will be stored. A common diagnostic mistake is to start replacing parts without making a proper diagnosis. The mass airflow sensor is a part that determines how much air should go into the engine. When this happens, youll normally have to adjust or replace the regulator. Keep in mind that they mentioned causes are the very common primary reasons for a P0171 code. It is okay to drive for short distances to the workshop, but ignoring the code and continuing to drive may cause integral engine parts to take damage. A vacuum leakage downstream from the MAF sensor or a defective MAF sensor is the most common cause of a P0171 (too lean, Bank 1) code. How Much Does it Cost to Repair a P0171 Code Problem? Our guides, vetted by experts, ensure you are paying a fair price for whatever it is you are looking for. All Rights Reserved. Low combustion means a lack of power from the engine. Magnus is the owner and main author of Mechanicbase. If this affects you, your car would barely move on the road. In fact, the cost to repair the system too lean bank 1 error can range between $80 and over $1,000. If your exhaust or emissions system is having issues, it could reduce the flow of air from the exhaust back into the combustion chamber. The system too lean bank 1 or code P0171 problem means that there is lean fuel to air mixture on the first bank of your engine. P0171 is a "System Too Lean (Bank 1)," which is triggered by the first exhaust oxygen (02) sensor (aka upstream 02 sensor) on the "Bank 1" side of the engine (designated as whichever side has cylinder number one). Possible causes of a P0171 code are a vacuum leak, weak fuel pump, broken . A clogged fuel filter can also cause a lack of fuel in the engine. Check Engine Light diagnostic your travel and car related needs. We are going to discuss all the probable reasons after we cover all the symptoms of the system too lean bank 1 problem. In some cases, you may need to turn to the powertrain control module to find the source of a System too lean bank 1 issue. In addition, because hardware costs for fuel injectors are usually significantly lower than the cost of labor, replacing fuel injectors wont always greatly add to the total cost. All these can occur even before the check engine light illuminates. But, if its been a while and youre having problems with a lean fuel mix, its a good idea to check the filter. The lack of power will ruin your cars performance and you will get a check engine light as we mentioned above. It's very important to detect the P0171 code immediately after it occurs to prevent major complications to your vehicle. If the air ratio is above 14.7, the PCM is triggered and it dumps more fuel inside of the cylinder. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. If the fuel mixture isverylean, you may get any of the following symptoms: Moderate In most cases, the lean mixture is significant, and you will not notice any difference in the engines performance. The following issues can be caused by the P0171 code: There are many different solutions for the P0171 code, because there can be so many different causes. Instead, you may be able to simply adjust it to increase the pressure. Welcome to Motor Verso. That can add considerable time and cost to the repair. The cost to fix this problem depends on the component that is faulty in your system. Here, the mass airflow sensor, fuel pressure sensor, and EPG sensor are the primary culprits. Fuel injectors are the next most common cause of a lean bank error. All Rights Reserved. This is yet another source of the System too lean bank 1 error. This article explains the P0171 code causes, symptoms, and its fixing cost. If the problem still occurs and you havent found any problems with the mentioned parts above, it is time to diagnose your O2 sensor. Hi there. Increased fuel consumption will also be one of the symptoms if you are having a system too lean bank 1 problem. Once you do, you can expect the cost-to-fix to range between $80 and $1,000+. In fact, the issue can come from a clogged filter or from an exhaust leak or even fuel injector failure. The O2 sensor can correct a fuel mixture of +-15%. In this case, there is too much air in the engine and there is a lack of fuel inside. However, there are several other factors that can impact what you pay to clear a P0171 error code. The Air-To-Fuel Mix The engines vacuum and fuel pressure must be within the manufacturers standards to maintain a correct air/fuel ratio. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. A lean fuel trim code, such as P0171, creates performance issues that might result in costly damage. This means that the air to fuel mixture will be unbalanced and the check engine light may come on the dashboard. P0171 is a diagnostic trouble code (DTC) for "System Too Lean (Bank 1)". Basically, the valves will not work properly and will be open for too long until they remove all the unburnt air from the combustion chamber. These tools have been tried and tested by our team, they are ideal for fixing your car at home. Another part you may need to replace to help with a too-lean engine issue is the fuel pressure regulator. But if it's caused by a bad oxygen sensor or another bad engine sensor, you can expect a repair cost of $100 to $1,000 or more. Thats especially true if youre only seeing an error code for the first bank on the engine because if it were a software issue or an issue from the rest of the engine, its more likely to affect all of the banks. However, if you have an automatically adjusting regulator, it may not be possible. If you are a good troubleshooter, you can diagnose any problem easily. We learned that this problem happens on bank number one and it happens because the air to fuel mixture is too lean. The actual issue may not be a broken O2 sensor but rather low fuel pressure, engine vacuum leak, or dirty fuel injectors that cause the engine to run lean. A P0171 code or system too lean repair code means that your vehicles fuel injection system is having problems. Does your Hyundai have Safety Recalls? Repairing the P0171 issue may require replacing parts such as a vacuum leak fix, MAF sensor, fuel pump, fuel pressure regulator, or oxygen sensor, with estimated costs ranging from $100 to $1700 depending on the repair. This is since a PCV valve or an EVAP solenoid is only $15 to $30 to replace. If you notice how the car becomes thirstier, its a clear sign that something has to be checked and repaired. Professional Car Scrapping and Recycling: The Ultimate Guide, How To Get The Highest Payout For My Scrap Car? When you are experiencing a problem like this, the best thing to do is to open up the throttle body and see its condition. In addition, your cars catalytic converter could be damaged if this code is stored for a long time. P1137 - Downstream Heated Oxygen Sensor 1 Malfunction; P1151 - System Too Lean (Bank 1) In some cases, you'll be able to repair the problem easier if you look at the trouble codes altogether.