Fuel trim (FT) system too lean, bank 1 - TroubleCodes.net YourMechanic All rights reserved. If one of the mentioned DIY's above resolved your issue, do not expect that the P0171 code will clear itself. Applying more gas means that more gas than is necessary is injected into the cylinder. The cost to fix this problem depends on the component that is faulty in your system. Most auto repair shops charge between $75 and $150 per hour. The cost of your repair will heavily depend on what the cause of the error code is. For example, if you have a brand new Audi Q7 and you take it to the dealer, youll probably pay about $600. After you clean the sensor, you can place the sensor back in its position. The mass airflow sensor is the most common issue, because it easily accumulates dirt. 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. This is the case because there is too much air into the cylinder that is sucked in from the intake. So, you pull out your trusty OBD II scan tool or code reader and discover that you have a P0171 code on your vehicle. Symptoms of the P0171 code. Remote start stopped working and check engine light went on. Unmetered air would reaching the cylinders would cuz lean fuel mixtures on both banks at the sametime unless there is a problem both O2 sensors. If that's the case, the problem is most likely due to a bad Fuel filter, faulty fuel injector, or malfunctioning fuel pump. Mechanics will usually use advanced equipment to troubleshoot the problem. The engines vacuum and fuel pressure must be within the manufacturers standards to maintain a correct air/fuel ratio. How much does it cost to resolve the P0171 code? A vacuum leak or a poor fuel system that does not inject enough fuel into the air-fuel mixture can cause lean conditions in a Chevy, while a dirty or defective MAF sensor or a vacuum leak downstream of the MAF sensor may cause P0171 in a Toyota. Is your car working strangely lately? The mass airflow sensor is a part that determines how much air should go into the engine. A lean condition occurs when the engine either receives too little fuel or too much air. Chevrolet, Cadillac, Buick, and GMC P0171. We have a team of writers working daily on common car problems. Check Engine Light diagnostic However, fixing them can vary significantly in cost. For example . Does your Hyundai have Safety Recalls? In addition, some vehicles have the fuel pump installed inside the fuel tank. 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. What Is P0541 Code On 7.3 Powerstroke & How To Fix? This, hopefully, is going to solve your problem. A common mistake is failing to look at any technical service bulletins for your specific car model that may be relevant to this issue.