2023年3月17日 · A P0171 code appears in the engine control unit when the oxygen sensor on bank 1 recognizes too lean of an air-fuel mixture for the sensor to correct it. Several different things could cause this trouble code.

6 天之前 · The “System Too Lean Bank 1” message indicates that the engine is running with an insufficient fuel-to-air ratio. This imbalance can cause poor engine performance, reduced power, and even stalling. Over time, continual neglect may result in damage to vital components such as the oxygen sensors or catalytic converter. These parts are ...

2024年10月21日 · The P0171 code indicates that the engine control module (ECM) has detected a lean condition in Bank 1 of your vehicle. Essentially, this means there’s an imbalance between air and fuel entering the combustion chamber.

2022年5月25日 · “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.

2021年7月10日 · 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.

P0171 or P0174 readings indicate too lean of a system in one of your cylinder banks. Learn common causes and solutions to these trouble codes.

2025年1月10日 · When your vehicle’s onboard computer triggers the P0171 code, it’s indicating that the fuel system is running lean on bank 1 of the engine, which means the air-fuel mixture is imbalanced, with more air than fuel.

2022年10月30日 · OBD II fault 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) receives input data from the #1 oxygen sensor or air/fuel ratio sensor on bank 1 indicating that the air/fuel mixture has been too lean for an extended period of time- usually about 20 ...

2023年12月21日 · P0171 indicates a lean air-fuel mixture in engine bank 1, causing low power and emissions issues. Common causes include faulty oxygen sensor, mass airflow sensor, PCV system leaks, vacuum leaks, bad air filter, clogged fuel …

2018年11月8日 · When dealing with a P0171 code, indicative of a lean fuel mixture in bank 1 of the engine, there are specific repairs that we can consider to resolve the problem. First, we must inspect the air filter and replace it if it is dirty or clogged.