INFINITI M37 check engine light issue with code P0171 indicating lean bank condition on INFINITI M37

Some INFINITI M37 owners report experiencing issues when the check engine light activates with the OBD2 code P0171, indicating a lean condition in bank 1 of the engine. This code suggests an imbalance in the air-fuel mixture, often due to factors such as disconnected hoses, vacuum leaks, or a weak fuel system. Symptoms associated with this issue may include reduced power, rough idling, and hesitation during acceleration, along with an increased risk of engine misfire. To resolve the P0171 code, owners should diagnose the problem using a scan tool, inspect the intake system and vacuum lines for leaks, and check the mass airflow sensor and fuel injectors for faults. Prompt attention to these issues is crucial to maintain optimal engine performance and prevent further damage.