P0171 - System Too Lean

The Technical Definition: This code indicates that the air-fuel mixture is too lean, meaning there is too much air and not enough fuel.

Common Symptoms: Symptoms can include poor engine performance, stalling, and increased fuel consumption.

Typical Fix: You will typically want to check for vacuum leaks, inspect the Mass Air Flow (MAF) or Manifold Absolute Pressure (MAP) sensors, and ensure the fuel injectors are clean and functioning.