P0171 Code Explained: Causes, Diagnosis & Fix for Vacuum Leak / System Too Lean Bank 1
1:23
YouTubeAutoLine Pro
P0171 Code Explained: Causes, Diagnosis & Fix for Vacuum Leak / System Too Lean Bank 1
Dealing with a P0171 code? This common engine code means your system is running too lean on bank 1 — usually caused by a vacuum leak, faulty oxygen sensor, or mass airflow issues. In this short video, we’ll explain the causes of P0171, how to spot a vacuum leak, and the best way to diagnose and fix P0171 using tools like a smoke machine ...
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