Jan 10, 2025 · Learn what's causing your engine to run too lean and triggering the P0171 code, and how to fix it before it leads to costly repairs.

Aug 19, 2024 · The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0171 is set in along with the P0174 code, it is …

Diagnostic trouble code (DTC) P0171 stands for “System Too Lean” (Bank 1). The air-fuel mixture with too much air and little gasoline could trigger this trouble code. Lean Mixture = Too much …

Oct 16, 2025 · In this article, we’ll explore the common causes of code P0171 and provide you with the knowledge you need to diagnose and fix the problem before it causes serious damage …

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.

Apr 11, 2025 · Code P0171, officially designated as “System Too Lean (Bank 1)” by the Society of Automotive Engineers, signals that your engine’s air-fuel mixture contains too much air and …

The guide below explores the common symptoms and causes of the P0171 DTC code to help car owners better understand the steps involved in diagnosing and repairing the root of the problem.

A P0171 code, “System Too Lean (Bank 1),” means your engine is running with too much air or too little fuel, triggering the check engine light and risking damage if ignored. This guide covers …

5 days ago · Diagnosis and Repair Strategies Addressing the P0171 code begins with utilizing an OBD-II scan tool to retrieve the “freeze frame” data, which records the engine …

Jun 12, 2025 · Learn what the P0171 code means, what causes a lean fuel mixture, and how to fix it. Find symptoms, repair tips, and costs. Don’t ignore this warning!