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 highly likely …

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.

Aug 20, 2023 · I looked into 28 cars with P0171 service cases from iatn.com private forums where mechanics seek advice. This helps you decide how to fix your issue and see what real mechanics do.

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.

Oct 16, 2025 · What Does Code P0171 Mean? OBD-II Trouble Code P0171 Description. A P0171 code indicates the air-fuel ratio entering your engine block is not ideal. Two main issues typically cause …

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 …

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 the P0171 …

Struggling with the P0171 code? Explore its causes, symptoms, and effective repair solutions to ensure your vehicle's air-fuel mixture is balanced and efficient.

Jun 4, 2025 · What Does the P0171 Code Mean? The P0171 trouble code stands for " System Too Lean – Bank 1. " This means that the engine control module (ECM) has detected that there's too …