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 …

Details on causes of DTC P0171 and troubleshooting steps. Common fixes include cleaning the MAF sensor and repairing for vacuum leaks.

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 air, not …

Learn what the P0171 code means, what causes a lean fuel mixture, and how to fix it.

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 the P0171 …

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 …

Dec 15, 2025 · Decode P0171 (System Too Lean). Learn the causes, step-by-step diagnostic procedures, and effective repairs to clear your check engine light.

Feb 27, 2025 · Since a P0171 code means the engine is running too lean, diagnosing the problem involves checking for air leaks, fuel delivery issues, and sensor malfunctions. Below is a step-by-step …