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

Jan 10, 2025 · When your car’s onboard computer stores a P0174 code, it’s indicating a problem with the fuel trim system on bank 2 of the engine. This code signals a lean condition, meaning there’s an …

Fix the P0174 “System Too Lean” code. We detail how to pinpoint the exact cause (air, fuel, or vacuum) and provide actionable repair steps.

Jan 9, 2025 · What does the P0174 System too Lean (Bank 2) mean? P0174 code gets triggered when the Engine Control Module receives an input signal from the oxygen sensor —also called the air-fuel …

Sep 12, 2025 · Is your car showing a P0174 code after scanning your check engine light? This code points to too much air in the engine, causing your car to run lean as opposed to running rich. In this …

Aug 27, 2024 · Code P0174 means the engine’s Bank 2 is running too lean, with too much air or insufficient fuel in the air-fuel mixture. Several issues can trigger a P0174 code, including vacuum …

This guide covers the P0174 code’s meaning, symptoms, causes, and pro-level diagnostics to fix it fast—potentially saving you $500-$1,500. What Is a P0174 Code?

Feb 20, 2025 · More specifically, a P0174 is most often reported on Chevy and Ford vehicles. If your vehicle is triggering a P0174 code, read our guide below to learn more about the issue and find out …

Quick Summary P0174 = “System Too Lean – Bank 2” – the power‑train control module sees a low air‑fuel ratio on the second cylinder bank. Typical driver‑visible signs: check‑engine light, rough idle, …

When a code P0174 is set, it means that the Fuel Trim is anywhere from 15 percent to as high as 35 percent compensated. When this happens, the computer knows that there is an improper condition in …