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 · The P0174 code indicates a lean fuel condition on bank 2 of the engine, which can lead to poor fuel economy, rough idling, and engine damage. Vacuum leaks, faulty oxygen sensors, …

Basically this P0174 code means that the upstream oxygen sensor in bank 2 reporting a lean condition (too much oxygen in the exhaust). On V6/V8/V10/V12 engines, Bank 2 is the side of the engine that …

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.

Most of the time, a P0174 is caused by vacuum leaks, a dirty MAF sensor, or unmetered air sneaking in through an exhaust leak. In this guide, I’ll show you what P0174 means, the most common causes, …

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 …

Dec 16, 2025 · The P0174 diagnostic trouble code is a standardized signal from your vehicle’s On-Board Diagnostics (OBD-II) system, indicating a fuel mixture imbalance. This code translates to “System …

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?

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 …

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 …