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 …

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.

Dec 31, 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 …

Oct 29, 2024 · Here's everything you need to know about the P0174 error code, including how to diagnose and, most importantly, how to repair this issue.

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 …

Jan 27, 2025 · What does the P0174 – System Too Lean Bank 2 mean? The P0174 code indicates a “System Too Lean” condition specifically for bank 2 of your engine. In simpler terms, it means that …

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 …

1 day ago · Comprehensive guide to Code P0174. Identify the symptoms of a lean condition on Bank 2 and follow expert diagnostic steps to isolate and repair the root cause.