Oct 10, 2018 · P0171 Definition The P0171 code means that, on the first bank of the engine, the fuel system is running weak (or lean) or a vacuum leak exists near this side of the engine. A …

Jan 5, 2013 · RX - 2nd Gen (2004-2009) - FINALLY SOLVED! P0171 and P0174 Codes!!!! - P0171 and P0174 I know this is long, but if you've had these codes, please read the entire …

Feb 12, 2018 · LS - 1st and 2nd Gen (1990-2000) - 98 Lexus LS 400 p0171 and cannot figure out fix - I have a 98 Lexus LS400 with the p0171 code. I have replaced the MAF sensor, all o2 …

DTC P0171 System Too Lean (Bank 1) DTC P0172 System Too Rich (Bank 1) DTC P0174 System Too Lean (Bank 2) DTC P0175 System Too Rich (Bank 2) DESCRIPTION The fuel …

Dec 30, 2016 · Engine DTC Chart PDF A chart that details diagnostic trouble codes (DTCs) for a 2002 Lexus LS430. The chart lists various codes associated with engine performance and …

Nov 28, 2017 · P0171 PDF A documentation that provides detailed diagnostic procedures for detecting and addressing system fuel issues in vehicles. The document covers DTC codes …

Dec 20, 2001 · ES - 1st to 4th Gen (1990-2006) - Forum discussion, how-to guides, and technical help for the Lexus ES300, ES330, and ES250.

Jan 8, 2026 · IS - 3rd Gen (2014-present) - Third-generation Lexus IS forum discussion, how-to guides, and technical help.

Jan 30, 2012 · A technical documentation that outlines diagnostic trouble codes (DTC) related to fuel system imbalances in vehicles, specifically for 'System too Lean' or 'System too Rich' …

Dec 21, 2025 · IS F (2008-2014) - Lexus IS F forum discussion, how-to guides, and technical help.