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 post as it will explain …

ES - 1st to 6th Gen (1990-2018) - 99 es300 P0171, and P0500 Codes - Bought this car in late February. Noticed it would start stalling when you floored it. Seller said it was an oxygen sensor and included a …

IS - 2nd Gen (2006-2013) - P0171 P0174 Solved - I recently got this 2008 IS250 AWD. I knew it would need some work, and one of the issues was that the CEL, VSC, and TRAC lights were on. Codes …

Mar 31, 2026 · LS - 4th Gen (2007-2017) - P0171 that wont leave - Hello everyone! I have a 07 460 with a drastic system too lean code in bank 1 and have replaced, exhaust manifold gaskets, o2 sensor, …

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 lean …

Sep 23, 2012 · SC - 1st Gen (1992-2000) - P0171- help - My car has a code p 0171. My car idle like crap when cold and better when it's warmed up. When I turn on the a/c the idle drops to about 500 …

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 sensors.

Oct 9, 2025 · LS - 1st and 2nd Gen (1990-2000) - Check engine light P0171 - 1996 Lexus LS400 - 208k miles So had something weird happen with my lexus today. If this relates to the story I did have to …

Feb 14, 2010 · GS - 2nd Gen (1998-2005) - P0171 finally fixed?!?! - I've been trying to locate and fix the problem that was causing me to get recurring P0171 code on my 99 GS400 (95K miles). I did all the …

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 post as it will explain EXACTLY …