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 …

ES - 1st to 6th Gen (1990-2018) - Rough Idle/Electrical/Misfiring P0171 CEL code 99 ES300 - Alright so lets start at the beginning, always a good place. About 6 months ago I bought subs, and amp for my …

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 …

ES - 1st to 6th Gen (1990-2018) - P0171 p0174 p2196 p2198 - For the last two, three weeks I keep getting the codes above. At first it was only P0171 and P0174 System Too Lean, but within the last …

ES - 1st to 6th Gen (1990-2018) - p0171 p0174 p0420 - I have a 2001 Lexus ES 300 that I bought used for essentially $2,000 6 years ago. It had over 200k miles on it but was in good shape. Over the …

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).