maximus2 Posted August 29 Share Posted August 29 Good evening all, Thank you for taking the time at looking at this thread. I have a 2002 Lexus ES 300 that keeps throwing "System Bank 2 Too Lean" code, sometimes Bank 1 too lean is also in pending codes but disappears. I know that vacuum leaks are a slim possibility since i replaced most of the hoses and replaced faulty VSV's, along with the MAF sensor reading around 3.6-3.9 g/s at idle. The alternator and battery are brand new. It used to throw a EVAP System code as well as a Bank 2 Catalyst below threshold code, but now i never see them come up since i replaced the alternator and battery. Its very slight, but i can tell the engine is not running at its best overall. I recorded both banks at operating temp and idling, and here's what has consistently come up: -B1 S1: 3.337v -B1 S2: 3.454v -B2 S1: 0.760v -B2 S2: 0.445v I didn't see any further but for bank 2 for both sensors, the short term fuel trim is 99.2%. This is the short and long term fuel trim for both banks overall: -Short trim B1: 0.1% -Long trim B1: 31.2% -Short trim B2: 0.9% -Long trim B2: 35.3% Any help would be greatly appreciated before i fire the parts cannon at my car, budget is not a problem to me and i love this car dearly. Thank you all! Quote Link to comment Share on other sites More sharing options...
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