I am working on a 2000 Lexus RX300 (3.0L V6, 25,000 miles). The MIL has turned on and I am reading a P0171 code (too lean, Bank1). The freeze frame is showing LTFT B1 29 and LTFT B2 35. I have looked for all obvious vacuum leaks, the car runs great,smooth, pow... Login to read more.