I have a an '01 AWD RX300 in the shop with p0171 and p0174, banks 1 and 2 respectively lean. The ECM is adding fuel accross the rev range, 33%@idle 30%@2500-3000. The vehicle has an extended crank time to start, 10 seconds. Has no oomph when at WOT. It acts li... Login to read more.