My lean code, P0171 was caused by a crack in the nearest rubber intake 'hose' next to the runner intake. Used a toyo oem part and purrs like a kitten now! Luck and enjoy the Runner!
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2001 Limited 4WD - 346+K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL - StopTech ANGLED rotors - In series 699 trans cooler, New Yota1 transmission, All new OEM suspension front to rear.