Toyota Repair: OBD II Trouble Codes - What Parts?, obd ii trouble codes, p0171 system too lean bank 1

Question
Please Help! My '97 Camry's Check Engine light came on (and yes I checked and the engine is there!). It is a 4 cylinder, automatic trans non Calif. car. According to the "Autoxray" OBD analyzer the following Trouble Codes came up: P0171 System Too Lean-Bank 1; P1130 A/F Sensor Performance Fault-Bank 1; P1135 A/F sensor Heater Circuit-Bank 1. Does the first code describe a condition and the others what parts needs to be replaced? What and where exactly are these parts? I think I can do the work myself if I knew what part or parts I need. Much Thanks, Sandi (Love the car-got 98,700 miles and lookin for well over 100K!)

Answer
I wish every thing was this easy, r&r the sensor with Toyota only, after market won't work, or I have not seen one that will. look under the hood find the sticker, you say non Cal, all the 97s I seen that come in here with AF sensors are cal, thats odd.