Toyota Repair: 97 camry check engine light, air fuel ratio, air flow meter

Question
Hi Ted. My check engine light for a 97 4cyl camry (100k miles) recently came on and i had it scanned. The codes that came up are:

p0125 (closed loop fuel control insuff. coolant temp)
p1135 (control fuel air metering)
p0171 ( system too lean)
p1133 (control fuel air metering)
p1135 (repeat)

I've searched forums and websites and narrowed it down to the Air fuel sensor.  Can you please help out and let me know your input on it. Thanks i really appreciate it.  

Answer
The only two codes that are of any significance are the 1133 and the 1135 the rest are probably what we call "victim" codes, my recommendation is to replace the air fuel ratio sensor, remove the air flow meter and clean it, replace the air filter, that should take care of all the codes.