Toyota Repair: 1997 Camry Diagnostic Codes, air fuel ratio, fuel air mixture

Question
My 1997 Camry Le 4 Cylinder 90.8k miles engine light lit up yesterday, and I immediately went to a local parts store where as a free service they provide OB diagnostics.
The part store's code reader indicated two codes P1133, and P1135.

The code reader also said to the effect "fuel air mixture control" (not exact words). The store employee said to call the dealer to see if they could tell me what was wrong.

Would you have any idea what the codes are telling me? I am not happy with the local dealers' service department, and I am hopefull to remedy this at home.

Thanks in advance

Answer
These codes refer to an air fuel ratio sensor malfunction, it's located on the exhaust manifold on the right side under the hood(standing in front)it has a wire harness coming from it that connects to a connector near the cylinder head, the harness is clamped with a plastic clamp to the upper radiator hose, replace this sensor to correct the problem.