skartik

Hello everyone, I am new to this Forum and hoping to get some answers. I own a Toyota Avalon XLS 1998 model. The check engine light is on and the mechanic found out that it came out with P1135 codes. He replaced the 02 Sensor (Upstream or Left Hand Front) and reset the circuitry to clear the memory. I drove it for 3-4 miles and the light came back on. I am trying to get as much information since I do want the mechanic to take me for a ride. Any help will be highly appreciated. Thanks