Does anyone have an idea what this code stands for? I have a 1996 Camry 4cyl with 85000 miles. My scan reader tells me only to see Toyota. The vehicle acts normal, except for the check eng light. I haven't gone through a tank of gas to know whether my mpg has dropped off. Prior to this I had a PO171 and a PO125. I changed the O2 sensor in bank 1 and that seemed to resolve the problem.
When the car was new, I took a base line of how the car was running at idle and at 55mph, in anticipation of a future problem. My LTF1 and STF1 readings were off after the MIL went on. I also had a sulfur smell just prior to the light going on. The new ox sensor returned the reaqdings to just the way they read when I took the base line. Three days later, I now get the P1133 code. Any clues out there.\?