Hy everybody, my first post :D Sorry if my enlish is not to good My father's car (Corolla 2000 1.4vvti) has the same problem, the light on and the slight hesitation in aceleration. He goes to toyota and they substitute the O2 meter, but the car continues with the same problems. Once i drive the car and pushed all the shifts to 4000 rpm, and the car starts to get less problems of hesitations, but my father don't acelarate too much. One more thing, this problems appeared more or less one year later then my fhater buy the car, but happened rarely. I'm thinking to make a reset to ECU, mainly because of the symptoms that ocure when I drive de car. One question off topic, to reset ECU? disconnect the negative battery, wait 5 minutes and press the break pedal?