1995 Toyota Corolla Q&A

1995 Toyota Corolla Question: Is my ecu bad?

Sometimes when i'm driving either on the highway/city, my speedometer will start fluctuating and will hesitate to accelerate/jerk. It will snap out of it eventually and return to normal driving. The "O/D off" light will start flashing code 11. What do you think the problem is? -
Answer 1
could be a bad speed sensor -
Comment 1
My speed sensor + shift control solenoid were replaced.. no luck :/ -
Comment 2
could be the instrument cluster -
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