I drive a 2002 honda civic and each time i slow down while driving it vibrates and jerks then goes off, i was told its the sensor which has been replaced but it still happens. Pls i need help urgently.

What kind of transmission do you have on that car(manual or auto)? is the check engine light on?did you run a scan?what sensor did you change? i'm suspecting you might have an rpm-related vibration say like to low idle running.or it might be something from the transmission,try put it in neuyral when slowing down.
If your vehicle suffers from an annoying vibration, take it to a reputable mechanic. Have them test drive the car. They should be able to diagnose the problem and recommend a solution for the problem.