Symptoms of a Bad or Failing Throttle Position Sensor:
Car won't accelerate, lacks power when accelerating, or accelerates itself. ...
Engine won't idle smoothly, idles too slowly, or stalls. ...
Car accelerates, but won't exceed a relatively low speed, or shift up. ...
Check Engine Light comes on, accompanied by any of the above behaviors.
Thats all from google.
Grab a mulitmeter and go test yours, that will tell you if its bad.