Question

What happens when the throttle position sensor is bad?

What does a vehicle do when the throttle position sensor has gone bad?

Answer 1

A bad or failing throttle position sensor can cause problems such as hard starting, rough idling, loss of engine power, increased fuel consumption, loss of engine power upon accelerating, slow idle, and failure to start as well as check engine light to come on.

A properly working throttle position sensor is essential to a properly running engine and to keep your vehicle from using excess fuel.

Engine spitting and sputtering is also a common sign of a bad throttle position sensor.

Answer 2

When the TPS or Throttle Position Sensor goes bad the throttle body may not open and the engine will not be able to run without air.

A bad throttle position sensor or TPS may cause erratic idling, stalling, and sudden surges of acceleration.

The car may not start when the TPS is faulty.

Your car may idle or misfire when stopped.

You may also notice that your car accelerates itself, hesitates to accelerate, or come to a halt altogether.

You may also face difficulty changing gears and experience other issues with the car's air conditioning, ignition timing (ignition system), or fuel efficiency.