Throttle Position Sensor (TPS) - Monitors Throttle Valve Position
Throttle Position Sensor (TPS) – Monitors Throttle Valve Position

Choose Your Throttle Position Sensor (TPS) Help Topic Below

Throttle Position Sensor (TPS) – Function – Failure – Testing


So, The throttle position sensor (TPS) monitors; how far open the throttle valve (or blade) is open. Consequently, Determined by; how far down the accelerator pedal has been pushed. Also, The throttle position controls the amount of air; that flows into an engine’s intake manifold. So, The wider it is open; the more air is able to flow in. In contrast, The less that it is open; less air is able to flow in.

So, The position of the throttle; and how quickly it’s opening and closing is transmitted to the (ECM). Consequently, The computer uses that information to decide; how much fuel is injected into the engine and the spark timing.

What can happen when it malfunctions:

  • It can trigger a “check engine” warning light
  • It causes the engine to idle roughly; surge, hesitate or stall

As a result, The engine control module (ECM); doesn’t know where the throttle position is. Therefore, It can not correctly; set the fuel mixture or ignition timing.

Symptoms of a bad (TPS):

  • Check engine light is on.
  • Engine has little or no acceleration.
  • Car bucks or jerks violently.
  • Engine surges and stalls out.
  • Engine starts and dies immediately.
  • Poor fuel economy.
  • Engine cranks but, fails to start.
  • Car goes into limp-home mode.

Replacing the throttle position sensor (TPS) can be straightforward; depending on the model; but the hardest part of the procedure is the diagnosis. As a result, You will need to have the proper diagnostic equipment.

So, It is a small sensor; that’s about the size of your key fob. Also, It has an electrical connector attached to it; that normally houses three wires. On most engines, there are two smaller screws; that secure it to the throttle body.

Thank You !