Your engine is not complete without a working throttle position sensor. It is designed to transmit information to the Electric Control Module about the position of your Porsche’s throttle. It is made up of mechanical components which become worn out over time. Replacement then becomes imminent. To ensure the throttle position sensor works as it should, inspect it regularly. Anything short of perfect maintenance means the throttle position sensor will malfunction. It will then relay erroneous data to your Porsche’s computerized system. The end result will be poor fuel economy. Before then though, you will notice the following symptoms.
Porsche models are known for class and elegance. Over and beyond these two popular perks also lies the fact that Porsche models never disappoint when it comes to speed. So when you accelerate and the car takes time to pick up speed or jerks before it picks up speed, the most likely culprit would be a faulty throttle position sensor. Your car can also pick up speed suddenly without you stepping on the gas pedal.
All these symptoms mean that the throttle position sensor is not providing enough input. As a result, the onboard computer finds it hard to direct the engine to work as it should. When the car suddenly accelerates while on the move, then the butterfly valve in the throttle has closed up. It pops up suddenly when you step on the accelerator. This gives your car an unintended thrust of speed that happens because sensor fails to detect the throttle’s closed position.
Engine Idles Slowly
Engine stalling and misfires can be annoying. They do not occur out of the blue though. So when you notice rough idling even when the engine is off or when the engine simply stalls know for sure that the throttle position sensor is about to fail. The computer in this case is unable to quickly identify the shut throttle. The TPS then sends bad input which ends up stalling the Porsche engine when you least expect.
Car Does Not Exceed Speed
This is yet another sign that the TPS has failed or is about to fail. It simply means that the TPS is falsely or erroneously limiting the power requested by the accelerator pedal. Your car will therefore accelerate but you’ll notice it won’t go beyond 30 MPH. This symptom tends to go hand in hand with loss of power.
Check Engine Light
The throttle position sensor is strange in several ways. It may fail and cause the Check Engine Light to come on or it may be about to fail and the Check Engine Light will stay off. In simple words, do not rely on the Check Engine Light to fix any of the aforementioned problems. The best you can do is to take appropriate measures the moment you notice something wrong with the engine. On that note, be particularly keen on how your Porsche behaves when you accelerate and when you switch off the engine. Then be sure to have a licensed and duly approved Porsche mechanic to inspect and fix all TPS related issues on your car.