Is your check engine light on? Has your car been stalling, surging, or hesitating, you may have a faulty throttle position sensor (TPS). The TPS is responsible for relaying information about the throttle position to the car’s computer. When it’s not functioning properly, the result is often poor fuel economy. You might also notice the engine running rough or cutting off. What seems like just an inconvenience can eventually take a toll on your wallet. If you’ve noticed these problems, now is the time to have your vehicle checked.