If you're like most people, you probably don't think too much about your throttle position sensor (TPS). But this small sensor has a big job. It tells your car's computer how far you're pressing the gas pedal. That information is used to help control the engine's air/fuel mixture, timing, and emissions controls.
If you need to replace your TPS, it's important to do a proper reset of the sensor. Otherwise, your car's computer won't be able to properly calibrate the new sensor. That can lead to all sorts of drivability issues.
Here's a quick guide to resetting your TPS:
1. Start with the key in the ON position.
2. With your foot off the gas pedal, slowly depress and release the pedal 3 times.
3. On the third time, hold the pedal down for 5 seconds.
4. Turn the key to the OFF position.
5. Start the car and check for proper operation.
If you're having trouble resetting the sensor, consult your car's owner's manual. You may need to perform a more complicated procedure.
In general, it's a good idea to replace your TPS every 50,000 miles or so. That way, you can be sure that your car is getting the most accurate information about your gas pedal input.