The throttle position sensors that are usually adjustable are which type?

• A. Stock
• B. Aftermarket
• C. Adjustable
• D. Non-adjustable

Answer: (B)

When tuning or upgrading an engine, the throttle position sensor that you’ll typically find with an adjustable setup comes from aftermarket parts. Factory (stock) TPS units are calibrated at the factory and aren’t meant to be user-adjusted, so they don’t usually offer an adjustment mechanism. Aftermarket TPS options are designed with calibration in mind, providing an adjustable range so you can precisely set the voltage output to match the throttle opening. This helps maintain accurate throttle readings and proper ECU mapping when you’ve changed hardware (like a different throttle body or intake) or altered airflow. So, the type that’s usually adjustable is the aftermarket kind.