How to Check the TPS on a Ford 2.3 L

Written by kyle sanstrom
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The throttle position sensor (TPS) on a Ford 2.3-litre engine measures the amount that the throttle is open and expresses this measurement in a percentage value. The power train control module (PCM) uses this data to make specific calculations about how to best manage the engine. When the TPS fails, the PCM receives no data about the throttle position and cannot effectively control the engine. Replacement throttle position sensors are available from auto parts stores and licensed Ford dealerships.

Skill level:
Moderate

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Things you need

  • Automotive scan tool

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Instructions

  1. 1

    Shift the vehicle's transmission into park (or first gear on a manual transmission) and turn off the engine. Set the parking brake and turn the ignition to the "ON" position without starting the engine.

  2. 2

    Connect an automotive scan tool to the vehicle's diagnostic data port underneath the dashboard on the driver's side.

  3. 3

    Slowly depress the accelerator until it reaches the floor while watching the scan tool's display. The scan tool should read "0%" before the accelerator is depressed and should gradually increase to "100%" once the accelerator bottoms out on the floor. If the scan tool does not respond to the movement of the accelerator, then the TPS is faulty and must be replaced.

Tips and warnings

  • An automotive scan tool is a small, hand-held diagnostic computer designed to perform specific tests on passenger vehicles. Scan tools are available from auto parts stores and automotive tool retailers.

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