How do you replace a throttle position sensor?

Replacing a throttle position sensor, or TPS, requires having a scan tool, screwdriver and multimeter on hand. It is a medium-size job with some expertise in understanding how to read the on-board data link connector, or OBD. Check the owner's manual for the specific location.

To begin replacing the TPS, first locate the OBD data link connector. The owner's manual will contain the location if it cannot easily be located. Turn the key to the on position, but do not start the engine.

Follow the steps below to complete the replacement process of a TPS:

1. Plug the scan tool into the OBD data link connector. Turn on the scan tool and select the appropriate steps to read the diagnostic trouble code, or DTC.
2. Locate the TPS, using the owner's manual if necessary.
3. Disconnect the electrical connector from the TPS.
4. Test the resistance of the TPS with a digital multi-meter. Check to see if the resistance is out of specifications. If so, the TPS will need to be replaced.
5. Clean the sensor connector using an electrical contact cleaner or spray when removing the TPS.
6. Install the new TPS. Tighten the mounting screws and attach the electrical connector.
7. To complete the replacement, erase the DTC with the scan tool using the delete or erase command instructions.
8. To be sure the process for replacing the TPS has been successful, start the engine and check to see if the engine light returns.