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Throttle Position Sensor

Frequently Asked Questions

Located between the air filter and the intake manifold, the Throttle Position Sensor, or TPS for short, is a type of tube with a pivoting flap that controls the amount of air entering the car's engine.  Using this sensor data, the computer measures the engine load, adjusts the ignition timing, fuel supply, EGR, torque converter clutch, and sets the engine's dewatering mode. The throttle position sensor therefore plays a key role in balancing air intake and fuel metering to ensure optimum combustion and better engine performance.

If you disconnect the throttle position sensor, the engine control system will no longer receive a signal indicating the throttle valve angle. As a result, the engine may experience a variety of problems, including idle control problems, poor acceleration, and even stalling.

Step 1: Locate the sensor. The throttle position sensor is located on the throttle body above the engine.

Step 2: Disconnect the battery negative cable. Disconnect and set aside the negative battery cable.

Step 3: Remove the electrical connector from the sensor. Remove the electrical connector by pressing on the tab and sliding it out.

Step 4: Remove the sensor mounting screws. Use a screwdriver to remove the sensor mounting screws.

Step 5: Remove the sensor. Remove the sensor from the engine.

Step 6: Install the new sensor.

Step 7: Install the sensor mounting screws by hand, one at a time. Then tighten with a screwdriver.

Step 8: Reinstall the connector in the same manner as it was removed.

Step 9: Reinstall the negative battery lead.

Step 10: Adjust the throttle position sensor if necessary.

Step 1: Park your vehicle on a level surface and turn off the engine. Make sure all accessories, such as lights and air conditioning, are also turned off.

Step 2: Locate the throttle position sensor.

Step 3: Carefully disconnect the electrical connector attached to the TPS.

Step 4: With the TPS disconnected, turn the ignition key to the "ON" position without starting the engine. Leave it in this position for approximately 30 seconds to allow the ECU to reset.

Step 5: At the end of the reset period, reconnect the electrical connector to the TPS.

Step 6: Start the engine and let it idle for a few minutes. This will allow the ECU to re-learn the throttle position and adjust accordingly.

After removing the old throttle position sensor, you need to install a new one:

Step 1: Install the new throttle position sensor, reconnect the harness wiring and don't worry about adjusting it.

Step 2: Reinstall the throttle body. You can use the new gasket for the intake manifold and throttle body.

Step 3: Tighten all nuts and bolts.

Step 4: Put the two return cooling hoses on, as well.

Step 5: Make sure to plug the connectors into the throttle position sensor.

Step 6: Reinstall the cables for the cruise control and throttle.

Step 7: Place the rubber air return hose on.

Step 8: Perform a test drive to check that everything is working correctly.

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