why does my Toyota Camry XV50 rev up by itself when in park

Solution

1. Preparation

• Gather tools and materials needed for the repair.
• Disconnect the negative battery terminal to prevent accidental electrical shorts.

2. Clean the Throttle Body

• Remove the air intake duct connected to the throttle body.
• Clean the throttle body using throttle body cleaner and a soft cloth to remove carbon deposits.
• Ensure the throttle plate moves freely and closes completely.

3. Inspect and Clean the IAC Valve

• Locate the IAC valve and disconnect the electrical connector.
• Remove the IAC valve from the intake manifold.
• Clean the IAC valve with an appropriate cleaner and ensure it moves freely.
• Reinstall the IAC valve and reconnect the electrical connector.

4. Check the APP Sensor

• Using a multimeter, test the voltage output of the APP sensor while slowly pressing the accelerator pedal.
• Replace the sensor if the output does not correspond with the expected values.

5. Inspect Vacuum Lines

• Visually inspect all vacuum lines for cracks, breaks, or disconnections.
• Replace any damaged vacuum hoses found during the inspection.

6. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Monitor the idle speed to ensure it stabilizes after cleaning and repairs.