how to fix the P0302 code on my Toyota RAV4 Fourth Generation (2013-2018)?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical short circuits.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter
• Fuel injector tester (if necessary)

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector from the ignition coil.
• Remove the ignition coil by unbolting it and pulling it out.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the spark plug condition; replace if worn or fouled.
• Install a new spark plug, torque to manufacturer's specifications (typically 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Test and Replace Ignition Coil (if necessary)

• Using a multimeter, test the ignition coil for primary and secondary resistance.
• If it is out of specification, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect the connector.

4. Inspect and Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a fuel injector tester to ensure proper operation.
• If the fuel injector is faulty, replace it with a new one.
• Reconnect the fuel injector connector once the testing or replacement is completed.

5. Perform Compression Test

• Remove the spark plug from cylinder 2 and attach the compression tester.
• Crank the engine several times and record the compression reading.
• Compare the reading with specifications; if low, further diagnosis will be required.

6. Check for Vacuum Leaks

• Inspect the intake manifold gaskets and vacuum hoses for signs of wear or damage.
• Use a smoke machine or carburetor cleaner around the intake area to check for leaks.
• Repair or replace any damaged components found during inspection.