how to fix P0302 code in my Toyota Highlander Third Generation (2014-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Locate cylinder 2 spark plug.
3. Use a spark plug socket to remove the spark plug.
4. Inspect the spark plug for wear or damage; replace if necessary.
5. Adjust the gap on the new spark plug to the manufacturer’s specifications (typically around 0.043 inches for Toyota).
6. Install the new spark plug and torque it to the specified value (typically 13 lb-ft).

3. Check and Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil for cylinder 2.
2. Remove the mounting bolt securing the ignition coil.
3. Pull the ignition coil straight out and inspect it for cracks or damage.
4. If faulty, replace it with a new ignition coil.
5. Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect Fuel Injector

1. Remove the intake manifold (if necessary) to access fuel injectors.
2. Disconnect the fuel injector connector and unscrew the fuel rail mounting bolts.
3. Carefully remove the fuel rail with injectors attached.
4. Inspect the injector for clogging or damage. Clean or replace as needed.
5. Reassemble by reattaching the fuel rail and connectors.

5. Clear Codes and Test Drive

1. Reconnect the battery terminal.
2. Use an OBD-II scanner to clear the P0302 code.
3. Start the engine and monitor for smooth operation.
4. Take the vehicle for a test drive to ensure the issue is resolved.