what does code P0302 mean for my Toyota Highlander Fourth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the spark plug from cylinder 2.
3. Inspect the spark plug for wear or fouling. Replace if necessary.
4. Apply anti-seize lubricant to the threads of the new spark plug.
5. Install the new spark plug to the specified torque (usually around 13-15 lb-ft).

3. Check and Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil on cylinder 2.
2. Remove the mounting bolts and take out the ignition coil.
3. Inspect for damage or wear. Replace if faulty.
4. Install the new ignition coil and reconnect the electrical connector.
5. Ensure the mounting bolts are tightened to the manufacturer’s specifications.

4. Inspect and Clean Fuel Injector

1. Access the fuel injector on cylinder 2 (may require removal of the intake manifold).
2. Use a fuel injector cleaning kit to clean the injector or replace it if clogged.
3. Reinstall the fuel injector securely and reconnect any electrical connectors.

5. Compression Test

1. Remove the spark plug from cylinder 2.
2. Insert a compression gauge into the spark plug hole.
3. Crank the engine and record the compression reading. Compare with specifications (usually around 180-200 psi).
4. If low, diagnose further for potential internal engine issues.