my Toyota Highlander has a P0302 code what does it mean

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface with the engine off and cooled down.
• Disconnect the negative battery terminal for safety.

2. Spark Plug Replacement

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if present.
• Disconnect the ignition coil connector and remove the coil from cylinder 2.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for signs of wear (carbon buildup, electrode wear).
• Install a new spark plug, applying dielectric grease to the boot.
• Torque the spark plug to the manufacturer's specification (typically around 13-15 lb-ft).

3. Ignition Coil Inspection/Replacement

• Tools Required: Socket set, multimeter (if testing).
• If the spark plug was fine, test the ignition coil using a multimeter to check resistance.
• If faulty, replace the ignition coil with a new one.
• Reconnect the ignition coil connector and reinstall the engine cover.

4. Fuel Injector Check

• Tools Required: Fuel injector cleaner (if cleaning), or replacement injector.
• Disconnect the fuel injector connector for cylinder 2.
• Inspect for corrosion or damage; clean it if necessary.
• If the injector is faulty, replace it with a new one and reconnect the connector.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine and observe the compression reading.
• If the reading is below specifications, further engine repairs may be necessary.