what does it mean if my Toyota Highlander XU70 (2020-Present) has a P0302 code

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal.
• Allow the engine to cool down completely before starting work.

2. Replace Spark Plug and Ignition Coil

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the bolts securing the ignition coil and lift it out.
• Remove the spark plug from cylinder 2 using the spark plug socket.
• Inspect the old spark plug for wear or damage.
• Install the new spark plug to the manufacturer's recommended torque specification (typically around 13-15 lb-ft).
• Apply dielectric grease to the ignition coil boot and reinstall the ignition coil, securing it with the bolts.
• Reconnect the ignition coil connector.

3. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Fuel line disconnect tool, small container for fuel catch.
• Relieve fuel pressure from the fuel system by removing the fuel pump relay and starting the engine until it stalls.
• Disconnect the fuel line from the injector.
• Unscrew and remove the fuel injector from the rail.
• Inspect the injector for clogs or electrical issues.
• Replace with a new fuel injector if faulty, ensuring it is seated properly.

4. Check for Vacuum Leaks

• Tools Required: Smoke machine (optional), vacuum gauge.
• Inspect all vacuum hoses and connections around the intake manifold for cracks or disconnections.
• Use a smoke machine to detect leaks if available.
• Replace any damaged hoses or fittings to ensure proper sealing.