what does code P0302 mean for my Toyota Highlander

Solution

1. Preparation

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

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover (if applicable) to access the ignition components.
• Remove the spark plug from cylinder 2 using the spark plug socket. Inspect for wear or fouling.
• Replace the spark plug with a new one that meets OEM specifications (typically NGK or Denso).
• Remove the ignition coil from cylinder 2. Inspect it for cracks or damage.
• Replace the ignition coil with a new one if necessary.
• Reinstall the ignition coil and torque to manufacturer specifications.

3. Check and Replace Fuel Injector

• Tools Required: Fuel injector puller (if needed), O-ring lubricant
• Disconnect the electrical connector from the fuel injector for cylinder 2.
• Remove the fuel rail bolts and carefully lift the fuel rail to access the injector.
• Remove the fuel injector from the rail and inspect its condition.
• Replace with a new fuel injector if defective. Ensure proper lubrication of new O-rings.
• Reattach the fuel rail and reconnect the electrical connector.

4. Address Vacuum Leaks

• Visually inspect all vacuum hoses connected to the intake manifold for wear or disconnection.
• Replace any damaged hoses to ensure a proper seal.

5. Reassemble and Reconnect Battery

• Reinstall any components removed for access.
• Reconnect the battery terminals.