what does it mean if my Toyota Highlander is throwing a P0302 code

Solution

1. Preparation

• Gather all necessary tools and parts for the repair.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.

2. Inspect and Replace Spark Plug

• Remove the engine cover if necessary.
• Locate cylinder number 2 spark plug; this may require removing other components for access.
• Use a socket set to unscrew the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace it with a new spark plug that meets OEM specifications (e.g., NGK or Denso).
• Torque the new spark plug to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, proceed to inspect the ignition coil.
• Disconnect the electrical connector from the ignition coil and remove the mounting bolts.
• Replace the ignition coil with a new one, ensuring it is securely attached and properly connected.

4. Inspect Fuel Injector

• If the ignition components are fine, check the fuel injector for cylinder 2.
• Disconnect the fuel injector connector and remove it from the rail.
• Clean the injector using a fuel injector cleaner or replace it if necessary.
• Reconnect the injector and ensure it is seated properly.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses and the intake manifold for any signs of leaks.
• Replace any damaged hoses and ensure all connections are tight.