my Toyota Camry has a check engine light and code P0302, what does this mean?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 2.
  • Disconnect the electrical connector.
  • Unbolt the coil and gently pull it out.
• Remove the spark plug from cylinder 2.
  • Use a spark plug socket to unscrew the spark plug.
• Inspect the spark plug for wear; replace it if necessary.
  • Check for correct gap using a spark plug gap tool.
  • Apply dielectric grease to the spark plug threads before installation.
• Install the new or inspected spark plug and torque it to manufacturer specifications (typically 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, proceed to the ignition coil.
• Replace the ignition coil if it shows signs of damage or malfunction.
  • Reinstall the ignition coil, ensuring it clicks into place and reconnect the electrical connector.

4. Check Fuel Injector

• If misfire persists, check the fuel injector for cylinder 2.
• Remove the fuel injector connector and inspect for damage.
• Use a multimeter to check for proper resistance and operation.
  • If faulty, replace the injector with a new one.
• Reassemble the injector and connector.

5. Final Assembly

• Reconnect the negative battery terminal.
• Start the engine and let it idle, checking for any irregularities.