how to fix the P0300 code on my Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative terminal of the battery to prevent electrical shocks.

2. Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coils on each affected cylinder:
  1. Unplug the electrical connector from the ignition coil.
  2. Remove the bolt securing the ignition coil and pull it out.
• Use a spark plug socket to remove the old spark plugs.
• Install new spark plugs, ensuring they are gapped correctly (refer to specifications).
• Torque the spark plugs to the manufacturer's specification (typically around 13-15 lb-ft).
• Reinstall ignition coils and reconnect the electrical connectors.

3. Inspect and Replace Ignition Coils (if necessary)

• If any ignition coils were found faulty during diagnostics:
  1. Remove the ignition coil as described earlier.
  2. Install the new ignition coil and secure it with the bolt.
  3. Reconnect the electrical connector.

4. Clean or Replace Fuel Injectors

• If injectors are clogged or malfunctioning:
  1. Remove the fuel rail according to the service manual.
  2. Disconnect the fuel lines with proper safety precautions.
  3. Clean the injectors using a fuel injector cleaning kit or replace them if necessary.
  4. Reassemble the fuel rail and reconnect fuel lines.

5. Check for Vacuum Leaks

• Visually inspect all vacuum hoses connected to the intake manifold.
• Replace any cracked or damaged hoses.
• Use a smoke machine or carburetor cleaner to detect leaks if necessary.