how to fix the check engine light with P0300 code on my Toyota Camry Eighth Generation (2018-present...

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coils from the electrical connectors.
• Remove the bolts holding the ignition coils and carefully pull them out.
• Check the spark plugs for wear; replace if necessary.
• Install new spark plugs (torque to manufacturer specifications, typically around 13-16 ft-lbs).
• Reinstall ignition coils and reconnect electrical connectors.

3. Check and Repair Vacuum Leaks

• Tools Required: Vacuum gauge or smoke machine, hose clamps.
• Inspect vacuum hoses visually for cracks or disconnections.
• Use a smoke machine or vacuum gauge to identify any leaks in the intake system.
• Repair or replace any damaged hoses or gaskets.

4. Test and Replace Fuel System Components

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "on" position (do not start the engine) and check the fuel pressure; it should meet manufacturer specifications.
• If pressure is low, check the fuel pump, filter, and fuel lines for clogs or damage.
• Replace any faulty components as needed.

5. Conduct Compression Test (if necessary)

• Tools Required: Compression tester.
• Remove the spark plugs to access cylinder chambers.
• Insert the compression tester into the spark plug hole of each cylinder and crank the engine.
• Record the compression readings; they should be within the manufacturer's specified range.
• Reassemble everything after testing.