how can I fix the P0300 code in my Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery (negative terminal).
• Ensure the vehicle is on a flat surface and securely lifted if necessary.

2. Inspect and Replace Spark Plugs

• Remove the ignition coil covers (if applicable) using a socket set.
• Disconnect the electrical connectors from each ignition coil.
• Remove the ignition coils using a socket wrench.
• Remove the spark plugs with a spark plug socket.
• Inspect spark plugs for wear; replace with OEM parts if necessary (specification: NGK or Denso, gap: 0.043 in).
• Reinstall the spark plugs and torque to the manufacturer's specification (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coils

• Check each ignition coil for cracks or carbon tracking.
• Replace any faulty ignition coils with OEM parts.
• Reinstall ignition coils and ensure they are seated correctly.

4. Fuel System Inspection

• Use a fuel pressure gauge to check fuel pressure against specifications (typically 40-50 psi for Camry).
• Inspect fuel injectors for clogs; clean or replace as necessary.
• Ensure the fuel filter is not clogged; replace if needed.

5. Vacuum Leak Inspection

• Visually inspect all vacuum hoses and the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to identify leaks during idle.
• Repair or replace any damaged hoses or gaskets.

6. Compression Test

• Remove all spark plugs to perform a compression test.
• Use a compression tester and crank the engine; record the readings for each cylinder.
• Compare readings; if any are significantly lower than others, further investigation is required (possible head gasket issue or valve problems).