how to fix P0300 code in Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool before starting work.

2. Replace Spark Plugs

• Remove the engine cover if necessary.
• Use a spark plug socket to remove the old spark plugs.
• Inspect the spark plugs for wear; replace with OEM spark plugs (typically NGK or Denso).
• Torque the new spark plugs to manufacturer specifications (usually around 13-15 ft-lbs).
• Reinstall the engine cover if removed.

3. Test and Replace Ignition Coils

• Remove the ignition coil connectors and bolts using a socket.
• Pull the ignition coils out of the cylinder head.
• Test each ignition coil with a multimeter; replace any faulty coils with OEM parts.
• Reinstall the coils and connectors, ensuring they are seated properly.

4. Inspect and Clean Fuel Injectors

• Remove the intake manifold if necessary to access fuel injectors.
• Disconnect fuel lines and electrical connectors from the injectors.
• Remove the fuel injectors using a suitable tool.
• Clean them using a fuel injector cleaning kit or replace them if they are clogged.
• Reinstall the cleaned or new fuel injectors securely.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses, gaskets, and the intake manifold for any signs of leaks.
• Use a smoke machine or carburetor cleaner to detect leaks if necessary.
• Replace any damaged hoses or gaskets.