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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Replace Spark Plugs

• Remove the engine cover if applicable.
• Use a socket wrench to remove the spark plugs.
• Inspect and replace spark plugs with OEM or equivalent parts.
  • Torque specification: 13 ft-lbs (17.6 Nm) for spark plugs.
• Reinstall the engine cover.

3. Check/Replace Ignition Coils

• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil by unbolting it and lifting it out of the spark plug well.
• Inspect for any cracks or damage.
• Replace with new ignition coils if necessary, ensuring they are securely seated and connected.

4. Inspect/Replace Fuel Injectors

• Remove the fuel rail by unbolting it while ensuring the fuel system is depressurized.
• Inspect the fuel injectors for clogs; clean or replace them if necessary.
• Reinstall the fuel rail and ensure all connections are secure.

5. Repair Vacuum Leaks

• Inspect all vacuum hoses and intake manifold for cracks or disconnections.
• Replace any damaged hoses or reseal the intake manifold if necessary.

6. Verify Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (without starting) and check the pressure.
• Compare the reading with manufacturer specifications; replace the fuel pump if pressure is low.