how to fix P0301 code on my Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the work area is clean and organized.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1.
• Unscrew and remove the old spark plug using a spark plug socket.
• Inspect the spark plug's gap and condition. Replace with a new spark plug if needed.
• Install the new spark plug and torque to the manufacturer's specifications (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Reconnect the ignition coil connector.
• Remove the ignition coil from cylinder 1.
• Install a new ignition coil if the old one shows signs of failure (cracks, corrosion).
• Ensure the new coil is seated properly and reconnect the wiring harness.

4. Check and Replace Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel rail (if necessary) to access the injector.
• Replace the fuel injector if it is not functioning properly (leaks or blockage).
• Reinstall the fuel rail and reconnect the injector connector.

5. Final Assembly

• Reconnect the battery.
• Start the engine and check for any misfire codes or issues.