how to fix the P0301 misfire code on my Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool down before proceeding.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Using a spark plug socket, remove the old spark plug.
• Inspect the spark plug for damage and ensure it is properly gapped according to specifications (typically around 0.043 inches for Toyota).
• Install the new spark plug, tightening it to the manufacturer’s torque specification (usually around 13 lb-ft).
• Reinstall the ignition coil.

3. Replace Ignition Coil (if necessary)

• If the ignition coil is found to be faulty during inspection, remove it as described in the previous step.
• Install the new ignition coil, ensuring it is properly seated and fastened securely.

4. Inspect and Clean Fuel Injector (if necessary)

• If issues with fuel delivery are suspected, remove the fuel injector from cylinder 1.
• Clean the fuel injector using an appropriate cleaning solution or replace it with a new one.
• Reinstall the cleaned or new fuel injector, ensuring all seals are intact.

5. Final Check

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.