how do I fix P0301 misfire code in 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 before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 1 by unfastening the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for wear or damage; replace it if necessary.
• Ensure the new spark plug is gapped correctly according to manufacturer specifications.
• Apply a small amount of dielectric grease to the ignition coil boot.
• Reinstall the spark plug and torque it to the manufacturer's specifications (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, check the ignition coil for signs of damage or corrosion.
• Tools Required: Socket set, multimeter (for testing).
• Test the ignition coil with a multimeter to ensure it operates within specifications.
• If faulty, replace the ignition coil with a new one.
• Reinstall the ignition coil, ensuring it is seated correctly and secured.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector for cylinder 1 if misfire persists.
• Tools Required: Fuel injector removal tool, cleaning solvent.
• Clean the injector using cleaning solvent or replace it if clogged.
• Reinstall the fuel injector ensuring proper sealing.