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

Solution

1. Preparation

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

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Use a socket wrench to remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear (e.g., carbon buildup, broken insulator).
• Install a new spark plug, ensuring it is gapped correctly (consult specifications for gap size).
• Torque the spark plug to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Replace Ignition Coil

• Disconnect the wiring harness from the ignition coil on cylinder 1.
• Remove the bolts securing the ignition coil and pull the coil out.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the wiring harness to the ignition coil.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector on cylinder 1.
• Remove the fuel rail if necessary to access the injector.
• Use a fuel injector cleaner and follow the manufacturer’s instructions for cleaning.
• Reinstall the injector and ensure it is seated correctly in the fuel rail.

5. Reassemble and Test

• Reattach the engine cover if removed.
• Reconnect the negative battery terminal.
• Start the engine and allow it to run to check for any misfire issues.