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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector.
• Unbolt and remove the ignition coil from cylinder 1.
• Remove the old spark plug using the spark plug socket.
• Inspect the spark plug gap and adjust if necessary; replace with a new spark plug.
• Apply dielectric grease to the ignition coil boot and reassemble.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil is damaged, remove it as outlined above.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector cleaning kit or replacement injector.
• If the injector is clogged, use a fuel injector cleaning kit according to the manufacturer's instructions.
• If replacing, disconnect the fuel line and electrical connector, then remove the injector.
• Install the new injector and reconnect all components.

5. Verify and Reassemble

• Reconnect the battery.
• Start the engine and check for any error codes.
• Ensure all components are securely fastened and the engine runs smoothly.