how to fix P0301 misfire code on my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Use a spark plug socket to remove the old spark plug.
• Inspect the spark plug gap and replace with a new spark plug if worn or damaged.
• Torque the new spark plug to manufacturer specifications (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil appears damaged or failing, remove it from cylinder 1.
• Install a new ignition coil, ensuring it is properly seated.
• Torque to manufacturer specifications.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit, safety goggles.
• Remove the fuel injector from cylinder 1 carefully.
• Use a fuel injector cleaning kit to clean the injector.
• Reinstall the cleaned or new injector, ensuring proper sealing.

5. Compression Test (if necessary)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1 and insert the compression tester.
• Crank the engine and read the compression value.
• If the compression is low, further investigation into internal engine issues may be necessary.