how to fix the P0301 misfire code on my Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Gather the necessary tools and parts.
• Ensure the engine is off and cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil by unbolting it and disconnecting the electrical connector.
• Use a spark plug socket to remove the old spark plug from cylinder 1.
• Inspect the spark plug gap and replace it with a new spark plug (recommended gap: 0.043 inches).
• Torque the new spark plug to 13 lb-ft.

3. Replace Ignition Coil

• Tools Required: Socket set
• Remove the ignition coil bracket if applicable.
• Unplug the ignition coil connector and unbolt the coil.
• Install the new ignition coil onto cylinder 1 and secure it with bolts.
• Reconnect the ignition coil connector.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (if necessary), basic hand tools
• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel rail if necessary to access the injector.
• Clean the injector using a fuel injector cleaning kit or replace it if it is defective.
• Reassemble the fuel rail and reconnect the injector.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Monitor for any check engine light re-illuminating.