how to fix P0301 misfire code in my Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts.
• Disconnect the electrical connector from the ignition coil.
• Remove the old spark plug using a spark plug socket.
• Install the new spark plug and torque it to the manufacturer’s specification (typically around 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• If the ignition coil shows signs of damage or wear, remove it as described above.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the electrical connector.

4. Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, socket set.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel lines and electrical connector from the fuel injector.
• Remove the fuel injector from the rail using the appropriate tool.
• Install the new injector with new O-rings and reconnect lines and electrical connectors.

5. Verify Repairs

• Reconnect the negative battery terminal.
• Start the engine and check for any error codes using the OBD-II scanner.
• Test drive the vehicle to ensure smooth operation and monitor for any symptoms.