how to fix the P0301 misfire code on my Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

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

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 1 (typically the front left on a 4-cylinder engine).
• Use a spark plug socket and ratchet to remove the spark plug.
• Inspect the old spark plug for wear; if it appears damaged, replace it.
• Install the new spark plug and torque it to the manufacturer's specification (typically 13-16 lb-ft).
• Reconnect any components removed to access the spark plug.

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil from cylinder 1 using the appropriate socket.
• If faulty, install a new ignition coil. Ensure it is seated properly and reconnect the electrical connector.

4. Check and Clean Fuel Injector

• Remove the fuel injector connector from cylinder 1.
• Use a fuel injector cleaning kit and follow the manufacturer's instructions to clean the injector.
• Reinstall the cleaned or new fuel injector in cylinder 1 and reconnect the electrical connector.

5. Compression Test (if necessary)

• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine for a few seconds, then read the compression value.
• If compression is low, further engine diagnosis may be necessary.