how to fix P0301 misfire code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1 using a socket set.
• Extract the spark plug using a spark plug socket.
  • Tools Required: Spark plug socket, ratchet, torque wrench.
• Inspect the spark plug for wear or fouling. If damaged, replace with a new spark plug.
  • Torque Specification: 13 lb-ft (18 Nm) when installing the new spark plug.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, visually inspect the ignition coil for cracks or damage.
• Replace the ignition coil if any damage is noted.
  • Tools Required: Socket set.
• Reinstall the ignition coil and ensure it is seated properly.

4. Inspect and Clean Fuel Injector

• Remove the fuel rail to access the fuel injector for cylinder 1.
  • Tools Required: Socket set, fuel line disconnect tool.
• Inspect the injector for clogs or leaks. Clean or replace the injector as necessary.
• Reinstall the fuel rail and ensure all connections are secure.

5. Recheck Compression

• If misfire persists, conduct a compression test on cylinder 1.
  • Tools Required: Compression tester.
• If compression is low, investigate further for potential internal engine issues (e.g., blown head gasket, worn piston rings).