how to solve the P0301 code misfire in my Honda Accord 10th Generation (2018-2022)?

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Tools: Socket set, ratchet, extension
  • Remove the bolts securing the coil and gently pull it out.
• Remove the spark plug from cylinder 1:
  • Tools: Spark plug socket
  • Carefully unscrew the spark plug and inspect it for wear or damage.
• Install a new spark plug:
  • Use a torque wrench to tighten the new spark plug to the manufacturer's specification (typically 13-16 lb-ft).
• Reinstall the ignition coil and ensure it is securely fastened.

3. Inspect and Replace Ignition Coil (if necessary)

• If the spark plug is fine, test the ignition coil for proper resistance using a multimeter:
  • Tools: Multimeter
  • Compare the readings to the specifications in the service manual.
• If the coil is faulty, replace it with a new one:
  • Install the new coil in reverse order of removal.

4. Fuel Injector Inspection and Cleaning

• Remove the fuel rail assembly to access the fuel injector for cylinder 1:
  • Tools: Socket set, fuel line removal tool
• Inspect the fuel injector for clogging or damage.
• Clean the fuel injector using a fuel injector cleaning kit or replace it if necessary.
• Reinstall the fuel rail and ensure all connections are secure.

5. Compression Test (if misfire persists)

• Conduct a compression test on cylinder 1:
  • Tools: Compression tester
  • Compare the results to the manufacturer's specifications (typically around 180 psi).
• If compression is low, investigate internal engine issues such as valve problems or piston ring wear.