how to fix the P0301 error code on Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal.
• Allow the engine to cool completely to avoid burns.

2. Replace Spark Plug

• Sub-steps:
  • Remove the ignition coil cover (if applicable) by unscrewing any fasteners.
  • Disconnect the electrical connector from the ignition coil for cylinder 1.
  • Remove the ignition coil by unscrewing it from the cylinder head.
  • Remove the old spark plug using a spark plug socket.
  • Inspect the spark plug hole for debris and clean if necessary.
  • Install a new spark plug, ensuring the gap is set to manufacturer specifications (typically 0.044 inches for Honda).
  • Torque the spark plug to the manufacturer’s specification (usually around 13 lb-ft).
  • Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  • If faulty, remove the ignition coil as described above.
  • Install the new ignition coil, ensuring it is properly seated.
  • Reconnect the electrical connector and torque any fasteners to the manufacturer's specifications.

4. Inspect and Clean Fuel Injector (if needed)

• Sub-steps:
  • Use a fuel injector cleaning kit or replace the injector if it’s clogged.
  • Disconnect the fuel line and electrical connector from the injector.
  • Remove the fuel injector from the intake manifold.
  • Clean the injector using an ultrasonic cleaner or replace it with a new unit.
  • Reinstall the injector, reconnect the fuel line, and electrical connector.

5. Final Check

• Reconnect the negative battery terminal.
• Start the engine and check for smooth operation and absence of misfires.