how to fix P0301 misfire code in Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, socket set, torque wrench, compression tester, spark plug socket, and replacement parts as needed.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Unscrew the bolts holding the coil using a socket wrench.
  • Gently pull the coil out of the spark plug well.
• Remove the spark plug:
  • Use a spark plug socket to unscrew the spark plug from the cylinder head.
  • Inspect the spark plug for wear or fouling. If damaged, replace it with a new one (use OEM specifications for gap).
• Reinstall the new spark plug:
  • Hand-tighten the spark plug, then torque it to the manufacturer’s specifications (typically around 13 lb-ft).
• Reinstall the ignition coil:
  • Ensure it is seated properly, then secure it with bolts and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil is found to be faulty during inspection:
  • Remove the coil as described above.
  • Install the new ignition coil by reversing the removal steps.

4. Perform Compression Test (if necessary)

• If the spark plug and ignition coil are fine, perform a compression test:
  • Remove the spark plug from cylinder 1.
  • Insert the compression tester into the spark plug hole.
  • Crank the engine and read the compression value. Compare it to manufacturer specifications (typically 180-200 psi).
• If compression is low, further investigation into internal engine components may be necessary.