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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, basic hand tools.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate cylinder 1 spark plug (usually the front left).
  3. Use a socket wrench to remove the spark plug.
  4. Inspect the spark plug for fouling or excessive wear. Replace if necessary.
  5. Install a new spark plug using the manufacturer-recommended torque specification (usually around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the ignition coil connector.
  2. Remove the ignition coil retaining bolt.
  3. Pull the ignition coil out of the spark plug tube.
  4. Inspect the ignition coil for cracks or corrosion. Replace if faulty.
  5. Reinstall the new ignition coil, ensuring it seats properly, and reconnect the electrical connector.

4. Check and Replace Fuel Injector (if needed)

• Sub-steps:
  1. Disconnect the fuel injector connector.
  2. Remove the fuel rail bolts and carefully lift the fuel rail with the injector attached.
  3. Remove the injector from the rail and inspect for clogs or damage. Replace if defective.
  4. Reinstall the injector into the fuel rail, ensuring proper seating.
  5. Reattach the fuel rail and reconnect the fuel injector connector.

5. Perform a Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine for a few seconds and record the compression reading.
  4. Compare the reading to the manufacturer specifications (typically around 180-220 psi). If low, further investigation is required.