how to clear P0301 misfire code on Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaner.
• Ensure the engine is cool, and disconnect the negative battery terminal to prevent electrical shorts and ensure safety.

2. Replace Spark Plug

• Sub-steps:
  1. Locate the spark plug on cylinder 1 (usually the front-left cylinder).
  2. Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
  3. Unscrew the spark plug using a spark plug socket.
  4. Inspect the spark plug condition; replace with a new one if worn or fouled.
  5. Torque the new spark plug to the manufacturer's specification (usually around 13 lb-ft).
  6. Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. Use a multimeter to test the resistance of the ignition coil following the manufacturer's specifications.
  2. If the coil is faulty, remove it and install a new ignition coil.
  3. Reconnect all electrical connectors and ensure secure mounting.

4. Clean or Replace Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector and fuel line (use caution as fuel may spill).
  2. Remove the fuel injector from cylinder 1.
  3. Clean the injector using a fuel injector cleaner or replace it if it is clogged or malfunctioning.
  4. Reinstall the injector and reconnect the fuel line and electrical connector.

5. Compression Test (if misfire persists)

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare the reading to manufacturer's specifications; if low, further diagnosis is needed.