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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, fuel injector cleaner.
• Gather all necessary tools and parts before starting the repair.

2. Inspect and Replace Spark Plug

• Sub-steps:
  • Disconnect the negative battery terminal.
  • Remove the ignition coil from cylinder 1.
  • Remove the spark plug using a spark plug socket.
  • Inspect the spark plug for wear, carbon buildup, or damage.
  • Replace the spark plug with a new one if necessary; torque to manufacturer specifications (typically around 13 lb-ft).
  • Reinstall the ignition coil and reconnect the battery terminal.

3. Test and Replace Ignition Coil

• Sub-steps:
  • If the spark plug is fine, test the ignition coil using an ohmmeter; check primary and secondary resistance.
  • If out of specifications, replace the ignition coil.
  • Install the new ignition coil and reconnect all connectors.

4. Clean or Replace Fuel Injector

• Sub-steps:
  • If the ignition coil is functional, remove the fuel injector from cylinder 1.
  • Inspect the injector for clogs or damage; clean using a fuel injector cleaner or replace if necessary.
  • Reinstall the fuel injector and ensure all connections are secure.

5. Compression Test

• Sub-steps:
  • Remove the fuel pump relay to prevent fuel delivery during testing.
  • Remove the spark plugs from all cylinders.
  • Insert the compression tester into cylinder 1 and crank the engine.
  • Note the reading; it should be within manufacturer specifications (typically 180-210 psi).
  • If compression is low, further investigate for internal engine issues (valves, piston rings).