how to fix P0301 misfire code in Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather tools and parts needed: OBD-II scanner, socket set, torque wrench, compression tester, spark plug socket, and new spark plugs and ignition coil (if necessary).
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Locate the spark plug for cylinder 1 (usually at the front of the engine).
3. Use a spark plug socket to remove the spark plug.
4. Inspect the spark plug for wear (electrode condition, carbon buildup).
5. If damaged or worn, replace with the manufacturer-recommended spark plug and torque it to the specified value (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

1. Disconnect the wiring harness from the ignition coil for cylinder 1.
2. Remove the ignition coil mounting bolts using the socket set.
3. Carefully pull out the ignition coil.
4. Inspect for cracks or carbon tracking. If defective, replace with a new ignition coil.
5. Install the new ignition coil and torque to manufacturer specifications.
6. Reconnect the wiring harness.

4. Check and Clean Fuel Injector

1. Remove the fuel rail (if necessary) to access the fuel injector for cylinder 1.
2. Disconnect the fuel line and the electrical connector from the injector.
3. Remove the fuel injector and inspect it for clogs or leaks.
4. Clean the injector using an appropriate fuel injector cleaner or replace it if necessary.
5. Reinstall the injector, ensuring proper seating, and reconnect all lines.

5. Compression Test

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's specifications. If low, further investigation into mechanical issues may be required.