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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 1.
• Unbolt the ignition coil and remove it.
• Inspect the spark plug; if worn or fouled, replace it with a new one (OEM recommended).
• Apply dielectric grease to the ignition coil boot before reinstalling.
• Reinstall the ignition coil and connect the connector.

3. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, small brush, safety glasses.
• Remove the fuel rail assembly if necessary to access cylinder 1's injector.
• Use a fuel injector cleaner to clean the injector nozzle.
• Check for proper operation by performing a resistance test on the injector using a multimeter (consult specifications for resistance values).
• Reinstall the injector and fuel rail assembly.

4. Perform Compression Test

• Tools Required: Compression tester.
• Remove spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine and note the compression reading. It should fall within manufacturer specifications.
• If compression is low, further investigation into the piston rings, valves, or head gasket may be required.

5. Test Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail service port and attach the fuel pressure gauge.
• Turn the ignition key to the "ON" position without starting the engine to check the fuel pressure.
• Compare the reading with the manufacturer's recommended fuel pressure specifications. If low, inspect the fuel pump and filter for issues.