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

Solution

1. Preparation

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

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, ratchet
• Remove the ignition coil and spark plug from cylinder 1.
  • Use the socket set to remove the bolts securing the coil, then pull the coil out.
  • Use the spark plug socket to remove the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage. Replace if necessary.
• Check the ignition coil for cracks or signs of arcing. Replace if necessary.
• Reinstall the new spark plug to the manufacturer’s torque specifications (typically around 13-15 lb-ft) and the ignition coil.

3. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (optional), fuel line disconnect tool
• Disconnect the fuel line from the fuel injector and remove the injector.
• Inspect the injector for clogs and clean it using a fuel injector cleaning kit if necessary.
• Reinstall the fuel injector, ensuring proper alignment and connection.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail and start the engine.
• Verify that the fuel pressure is within the manufacturer's specifications (usually around 40-50 psi).
• If pressure is low, check the fuel pump and fuel filter for issues and replace if needed.

5. Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1 and insert the compression tester.
• Crank the engine for several seconds and read the compression value.
• Compare the reading to the manufacturer’s specifications (should be around 190-210 psi). If low, further investigation into engine internals may be needed.