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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the engine cover (if applicable).
• Disconnect the ignition coil connector and remove the ignition coil from Cylinder 1.
• Remove the old spark plug using a socket.
• Inspect the spark plug for wear or fouling; replace it with a new OEM or equivalent spark plug, ensuring correct gap specification (usually around 0.043 inches).
• Reinstall the ignition coil and connector.

3. Inspect and Replace Ignition Coil (if needed)

• If the ignition coil appears damaged or if the misfire persists after changing the spark plug, replace the ignition coil for Cylinder 1.
• Tools Required: Socket set.
• Remove the ignition coil from Cylinder 1 and install the new coil.
• Reconnect the ignition coil connector.

4. Check and Replace Fuel Injector (if needed)

• If the problem remains, test the fuel injector for Cylinder 1.
• Tools Required: Noid light or multimeter.
• If the injector is not firing, replace it with a new OEM fuel injector.
• Reinstall any components removed to access the fuel injector.

5. Perform Compression Test

• If misfire persists after replacing spark plugs, ignition coil, and fuel injector, conduct a compression test on Cylinder 1.
• Tools Required: Compression gauge.
• Remove spark plug and attach the compression gauge.
• Crank the engine and record the compression reading. Compare it with the manufacturer's specifications.
• If compression is low, further investigation into internal engine issues may be required (e.g., valve problems, head gasket failure).