how to fix P0301 misfire code in Honda Pilot Third Generation

Solution

1. Preparation

• Gather tools including an OBD-II scanner, multimeter, spark plug socket, compression tester, and tools for vacuum leak inspection.
• Ensure the vehicle is parked on a level surface with the engine off and cool.

2. Replace Spark Plug

1. Remove Engine Cover (if applicable)

   • Unscrew any bolts holding the engine cover in place and lift it off.

2. Remove Spark Plug

   • Disconnect the ignition coil connector from the spark plug.
   • Use a spark plug socket to carefully unscrew and remove the spark plug from cylinder 1.

3. Install New Spark Plug

   • Apply anti-seize compound to the threads of the new spark plug.
   • Hand-tighten the new spark plug then use a torque wrench to tighten it to the manufacturer’s specified torque (typically around 13 lb-ft).

3. Replace Ignition Coil

1. Remove Ignition Coil

   • After removing the spark plug, unscrew the bolts securing the ignition coil.
   • Carefully pull the ignition coil out of the cylinder head.

2. Install New Ignition Coil

   • Position the new ignition coil and secure it with bolts, ensuring proper alignment.
   • Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector

1. Inspect Fuel Injector

   • Remove the fuel injector by disconnecting its connector and unscrewing the retaining clips or bolts.

2. Clean or Replace

   • If cleaning, use a fuel injector cleaner solution. If it is faulty, install a new fuel injector.
   • Reinstall the fuel injector and reconnect the connector.

5. Reassemble and Test

• Reattach the engine cover and any components that were removed.
• Reconnect the battery if it was disconnected during the procedure.
• Clear the P0301 code using an OBD-II scanner.