how to fix P0301 misfire code on Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool completely before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Sub-steps:
  1. Remove the ignition coil from cylinder 1 by unscrewing any retaining bolts and gently pulling it out.
  2. Use the spark plug socket to remove the spark plug from cylinder 1.
  3. Inspect the spark plug for signs of wear or fouling; replace it with a new one if necessary.
  4. Torque the new spark plug to the manufacturer's specification (typically around 13 ft-lbs).
  5. Reinstall the ignition coil.

3. Replace Ignition Coil (if needed)

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. If the ignition coil shows signs of damage, remove it from the spark plug.
  2. Disconnect the electrical connector from the ignition coil.
  3. Remove any mounting bolts holding the coil in place.
  4. Install the new ignition coil, tightening to manufacturer specifications.
  5. Reconnect the electrical connector to the ignition coil.

4. Check Fuel Injector

• Tools Required: Fuel injector tester or multimeter.
• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a multimeter to check for proper resistance according to specifications.
  3. If the injector is faulty, replace it by removing it from the fuel rail.
  4. Install the new injector and reconnect the electrical connector.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach normal operating temperature.
• Check for any check engine light illumination and ensure smooth engine operation.