how to fix P0301 misfire code in Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1:
  • Unscrew the bolts securing the ignition coil.
  • Disconnect the electrical connector.
• Remove the spark plug:
  • Use the spark plug socket to unscrew the spark plug.
  • Inspect the old spark plug for wear or damage.
• Install the new spark plug:
  • Apply a small amount of anti-seize compound to the threads (if required).
  • Torque the new spark plug to the manufacturer’s specifications (typically around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Check the ignition coil resistance with a multimeter:
  • If the readings are out of spec, replace the ignition coil.
• Install the new ignition coil:
  • Reconnect the electrical connector.
  • Secure the ignition coil with the bolts.

4. Check and Clean Fuel Injector

• Inspect the fuel injector for clogs:
  • Remove the fuel injector from cylinder 1.
  • Use a fuel injector cleaning kit or professional cleaning service if necessary.
• Reinstall the fuel injector, ensuring it is seated properly.

5. Perform Compression Test

• Use a compression gauge to check cylinder 1:
  • If compression is low, further diagnostics are needed to determine the cause (e.g., valve issues, gasket failure).