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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shock.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap gauge
• Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
• Using a socket, remove the spark plug from cylinder 1.
• Inspect the spark plug gap and adjust it to the manufacturer’s specification if needed (typically around 0.044 inches for Honda).
• Install the new spark plug and torque it to the manufacturer's specifications (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• Test the ignition coil with a multimeter to check for resistance within specifications.
• If faulty, remove the ignition coil and replace it with a new one.
• Reconnect the electrical connector and secure the ignition coil.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaner kit or replacement injector
• If the injector is clogged, use a fuel injector cleaning kit to clean it.
• If the injector is faulty, remove it using the appropriate socket and replace it with a new injector.
• Reattach any fuel lines and connectors securely.

5. Conduct Compression Test

• Tools Required: Compression gauge
• Remove the spark plug from cylinder 1 and insert the compression gauge.
• Crank the engine and observe the compression reading; it should meet manufacturer specifications (around 190-210 psi).
• If compression is low, further diagnosis of internal engine components may be necessary.