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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent any electrical shorts during the repair process.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil harness from the spark plug.
• Use a socket wrench to remove the old spark plug.
• Inspect the spark plug gap and replace it with a new spark plug if necessary.
• Torque the new spark plug to the manufacturer's specifications (typically around 13 lb-ft).
• Reconnect the ignition coil.

3. Inspect/Replace Ignition Coil

• Tools Required: Socket set, multimeter (for testing).
• Remove the ignition coil from cylinder 1.
• Use a multimeter to test the coil's primary and secondary resistance according to specifications.
• If the ignition coil is faulty, replace it with a new one.
• Reinstall the ignition coil and reconnect the harness.

4. Check Fuel Injector

• Tools Required: Fuel injector testing kit (or multimeter).
• Remove the fuel injector from cylinder 1.
• Use the fuel injector testing kit to check for proper spray pattern and operation.
• Clean or replace the fuel injector as necessary.
• Reinstall the fuel injector and ensure it is properly seated.

5. Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1.
• Insert the compression gauge into the spark plug hole.
• Crank the engine to take the compression reading.
• If the compression is low, further investigation into engine internals may be required.