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

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Gather necessary tools and parts.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, gap gauge.
• Remove the ignition coil cover if necessary.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear; replace it if it is worn or fouled.
• Set the gap on the new spark plug according to manufacturer specifications.
• Install the new spark plug and torque it to the recommended value (typically 13-16 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Ratchet and socket set.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil from cylinder 1.
• Inspect the coil for cracks or damage; replace if necessary.
• Install the new ignition coil and reconnect the electrical connector.

4. Inspect Fuel Injector

• Tools Required: Multimeter or noid light.
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check for resistance; compare the reading with specifications.
• If the injector is faulty, remove it using appropriate tools.
• Install a new fuel injector, ensuring proper sealing and connection.

5. Perform 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 and record the compression reading; compare with manufacturer specifications.
• If compression is low, further investigation may be required (valve issues, piston problems).