how to fix P0301 misfire code on Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the engine cover (if applicable) by unscrewing bolts.
• Using the spark plug socket, remove the spark plug from cylinder 1.
• Inspect the old spark plug for wear or deposits; replace if necessary.
• Install the new spark plug and torque it to the manufacturer’s specification (typically around 13 lb-ft).
• Reattach the engine cover.

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the ignition coil by unscrewing the retaining bolts.
• Inspect the ignition coil for damage or wear.
• Replace with a new ignition coil if necessary, and torque to manufacturer specifications.
• Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, socket set
• Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel injector connector and remove the retaining clip.
• Pull out the fuel injector from the fuel rail.
• Inspect the injector for clogs or damage; replace if necessary.
• Install the new fuel injector, ensuring a proper seal, and reattach the connector.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove spark plug from cylinder 1 for testing.
• Insert the compression tester into the spark plug hole.
• Crank the engine several times and record the compression reading.
• Compare the result with manufacturer specifications; if low, further investigation may be needed.