how to fix P0302 misfire in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool completely before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil cover if applicable.
• Unplug the ignition coil connector for cylinder 2.
• Remove the ignition coil from cylinder 2 using the socket set.
• Remove the spark plug from cylinder 2 with the spark plug socket.
• Inspect the spark plug for wear; replace if damaged or fouled.
• Install a new spark plug, applying dielectric grease to the threads. Torque to the manufacturer’s specification (typically around 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set.
• If the ignition coil was found faulty in the diagnostic steps, remove the coil as described above.
• Install a new ignition coil for cylinder 2.
• Ensure proper seating and reconnect the electrical connector.

4. Check and Clean/Replace Fuel Injector

• Tools Required: Socket set, fuel injector puller (if necessary).
• Disconnect the fuel injector electrical connector for cylinder 2.
• Remove the fuel rail if required to access the injector.
• Inspect the fuel injector for obstructions; clean it using an appropriate fuel injector cleaner.
• If cleaning is not effective, replace the fuel injector with a new one.
• Reassemble the fuel rail and reconnect all electrical connectors.

5. Compression Test (If Necessary)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Screw in the compression tester and crank the engine for a few seconds.
• Record the compression reading and compare it to manufacturer specifications (usually around 180-200 psi).
• If the compression is low, investigate further for possible internal engine issues.