how to fix P0302 code in my Honda Civic 9th Generation (2012-2015)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery cable to prevent electrical shorts.
• Ensure the engine is cool before working to avoid burns.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the engine cover (if applicable).
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 2.
• Remove the spark plug from cylinder 2 using a socket wrench.
• Inspect the spark plug for wear or fouling; replace it if necessary.
• Check the spark plug gap and adjust to manufacturer specifications (0.044 inches for most Honda models).
• Install the new or cleaned spark plug and torque to 13 lb-ft (18 Nm).
• Reinstall the ignition coil and reconnect the connector.

3. Check and Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• If the ignition coil shows signs of damage or malfunction during inspection, replace it.
• Remove the faulty ignition coil and install the new one, ensuring it is seated correctly.
• Reconnect the ignition coil connector.

4. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Socket set, fuel injector puller (if necessary).
• If the fuel injector is faulty, remove it carefully from the fuel rail.
• Install the new fuel injector, ensuring proper seating and connection.
• Reattach any necessary wiring and ensure there are no leaks after installation.

5. Clear Codes and Test Drive

• Reconnect the negative battery cable.
• Start the engine and use the OBD-II scanner to clear the P0302 code.
• Take the vehicle for a test drive to ensure the misfire has been resolved.