how do I fix P0302 misfire code in my Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 2.
• Using a spark plug socket, remove the spark plug.
• Inspect the spark plug for wear or damage (carbon buildup, excessive gap).
• If defective, replace with a new spark plug according to manufacturer specifications.
• Torque the new spark plug to the manufacturer’s recommended settings (typically around 13-15 ft-lbs).

3. Check and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove the ignition coil by unscrewing the mounting bolt.
• Inspect the coil for cracks or damage.
• Replace with a new ignition coil if necessary.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check for continuity and proper resistance (should be within the manufacturer's specifications).
• If the injector is faulty, remove and replace it.
• Reconnect the fuel injector connector after installation.

5. Perform Compression Test

• Remove the spark plug for cylinder 2 and adjacent cylinders.
• Insert a compression gauge into cylinder 2.
• Crank the engine to take the reading.
• Compare the reading to manufacturer specifications (typically 180-200 psi).
• If compression is low, further investigation into head gasket or valve issues may be required.