how to fix Honda Accord 8th Generation (2008-2012) P0302 misfire code

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Remove the spark plug wire or ignition coil from cylinder 2.
• Use a spark plug socket to remove the spark plug. Inspect for wear or damage.
• Replace with a new spark plug (manufacturer specifications: NGK or Denso recommended).
• Torque the new spark plug to 13-16 lb-ft (17-22 Nm) using a torque wrench.

3. Check and Replace Ignition Coil

• If the spark plug is fine, check the ignition coil for cylinder 2.
• Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Test the ignition coil with a multimeter for resistance (consult specifications).
• Replace the ignition coil if it is faulty.

4. Inspect and Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check for proper voltage and resistance.
• If faulty, remove the fuel rail to access the injector.
• Replace the fuel injector with a new one, ensuring it is properly seated.

5. Compression Test

• Remove the spark plugs from all cylinders for accurate testing.
• Use a compression gauge to test cylinder 2. Compare readings with manufacturer specifications (usually 190-210 psi).
• If compression is low, further investigation may be needed (e.g., valve issues or head gasket).