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

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2 by unscrewing the bolts.
• Carefully pull out the spark plug using a spark plug socket.
• Inspect the old spark plug for wear, and replace it with a new one. Torque to manufacturer specifications (typically around 13-16 lb-ft).
• Reinstall the ignition coil.

3. Inspect and Replace Ignition Coil (if needed)

• Tools Required: Socket set, multimeter.
• Use a multimeter to check the resistance of the ignition coil; compare with manufacturer specifications.
• If the coil is faulty, remove it and install a new ignition coil, ensuring it is properly seated and secured.

4. Test Fuel Injector

• Tools Required: Noid light or multimeter.
• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check if the injector is receiving a signal. If not, trace the wiring back to the ECU.
• If the injector is faulty, replace it with a new one, ensuring all connections are secure.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2 and install the compression tester.
• Crank the engine and record the compression reading. Compare with manufacturer specifications (typically around 180-200 psi).
• If compression is low, further investigation is needed for potential internal engine issues.