how to fix P0302 misfire code on Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before working on components.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil from cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the old spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage; if worn, replace it with a new one, ensuring it matches manufacturer specifications.
• Torque the new spark plug to the manufacturer’s recommended specifications (typically around 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil was damaged or not functioning properly, remove it from cylinder 2.
• Install the new ignition coil, ensuring it is seated correctly.
• Torque the ignition coil bolts to the manufacturer’s specifications.

4. Check and Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, socket set.
• Disconnect the fuel line and electrical connector from the fuel injector in cylinder 2.
• Remove the fuel injector using the removal tool; inspect for clogs or faults.
• If faulty, replace the fuel injector with a new one, ensuring proper seating and connections.

5. Perform Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 2 and insert the compression gauge.
• Crank the engine to obtain a compression reading; compare to manufacturer specifications (typically 180 psi or higher).
• If compression is low, further investigation into cylinder head or piston issues may be necessary.