how to fix P0301 misfire code in my Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool
• Remove the ignition coil by unscrewing the mounting bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for signs of wear, such as carbon buildup or damage.
• Replace with a new spark plug, ensuring the gap is set according to manufacturer specifications (typically around 0.044 inches for Honda).
• Torque the spark plug to the specified value (approximately 13 lb-ft).

3. Test and Replace Ignition Coil

• Tools Required: Multimeter
• Check the resistance of the ignition coil using the multimeter according to Honda specifications (values typically around 0.5 - 0.8 ohms).
• If out of spec, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Check Fuel Injector

• Tools Required: Fuel injector cleaning kit or replacement fuel injector
• Remove the fuel rail if necessary to access the injector.
• Inspect the fuel injector for any clogs or damage.
• Clean the injector using a cleaning kit or replace with a new fuel injector if cleaning is ineffective.

5. Reassemble and Reconnect

• Reinstall any components removed during the repair (intake manifold, fuel rail, etc.).
• Reconnect the negative battery terminal.
• Clear the trouble codes using the OBD-II scanner.