how to fix P0300 misfire code in my Honda CR-V Sixth Generation (2023-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if applicable.
• Using the spark plug socket, remove the old spark plugs.
• Inspect the gaps of the new spark plugs; adjust to manufacturer specifications.
• Install new spark plugs by hand to avoid cross-threading, then torque to manufacturer specifications (typically around 13 lb-ft).

3. Check and Replace Ignition Coils

• Tools Required: Socket set, multimeter (for testing)
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil using the socket set.
• Test the ignition coil with a multimeter for proper resistance; replace if out of specification.
• Install the new coil and reconnect the electrical connector.

4. Inspect and Replace Fuel Injectors

• Tools Required: Fuel injector puller (if needed), basic socket set
• Disconnect the fuel pump fuse and run the engine until it stalls to relieve fuel pressure.
• Remove the fuel rail bolts and gently pull the fuel rail with injectors away from the engine.
• Replace any faulty injectors with new ones, ensuring proper seating and connection.
• Reinstall the fuel rail and bolt it securely.

5. Vacuum Leak Inspection

• Tools Required: Smoke machine (for leak detection) or carburetor cleaner
• Visually inspect all vacuum lines for cracks or disconnections.
• If using a smoke machine, introduce smoke into the intake system and look for leaks.
• Repair or replace any damaged vacuum lines.