how to fix P0301 misfire code on Honda CR-V Sixth Generation (2023-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool completely before proceeding.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket. Inspect for signs of wear or damage (e.g., excessive carbon buildup, wear on the electrode).
• If damaged, replace with a new spark plug. Torque to the manufacturer's specifications (typically around 13-15 ft-lbs).

3. Test and Replace Ignition Coil

• Use a multimeter to check the resistance of the ignition coil. Compare with manufacturer specifications (usually around 0.5 to 0.8 ohms for primary resistance).
• If the coil is faulty, replace it with a new one, ensuring proper seating and connection.

4. Compression Test

• Reinstall the spark plug and ignition coil.
• Use a compression tester to assess cylinder pressure. If the reading is below specifications (typically around 180 psi), further investigation into internal engine issues may be necessary.

5. Inspect Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Use a noid light or multimeter to test the injector's electrical signal.
• If the injector is not functioning, replace it with a new one.

6. Check for Vacuum Leaks

• Inspect hoses and gaskets around the intake manifold for any signs of damage or wear.
• Spray a small amount of carburetor cleaner around the intake area while the engine is running. If the RPM changes, a vacuum leak is present and should be repaired.