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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, 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 the spark plug for wear or damage, and replace it if necessary.
• Install the new spark plug, ensuring it is torqued to the manufacturer’s specification (typically around 13 lb-ft for Honda).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the spark plug inspection showed no issues, test the ignition coil with a multimeter to check for proper resistance.
• If the coil is faulty, remove it from the engine.
• Install the new ignition coil by reversing the removal steps, ensuring it is properly secured and connected.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit.
• Connect the fuel pressure gauge to the fuel rail and check the pressure; it should match manufacturer specifications (typically around 50-60 psi).
• If pressure is low, inspect the fuel filter and pump.
• If the injector is clogged, use an injector cleaning kit to clean it or replace the injector as needed.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• Use a smoke machine to check for vacuum leaks around the intake manifold and associated hoses.
• If leaks are found, replace the damaged hoses or gaskets.