how to fix P0301 misfire code in my Honda CR-V Fifth Generation (2017-2022)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil on cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Extract the spark plug using a spark plug socket.
• Inspect the spark plug for wear, deposits, or damage. Replace it if necessary.
• Install the new spark plug and torque it to the manufacturer's specifications (typically around 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if needed)

• If the spark plug is in good condition, proceed to test the ignition coil.
• Tools Required: Multimeter.
• Use a multimeter to check the resistance of the ignition coil. Compare results to specifications in the service manual.
• If the coil is faulty, replace it with a new one, ensuring proper installation.

4. Inspect and Replace Fuel Injector (if needed)

• Tools Required: Fuel injector removal tool, socket set.
• Disconnect the fuel injector connector and remove the fuel rail if necessary.
• Remove the fuel injector from cylinder 1.
• Test the injector using a noid light or by connecting it to a fuel injector tester to ensure it’s functioning.
• Replace the injector if it does not operate correctly. Reinstall the fuel rail and injector, ensuring proper sealing.

5. Compression Testing

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 1 and install the compression tester.
• Crank the engine several times and record the compression reading.
• Compare the reading to factory specifications. If low, further investigation of internal engine issues may be required.