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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil and spark plug from cylinder 1.
• Inspect the spark plug for wear, carbon fouling, or damage; replace if needed.
• Torque the new spark plug to the manufacturer-recommended specification (typically around 13-16 lb-ft).
• Reinstall the ignition coil ensuring it is seated properly.

3. Test and Replace Ignition Coil (if necessary)

• Tools Required: Multimeter.
• Test the ignition coil for resistance according to specifications (consult service manual).
• If the coil is faulty, replace it with a new one.
• Reinstall the coil, ensuring proper connection.

4. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Noid light or fuel pressure gauge.
• Check the operation of the fuel injector for cylinder 1.
• If the injector is not functioning, remove and replace it.
• Reinstall the new injector, ensuring proper seating and connection.

5. Verify Engine Compression (if necessary)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester and crank the engine to measure compression.
• If compression is low, further diagnosis of internal engine components may be required.