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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, noid light.
• Allow the engine to cool before starting work.
• Disconnect the negative battery terminal for safety.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Unscrew the bolts securing the ignition coil.
  • Gently pull the ignition coil out.
• Remove the spark plug:
  • Use a spark plug socket and ratchet to unscrew the spark plug.
  • Inspect the spark plug for fouling or excessive wear.
• Install a new spark plug:
  • Apply a small amount of anti-seize compound to the threads of the new spark plug.
  • Torque to manufacturer's specifications (typically around 13-16 lb-ft).
• Reinstall the ignition coil:
  • Slide the coil back into place and secure it with bolts.

3. Replace Ignition Coil

• If the ignition coil was found defective:
  • Follow the same steps as above to remove the faulty coil.
  • Install a new ignition coil compatible with the vehicle.
  • Ensure the connector is securely attached.

4. Test Fuel Injector

• Check fuel injector operation:
  • Connect the noid light to the fuel injector connector for cylinder 1.
  • Crank the engine and observe if the noid light flashes, indicating proper injector function.
• If the injector does not operate:
  • Disconnect the fuel line and replace the faulty injector with a new one.
  • Ensure all connections are secure.

5. Compression Test

• Perform a compression test on cylinder 1:
  • Remove the spark plug and insert the compression tester.
  • Crank the engine and record the compression reading.
• Compare the reading with manufacturer specifications; if low, further investigation may be needed for internal engine issues (e.g., valve problems, head gasket failure).