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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to avoid electrical shock or short circuits.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil:
  • Unscrew the mounting bolts using a socket set.
  • Disconnect the electrical connector.
• Extract the spark plug using a spark plug socket.
• Inspect the spark plug for signs of wear (e.g., carbon buildup, damage).
• Replace with a new spark plug (OEM recommended) and torque to 13 lb-ft (18 Nm).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, check the ignition coil:
  • Remove the ignition coil as previously described.
  • Test the ignition coil with a multimeter for proper resistance (consult service manual for specifics).
  • Replace the ignition coil if it fails the test.
• Reinstall the new ignition coil following the same procedure as above.

4. Clean or Replace Fuel Injector

• If ignition components are functioning correctly, check the fuel injector:
  • Disconnect the fuel injector connector.
  • Remove the fuel rail (follow manufacturer specifications for safe removal).
  • Inspect and clean the fuel injector with appropriate cleaner or replace if necessary.
• Reinstall the fuel rail and reconnect all connectors.

5. Compression Test

• If misfire persists, perform a compression test:
  • Remove the spark plug from cylinder 1.
  • Install the compression gauge and crank the engine.
  • Compare the reading to manufacturer specifications (typically 190-210 psi).
• If compression is low, further engine diagnostics may be required (e.g., checking for valve issues).