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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil for cylinder 1:
  1. Unplug the electrical connector.
  2. Remove the retaining bolt using a socket set.
  3. Gently pull the ignition coil out.
• Remove the spark plug:
  1. Use a spark plug socket to unscrew and remove the spark plug from cylinder 1.
  2. Inspect the spark plug for wear or fouling; replace if necessary.
• Install a new spark plug:
  1. Gap the new spark plug according to manufacturer specifications (typically around 0.043 inches).
  2. Install the spark plug and tighten to the specified torque (around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if needed)

• If the ignition coil is found to be faulty during inspection:
  1. Remove the ignition coil as described in Step 2.
  2. Install a new ignition coil for cylinder 1.
  3. Reconnect the electrical connector and secure with the retaining bolt.

4. Check Fuel Injector (if needed)

• If fuel delivery is suspected:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Remove the fuel rail if necessary to access the injector.
  3. Replace the fuel injector if it is clogged or defective.
  4. Reinstall the fuel rail and reconnect all connectors.

5. Verify Compression (if needed)

• If low compression is detected:
  1. Perform necessary repairs such as a valve adjustment, head gasket replacement, or piston ring replacement as indicated by the compression test results.