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 ensure safety.
• Allow the engine to cool down if it was recently running.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector from the spark plug.
  3. Remove the ignition coil from cylinder 1 using a socket set.
  4. Use a spark plug socket to remove the spark plug from cylinder 1.
  5. Inspect the spark plug for wear; replace it if necessary with the manufacturer-recommended spark plug type (DENSO or NGK).
  6. Install the new spark plug by hand, then torque to manufacturer specifications (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Test the ignition coil's resistance with a multimeter according to specifications (typically around 0.5 to 1.5 ohms for primary).
  2. If faulty, replace the ignition coil with a new one (ensure it matches OEM specifications).
  3. Reconnect the ignition coil to the spark plug and ensure a secure fit.

4. Check Fuel Injector

• Sub-steps:
  1. Remove the fuel injector connector on cylinder 1.
  2. Perform a resistance test on the fuel injector (typically around 12-16 ohms).
  3. If the injector is faulty, replace it with a new one, ensuring it matches OEM specifications.
  4. Reconnect the injector connector securely.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 1.
  2. Insert a compression gauge into the cylinder.
  3. Crank the engine to get the compression reading. Compare it to the manufacturer specifications (typically 180-220 psi).
  4. If compression is low, further diagnostic work may be needed (potentially checking for valve issues or head gasket failure).