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

Solution

1. Preparation

• Gather tools and parts. Ensure the engine is cool and the vehicle is parked on a level surface.
• Tools Required: OBD-II scanner, spark plug socket, torque wrench, multimeter, compression tester, basic hand tools.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for fouling, wear, or damage.
• If the spark plug is worn, replace it with a new OEM or equivalent spark plug.
• Torque the new spark plug to the manufacturer's specifications (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the wiring harness from the ignition coil for cylinder 1.
• Remove the ignition coil using a socket or ratchet.
• Inspect the ignition coil for cracks or signs of damage.
• Replace with a new OEM ignition coil if needed.
• Reconnect the wiring harness and ensure it is secure.

4. Fuel Injector Test and Cleaning

• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the resistance of the fuel injector (typically 12-16 ohms).
• If the injector is out of specification, replace it with a new injector.
• If the injector is functioning but dirty, consider using a fuel injector cleaner or perform an ultrasonic cleaning.

5. Compression Test

• Remove the spark plug from cylinder 1 and install the compression tester.
• Crank the engine several times and record the compression reading.
• Compare the reading to the manufacturer’s specifications (usually around 150-200 psi).
• If compression is low, further investigation is required (e.g., valve issues, head gasket).