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

Solution

1. Preparation

• Gather tools and safety equipment.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down if it has been running.

2. Inspect Spark Plug

• Locate the spark plug for cylinder 1 (usually front left when facing the engine).
• Use a socket set to remove the spark plug.
• Inspect the spark plug for fouling, wear, or damage; replace it if necessary.
• Torque the new spark plug to the manufacturer's specification (typically around 13-16 lb-ft).

3. Check Ignition Coil

• Remove the ignition coil from cylinder 1.
• Inspect for cracks or physical damage.
• Test with a multimeter for proper resistance (refer to specifications; typically around 0.5-1.5 ohms).
• Replace the ignition coil if it is defective.

4. Perform Compression Test

• Remove the spark plug from cylinder 1 and insert a compression gauge.
• Crank the engine to obtain a reading; the compression should typically be within manufacturer specifications (around 180-200 psi).
• If the compression is low, further investigation into the valves or piston rings may be needed.

5. Inspect Fuel Injector

• Remove the fuel injector for cylinder 1.
• Inspect the injector for clogs and ensure it sprays fuel properly (perform a bench test if possible).
• Replace the fuel injector if it is faulty or clogged.

6. Check for Vacuum Leaks

• Visually inspect hoses and gaskets around the intake manifold for cracks or disconnections.
• Use a smoke machine to detect vacuum leaks if necessary.
• Repair or replace any damaged components.