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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil cover if necessary.
• Disconnect the ignition coil connector.
• Remove the ignition coil from cylinder one.
• Using a spark plug socket, carefully remove the spark plug.
• Inspect the spark plug for wear; replace it if necessary (use OEM recommended spark plug).
• Torque the new spark plug to the manufacturer’s specification (typically around 13 lb-ft).
• Reinstall the ignition coil.

3. Check and Replace Ignition Coil

• If the spark plug is fine but the misfire persists, test the ignition coil.
• Tools Required: Multimeter
• Measure the resistance of the ignition coil; compare with manufacturer specifications.
• If out of range, replace the ignition coil with a new, OEM part.
• Reconnect the ignition coil connector and ensure it is seated properly.

4. Inspect Fuel Injector

• If the ignition components are in good condition, check the fuel injector for cylinder one.
• Tools Required: Fuel injector cleaner or replacement injector
• If necessary, remove the fuel rail to access the injector.
• Inspect the injector for clogs or electrical issues.
• Clean or replace the injector as needed, ensuring connections are secure.

5. Conduct Compression Test

• If the misfire continues, perform a compression test.
• Tools Required: Compression gauge
• Remove spark plugs; insert the compression gauge into cylinder one.
• Crank the engine and record the compression reading.
• Compare the reading with manufacturer specifications (typically 180-200 psi); if low, further investigation of the engine internals may be needed.