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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaning kit.
• Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Use a socket set to remove the ignition coil from cylinder 1.
• Carefully extract the spark plug using a spark plug socket.
• Inspect the spark plug for signs of damage or wear; replace if necessary.
• Ensure the new spark plug is gapped appropriately as per manufacturer specifications (usually around 0.043 inches for Honda).
• Reinstall the spark plug and ignition coil, tightening to the manufacturer’s torque specifications (typically around 13 lb-ft).

3. Check and Replace Ignition Coil (if needed)

• If the ignition coil appears damaged or if the spark plug was fouled, replace the ignition coil for cylinder 1.
• Disconnect the electrical connector and remove the ignition coil.
• Install the new ignition coil and reconnect the electrical connector securely.

4. Inspect and Clean Fuel Injector (if necessary)

• If the injector is suspected of being clogged, remove the fuel injector from cylinder 1.
• Clean the fuel injector using a fuel injector cleaning kit or replace it with a new injector if cleaning does not resolve the issue.
• Reinstall the injector and ensure it is seated properly in the manifold.

5. Verify Compression

• If misfire persists, perform a compression test on cylinder 1.
• Remove the spark plug and insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading (should be within manufacturer specifications).
• If compression is low, further investigation into the engine’s internal components may be necessary.