my Honda CR-V Fifth Generation (2017-2022) has a check engine light and code P0301, what should I do

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shock.
• Allow the engine to cool completely before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil on cylinder 1 by disconnecting the electrical connector and unscrewing the mounting bolts.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage. Replace with a new spark plug if necessary, ensuring the proper gap (typically 0.043 inches for Honda).
• Reinstall the spark plug and ignition coil, tightening the spark plug to the manufacturer’s specified torque (usually around 13 lb-ft).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil using a multimeter for primary and secondary resistance.
• If the coil is faulty, remove it from the engine and install a new ignition coil, ensuring proper alignment and connection.

4. Inspect Fuel Injector

• Remove the fuel injector from cylinder 1.
• Check for clogs; if necessary, clean or replace the injector.
• Reinstall the injector and ensure it is securely connected.

5. Compression Test (if necessary)

• If misfire persists, perform a compression test on cylinder 1.
• If compression is below specifications, further investigation into engine internals may be necessary.