how to fix P0301 code in Honda Accord 10th Generation (2018-2022) engine

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.

Tools Required:

• OBD-II scanner
• Spark plug socket
• Torque wrench
• Compression gauge
• Multimeter
• Fuel injector cleaning kit (if needed)

2. Inspect and Replace Spark Plugs

1. Remove the engine cover (if applicable) using a socket wrench.
2. Use the spark plug socket to remove the spark plug from cylinder 1.
3. Inspect the spark plug for signs of wear, carbon buildup, or oil contamination.
4. If damaged, replace the spark plug with a new one, ensuring it matches factory specifications.
5. Torque the new spark plug to the manufacturer’s specifications (typically around 13 ft-lbs).

3. Check and Replace Ignition Coil

1. Disconnect the ignition coil connector for cylinder 1.
2. Remove the ignition coil using the appropriate socket.
3. Test the ignition coil with a multimeter to ensure it is functioning within specifications (consult service manual for specific resistance values).
4. If defective, replace the ignition coil with a new one.
5. Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect Fuel Injector

1. Remove the fuel injector connector from cylinder 1.
2. Use a multimeter to test for proper voltage and resistance at the injector connector.
3. If the injector is faulty, remove it from the fuel rail using an appropriate tool.
4. Clean the injector using a fuel injector cleaning kit or replace it with a new one if necessary.
5. Reinstall the injector and reconnect the electrical connector.

5. Perform Compression Test

1. Remove the spark plug from cylinder 1 again.
2. Insert the compression gauge into the spark plug hole.
3. Crank the engine a few times and record the compression reading.
4. Compare the reading with the manufacturer’s specifications (usually around 170 psi).
5. If compression is low, further inspection of piston rings and valves may be necessary.

6. Check for Vacuum Leaks

1. Visually inspect vacuum hoses and connections for any signs of wear or damage.
2. Use a smoke machine or carburetor cleaner to check for leaks while the engine is running.
3. Repair or replace any damaged hoses or components found during inspection.