how to fix P0301 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

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

2. Spark Plug Replacement

• Tools Required: Socket set, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts and disconnecting the electrical connector.
• Use a spark plug socket to carefully remove the spark plug from cylinder 1.
• Inspect the old spark plug for wear; if necessary, replace it with a new spark plug, ensuring it is gapped correctly.
• Torque the new spark plug to the manufacturer’s specifications (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Ignition Coil Inspection/Replacement

• If the spark plug replacement does not resolve the issue, test the ignition coil.
• If faulty, remove the ignition coil for cylinder 1 by unscrewing the mounting bolts and disconnecting the electrical connector.
• Replace with a new ignition coil, ensuring it fits securely and reconnect the electrical connector.

4. Fuel Injector Inspection

• If the misfire persists, inspect the fuel injector for cylinder 1.
• Disconnect the fuel injector connector and remove the injector.
• Clean or replace the fuel injector as necessary, ensuring the O-rings are intact and properly seated.

5. Compression Test

• If all previous components are functioning, perform a compression test on cylinder 1.
• If the compression is low, further investigation into internal engine components may be needed (i.e., piston rings, valves).