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

Solution

1. Preparation

• Gather tools and parts for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 1.
• Remove the ignition coil by unbolting it and pulling it out.
• Use a spark plug socket to remove the spark plug.
• Install the new spark plug hand-tight, then torque to 13 lb-ft (18 Nm).
• Reinstall the ignition coil and reattach the connector.

3. Inspect/Replace Ignition Coil

• Tools Required: Socket set, multimeter.
• Test the ignition coil's primary and secondary resistance according to the manufacturer specifications.
• If the coil is faulty, replace it with a new one.
• Reinstall the coil and ensure the connection is secure.

4. Inspect/Replace Fuel Injector

• Tools Required: Noid light, socket set.
• Check the fuel injector for cylinder 1 with a noid light to ensure proper operation.
• If the injector does not function, remove it by disconnecting the electrical connector and fuel line.
• Install a new fuel injector and reconnect the lines and connector.

5. Perform Compression Test

• Tools Required: Compression gauge.
• Remove all spark plugs for easier access.
• Insert the compression gauge into cylinder 1 and crank the engine.
• Compare the reading to manufacturer specifications. Replace the engine if compression is low.