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

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Locate cylinder 1 spark plug (typically found near the front of the engine).
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear, carbon buildup, or damage. If necessary, replace with a new spark plug (OEM recommended).
• Torque the new spark plug to the manufacturer’s specifications (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil in cylinder 1.
• Remove the ignition coil by unscrewing the mounting bolts.
• Inspect the coil for cracks or damage. Replace it with a new ignition coil if needed.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Test and Clean Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the injector's resistance; it should be within manufacturer specifications.
• If the injector is faulty, replace it with a new one.
• If it's functional, consider cleaning the injector using a fuel injector cleaner.

5. Perform Compression Test

• Remove all spark plugs to avoid engine damage during testing.
• Insert a compression tester into cylinder 1’s spark plug hole.
• Crank the engine and read the compression value. It should align with manufacturer specifications (typically around 180 psi).
• If compression is low, further inspection of the engine may be necessary.