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

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the ignition coil from cylinder 1:
  1. Unplug the electrical connector from the ignition coil.
  2. Remove the bolts securing the ignition coil and gently pull it out.
• Remove the spark plug:
  1. Use a spark plug socket to unscrew the spark plug from cylinder 1.
  2. Inspect the spark plug for wear, carbon deposits, or damage.
• Install a new spark plug:
  1. Apply anti-seize compound to the threads of the new spark plug.
  2. Hand-tighten the spark plug into the cylinder, then torque to manufacturer specifications (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• If the spark plug appears fine, check the ignition coil:
  1. Visually inspect the coil for cracks or damage.
  2. If necessary, replace the ignition coil with a new one:
     • Install the new coil in reverse order of removal.
     • Reconnect the electrical connector and secure with bolts.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, injector puller (if needed)
• Test the fuel injector functionality:
  1. Use a noid light or multimeter to check for pulse signal.
  2. If the injector is faulty, replace it.
• Clean the fuel injector:
  1. Use a fuel injector cleaning kit to clean the injector while still installed or replace it if necessary.

5. Compression Test

• Tools Required: Compression gauge
• Perform a compression test on cylinder 1:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression gauge into the spark plug hole.
  3. Crank the engine a few times and record the pressure reading.
  4. If the compression is low, further investigation of internal engine components may be needed.