how to troubleshoot P0302 code on Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

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

2. Replace Spark Plug and Ignition Coil (if faulty)

• Tools Required: Socket set, torque wrench, anti-seize compound.
• Remove the ignition coil from cylinder 2:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the bolts securing the ignition coil using a socket.
  3. Gently pull the ignition coil out.
• Replace the spark plug:
  1. Use a spark plug socket to remove the old spark plug.
  2. Apply a small amount of anti-seize compound to the threads of the new spark plug.
  3. Install the new spark plug and torque it to the manufacturer's specifications (typically around 13 lb-ft).
• Reinstall the ignition coil:
  1. Position the ignition coil over the new spark plug and secure it with bolts.
  2. Reconnect the electrical connector.

3. Test Fuel Injector (if necessary)

• Tools Required: Multimeter or fuel pressure gauge.
• Remove the fuel injector from cylinder 2:
  1. Disconnect the electrical connector from the fuel injector.
  2. Remove any retaining clips, if present, and then pull out the injector.
• Test the injector:
  1. Use a multimeter to check for continuity and that the injector is receiving power.
  2. If the injector is faulty, replace it with a new one.
• Reinstall the fuel injector:
  1. Ensure O-rings are lubricated and install the new injector.
  2. Reattach the retaining clips and electrical connector.

4. Perform Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove spark plugs from all cylinders.
• Insert the compression tester into cylinder 2 and crank the engine several times:
  1. Record the pressure reading; it should be within the manufacturer's specified range.
  2. If the compression is low, investigate further for possible internal engine issues.