what does it mean when my Honda Accord Eleventh Generation (2023-present) has a P0302 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and secured with wheel chocks.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the spark plug for cylinder 2 (refer to the service manual for location).
  3. Remove the ignition coil from cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
  4. Use a spark plug socket to remove the spark plug.
  5. Inspect the spark plug for wear, carbon deposits, or damage; replace if necessary.
  6. Install a new spark plug, hand-tightening it first, then torque to the manufacturer’s specification (generally around 13-20 ft-lbs).
  7. Reattach the ignition coil and secure with bolts.

3. Check and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug was fine, test the ignition coil using a multimeter to check for proper resistance.
  2. If faulty, remove the ignition coil and replace it with a new one.
  3. Reconnect the electrical connector and secure it in place.

4. Inspect and Replace Fuel Injector (if necessary)

• Sub-steps:
  1. If the ignition coil and spark plug are functioning, remove the fuel injector connector for cylinder 2.
  2. Perform a resistance test on the injector with a multimeter. Replace if out of specification.
  3. If replacing, remove the fuel rail if necessary to access the injector.
  4. Install the new fuel injector, ensuring seals are properly in place.
  5. Reconnect the fuel injector connector.

5. Compression Test

• Sub-steps:
  1. Remove spark plugs from all cylinders.
  2. Insert a compression gauge into cylinder 2 and crank the engine a few times.
  3. Compare the compression readings with manufacturer specifications; if low, further investigation is needed.