how to fix P0302 code on Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Clear the trouble codes using the OBD-II scanner before starting repairs.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if necessary to access the spark plugs.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Remove the ignition coil from cylinder 2.
  4. Remove the spark plug using a socket and ratchet.
  5. Inspect the spark plug for wear. If damaged or worn, replace it with a new one (refer to manufacturer specifications for the correct type).
  6. Reinstall the spark plug and torque to manufacturer's specification (typically around 13 lb-ft or 18 Nm).

3. Check and Replace Ignition Coil

• Sub-steps:
  1. Use a multimeter to test the resistance of the ignition coil for cylinder 2.
  2. If out of specification, remove the ignition coil and replace it with a new one.
  3. Reconnect the ignition coil connector and ensure it is securely seated.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Remove the fuel rail and disconnect the fuel injector for cylinder 2.
  2. Inspect the injector for clogs. If dirty, clean it using a fuel injector cleaner.
  3. Reinstall the injector and fuel rail, ensuring all connections are secure.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester and crank the engine to obtain a reading.
  3. Compare the reading to the manufacturer's specifications. If compression is low, further investigation is needed (potential valve or piston issues).

6. Check for Vacuum Leaks

• Sub-steps:
  1. Inspect all vacuum hoses and the intake manifold for cracks or loose connections.
  2. If leaks are found, replace or tighten as necessary.