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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, compression tester, fuel injector cleaner.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery before working on electrical components.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 2 by unscrewing the mounting bolts and disconnecting the electrical connector.
  2. Remove the spark plug using a spark plug socket and ratchet.
  3. Inspect the old spark plug for signs of wear or fouling; replace it with a new spark plug that meets manufacturer specifications.
  4. Reinstall the spark plug and torque it to the manufacturer’s specifications (typically around 13 lb-ft).
  5. Reattach the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. Use a multimeter to measure the primary and secondary resistance of the ignition coil.
  2. If readings are outside manufacturer specifications, replace the ignition coil with a new one.
  3. Reinstall the new ignition coil, ensuring it's properly seated and connected.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Remove the fuel injector from cylinder 2 by disconnecting the electrical connector and fuel line (use a fuel line removal tool).
  2. Inspect the injector for blockage or damage.
  3. Clean the fuel injector using a fuel injector cleaner.
  4. Reinstall the injector and reconnect the fuel line and electrical connector.

5. Conduct Compression Test (optional)

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine for several seconds and record the compression reading.
  4. If compression is low, further investigation into mechanical issues may be necessary.