how to fix P0302 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Remove the spark plug wire or ignition coil from cylinder 2.
  3. Use a spark plug socket to remove the old spark plug.
  4. Inspect the old spark plug for wear; replace if necessary.
  5. Install a new spark plug (use OEM recommended type) and torque to manufacturer specifications (typically 13 lb-ft).
  6. Reconnect the ignition coil or spark plug wire.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Remove the ignition coil from cylinder 2.
  2. Inspect the coil for cracks or signs of damage.
  3. Replace with a new ignition coil if defective (ensure it matches OEM specifications).
  4. Reinstall the ignition coil and reconnect the wiring harness.

4. Test Fuel Injector

• Sub-steps:
  1. Remove the fuel injector connector from cylinder 2.
  2. Use a noid light to check for proper electrical signal to the fuel injector.
  3. If no signal is detected, check wiring and connectors for damage.
  4. If the injector is faulty, replace it with a new one.
  5. Reconnect the injector and the electrical connector.

5. Reassemble and Check

• Sub-steps:
  1. Reinstall any components that were removed (engine cover, etc.).
  2. Reconnect the negative battery terminal.
  3. Clear the error codes using the OBD-II scanner.