what causes the P0302 code in my Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug and Ignition Coil

• Inspect Spark Plug:
  • Remove the ignition coil from cylinder 2 using a socket set.
  • Remove the spark plug using a spark plug socket.
  • Check for signs of wear, such as fouling or excessive gap.
• Replace Spark Plug (if necessary):
  • Install a new spark plug with the correct gap specification (typically around 0.043 inches for Honda).
  • Torque to manufacturer specifications (usually around 13 lb-ft).
• Inspect and Replace Ignition Coil:
  • Check the ignition coil for cracks or damage.
  • If defective, replace it with a new ignition coil.
  • Reinstall the ignition coil and ensure all connections are secure.

3. Check Fuel Injector

• Inspect Fuel Injector:
  • Disconnect the electrical connector from the fuel injector.
  • Use a multimeter to check for proper resistance (refer to specifications, typically around 12-16 ohms).
• Replace Fuel Injector (if necessary):
  • Remove the fuel rail if needed, or access the injector directly.
  • Install a new fuel injector ensuring proper seating.
  • Reconnect the electrical connector and fuel lines.

4. Check for Vacuum Leaks

• Inspect Vacuum Hoses:
  • Visually inspect all vacuum lines and the intake manifold for cracks or loose connections.
  • Use a smoke machine or carb cleaner to check for leaks while the engine is running.
• Seal or Replace as Necessary:
  • Replace any damaged hoses or seal any leaks found.