how to fix a P0302 code in my Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  • Unplug the electrical connector from the ignition coil.
  • Remove the retaining bolts using a socket set.
  • Carefully lift the coil out.
• Remove the spark plug from cylinder 2 using a spark plug socket:
  • Use a ratchet and extension to reach the spark plug.
  • Turn counterclockwise to remove.
• Inspect the old spark plug for wear and replace it with a new one, ensuring the gap is set to manufacturer specifications (typically around 0.028-0.032 inches).
• Reinstall the ignition coil and securely fasten it.

3. Replace Ignition Coil (if necessary)

• If the ignition coil tested faulty or was swapped during diagnostics, replace it with a new one:
  • Align the new coil with the spark plug hole and press down firmly.
  • Reattach the retaining bolts and the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• If the fuel injector was found faulty, remove it:
  • Disconnect the electrical connector and the fuel line.
  • Remove the retaining clips and pull the injector out of the intake manifold.
• Clean the injector using a fuel injector cleaning kit or replace it with a new one.
• Reinstall the injector and reconnect all lines and connectors.

5. Conduct Final Checks

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle.
• Monitor for the check engine light and any abnormal sounds or vibrations.