how to fix P0302 code in my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts.
• Ensure the engine is cool and disconnect the negative battery terminal to prevent electrical shock.
• Tools Required: OBD-II scanner, spark plug socket, torque wrench, multimeter, compression tester, basic hand tools.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 2 using a socket.
  2. Remove the spark plug using a spark plug socket.
  3. Inspect the spark plug for signs of wear or fouling, and replace if necessary.
  4. Install the new spark plug using the manufacturer’s specified torque (typically around 22 ft-lbs).
  5. Reattach the ignition coil securely.

3. Inspect and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the spark plug was fine, test the ignition coil with a multimeter according to the manufacturer’s specifications.
  2. If faulty, remove the ignition coil from cylinder 2.
  3. Install a new ignition coil, ensuring it clicks into place.
  4. Reconnect the electrical connector.

4. Inspect Fuel Injector

• Sub-steps:
  1. Remove any necessary components to access the fuel injector for cylinder 2.
  2. Disconnect the fuel injector connector.
  3. Use a multimeter to check the injector's resistance; replace if it does not meet specifications.
  4. Install a new fuel injector if required, ensuring it is seated properly and reconnect the electrical connector.

5. Compression Test

• Sub-steps:
  1. Remove the spark plugs to allow for easier cranking.
  2. Insert the compression tester into the cylinder 2 spark plug hole.
  3. Crank the engine for a few seconds and record the reading.
  4. Compare compression to specifications; if low, further investigation into engine internals may be needed.