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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaning kit.
• Disconnect the negative battery terminal to prevent electrical shorts or shocks.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil for cylinder 2 by unscrewing the retaining bolts and disconnecting the electrical connector.
  2. Remove the spark plug using a spark plug socket and ratchet.
  3. Inspect the new spark plug for the correct gap (typically around 0.028-0.032 inches for VW engines).
  4. Install the new spark plug and torque it to the manufacturer's specification (usually around 22 lb-ft).
  5. Reinstall the ignition coil, ensuring the electrical connector is secure.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil failed the test, remove the faulty coil from cylinder 2.
  2. Install the new ignition coil, ensuring it clicks into place and is properly seated.
  3. Reconnect the electrical connector and secure any bolts.

4. Clean or Replace Fuel Injector (if necessary)

• Sub-steps:
  1. Remove the fuel injector from cylinder 2 (may require removal of fuel rail).
  2. Clean the injector using a fuel injector cleaning kit, or replace it if cleaning does not resolve the issue.
  3. Reinstall the fuel injector, ensuring proper seating and connection.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code from the ECU.