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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaner.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical issues.

2. Spark Plug and Ignition Coil Replacement

• Sub-steps:
  1. Remove the engine cover (if applicable) to access the ignition coil.
  2. Disconnect the electrical connector from the ignition coil for cylinder 2.
  3. Remove the ignition coil using a socket set.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear; replace if necessary (use OEM specifications).
  6. Install the new spark plug and torque to manufacturer specifications (typically around 20 Nm).
  7. Install the new ignition coil and reconnect the electrical connector.

3. Fuel Injector Inspection and Cleaning

• Sub-steps:
  1. Disconnect the fuel injector electrical connector for cylinder 2.
  2. Remove the fuel rail if necessary to access the injector.
  3. Inspect the fuel injector for clogs or leaks; replace if damaged.
  4. Clean the injector using a fuel injector cleaner or replace it if necessary.
  5. Reinstall the fuel rail and reconnect the injector.

4. Compression Testing (if necessary)

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine for a few seconds and record the compression reading.
  4. If the compression is low, further investigation is needed for potential internal engine issues.

5. Final Checks

• Reconnect the battery after all repairs are complete.
• Start the engine and check for any new error codes.