how to fix the P0302 code on my Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Locate the spark plug of cylinder 2 (refer to the owner's manual for location).
  3. Use a spark plug socket and ratchet to remove the old spark plug.
  4. Inspect the old spark plug for wear and compare it to the new one.
  5. Apply anti-seize compound to the threads of the new spark plug.
  6. Install the new spark plug and torque it to manufacturer specifications (typically around 22 lb-ft).

3. Test Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil on cylinder 2.
  2. Remove the ignition coil using a socket set.
  3. Test the ignition coil with a multimeter for proper resistance (consult repair manual for specific values).
  4. If faulty, replace with a new ignition coil.
  5. Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect Fuel Injector

• Sub-steps:
  1. Remove the fuel rail assembly if required to access the injector.
  2. Disconnect the electrical connector from the fuel injector on cylinder 2.
  3. Remove the fuel injector from the rail.
  4. Inspect the injector for clogs; clean or replace if necessary.
  5. Reinstall the injector and reconnect the electrical connector.

5. Conduct Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert a compression tester into the spark plug hole.
  3. Crank the engine several times and record the compression reading.
  4. Compare the reading to manufacturer specifications (typically around 180 psi).
  5. If compression is low, further investigation is needed (valve issues, head gasket failure, etc.).