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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before working on it.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Remove the ignition coil by unbolting it (torque specs: typically 10-15 Nm).
  4. Inspect the spark plug for wear; replace if necessary. Use OEM specifications for the spark plug gap.
  5. Install a new ignition coil and reconnect the connector.

3. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
  1. Visually inspect all vacuum hoses and the intake manifold for leaks.
  2. If using a smoke machine, introduce smoke into the intake system and observe for leaks.
  3. Repair or replace any damaged hoses or gaskets as needed.

4. Fuel System Inspection

• Tools Required: Fuel pressure gauge
  1. Locate the fuel rail and connect the fuel pressure gauge.
  2. Turn the ignition to the ON position without starting the engine and check the fuel pressure against specification (usually around 50-60 psi for most models).
  3. If pressure is low, inspect the fuel pump and filter for blockages or failure.

5. Compression Test

• Tools Required: Compression tester
  1. Remove spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine for a few seconds and read the compression value (specification typically varies, but generally around 150 psi).
  4. If compression is low, further investigation on the engine internals may be necessary.