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

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, compression tester, socket set, torque wrench, vacuum gauge.
• Safety Warnings: Disconnect the battery before working on electrical systems. Allow the engine to cool before opening any components.

2. Replace Spark Plug and Ignition Coil

1. Remove the engine cover (if applicable) by unscrewing any fasteners.
2. Disconnect the electrical connector from the ignition coil on cylinder 2.
3. Remove the ignition coil by unscrewing it from the cylinder head.
4. Remove the spark plug using a spark plug socket and ratchet.
5. Inspect the spark plug for wear; replace it if necessary.
6. Install a new spark plug into cylinder 2 and torque it to the manufacturer’s specification (typically around 22 lb-ft).
7. Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Fuel Injector (if necessary)

1. Disconnect the battery again to ensure safety.
2. Remove the engine cover if it obstructs access to the fuel rail.
3. Relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
4. Disconnect the fuel lines from the fuel injector and remove the retaining clips.
5. Remove the fuel injector from the rail and replace it with a new one, ensuring proper orientation.
6. Reconnect fuel lines and clips securely.

4. Conduct a Compression Test (if misfire persists)

1. Remove spark plug from cylinder 2.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for several seconds and record the compression reading.
4. Compare the reading with manufacturer specifications; if low, further engine diagnostics may be required.