what does error code P0302 mean for my Volkswagen Golf MK7 (2015-2019)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and secure it with wheel chocks.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Remove the ignition coil on cylinder 2 by unscrewing the retaining bolt and disconnecting the electrical connector.
• Extract the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for signs of wear, such as excessive carbon buildup or damage.
• Replace the spark plug with a new one, ensuring it is gapped correctly according to manufacturer specifications (typically around 0.028-0.032 inches).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil for proper function using a multimeter.
• If faulty, remove the ignition coil and replace it with a new one.
• Reassemble the ignition coil, ensuring all connections are secure.

4. Inspect Fuel Injector

• Remove the fuel rail (if necessary) to access the fuel injector for cylinder 2.
• Inspect the fuel injector for clogs or leaks.
• If defective, replace the fuel injector with a new one and reassemble the fuel rail.

5. Verify Compression

• Conduct a compression test on cylinder 2 using a compression tester.
• If the compression is below the manufacturer's specification (usually around 120-150 psi), further investigation into the engine's internal components may be necessary.