my Volkswagen Golf MK7 (2015-2019) has a P0302 code, what does it mean?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2 by unscrewing any bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket. Inspect it for wear or damage.
• If worn, replace with a new spark plug (refer to manufacturer specifications for type and gap).
• Reinstall the spark plug and the ignition coil, ensuring it is securely connected.

3. Check and Replace Ignition Coil (if needed)

• If the ignition coil appears damaged or if the spark plug was not the issue, replace the ignition coil for cylinder 2.
• Disconnect the electrical connector and remove the ignition coil.
• Install the new ignition coil, connect the electrical connector, and secure it with bolts.

4. Inspect and Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check for electrical signals; if no signal is present, further diagnostics are needed.
• If the injector is faulty, replace it by removing the fuel rail (if applicable) and installing a new injector.

5. Perform Compression Test

• If misfire persists, perform a compression test on cylinder 2.
• If compression is low, further investigation into the engine internals is required, such as valve issues or head gasket failure.