how to fix P0302 code in my Volkswagen Golf MK7.5 (2020-Present)?

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, socket set, spark plug socket, torque wrench, compression tester, fuel injector cleaner, and replacement spark plugs or ignition coils if necessary.
• Ensure the vehicle is parked on a level surface and the engine is off and cool.

2. Inspect and Replace Spark Plug

1. Disconnect the negative battery terminal to prevent electrical shorts.
2. Remove the engine cover if present to access the ignition components.
3. Use a socket to remove the spark plug from cylinder 2.
4. Inspect the spark plug for signs of wear (e.g., excessive carbon buildup, wear on the electrode).
5. If worn, replace the spark plug with a new one. Torque the new spark plug to the manufacturer’s specifications (usually around 20-30 Nm).
6. Reconnect the spark plug wire or ignition coil.

3. Check and Replace Ignition Coil

1. If the spark plug inspection is satisfactory, test the ignition coil for cylinder 2.
2. Disconnect the electrical connector from the ignition coil.
3. Remove the ignition coil using a socket, noting its orientation for reinstallation.
4. Inspect for cracks or signs of damage on the coil.
5. If defective, replace with a new ignition coil and torque to specifications.
6. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

1. With the ignition coil and spark plug removed, access the fuel injector for cylinder 2.
2. Disconnect the fuel injector connector.
3. Remove the fuel injector using a suitable tool.
4. Inspect for clogs or dirt; if necessary, clean the injector using an appropriate fuel injector cleaner.
5. Reinstall the injector and ensure it is securely connected.

5. Perform Compression Test

1. Attach the compression tester to the spark plug hole of cylinder 2.
2. Crank the engine for a few seconds and record the compression reading.
3. Compare the reading with manufacturer specifications for that engine.
4. If the compression is low, further investigation into engine internals may be required.