how to fix P0302 code in my Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical short circuits.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil for Cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage. Replace if necessary.
• Install the new spark plug hand-tight, then torque to manufacturer's specifications (usually around 22 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug inspection reveals no issues, test the ignition coil with a multimeter for primary and secondary resistance.
• If out of specification, remove the faulty ignition coil and install a new one.
• Reconnect all connectors securely.

4. Test Fuel Injector

• Tools Required: Fuel injector tester or noid light
• Disconnect the fuel injector connector from Cylinder 2.
• Connect the fuel injector tester or noid light to the connector.
• Crank the engine and observe for proper operation (light flashing indicates proper signal).
• If the injector is faulty, replace it with a new one.

5. Compression Test

• Tools Required: Compression gauge
• Remove the spark plug for Cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine for several seconds and record the compression reading.
• Compare the reading with the manufacturer's specifications (typically 150-200 psi).
• If low, consider further investigation for internal engine issues.