why does my Volkswagen Golf MK7 (2015-2019) have a check engine light and a P0302 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery before starting work on electrical components.
• Allow the engine to cool completely.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil by unscrewing it or pulling it out gently.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the spark plug for signs of wear, carbon buildup, or damage.
• If necessary, replace the spark plug with a new one, tightening it to the manufacturer's specified torque (usually around 20 Nm).

3. Test and Replace Ignition Coil

• Swap the ignition coil from cylinder 2 with a coil from a different cylinder.
• Reconnect the ignition coil and start the engine.
• Check if the P0302 code reappears or if it follows to the new cylinder.
• If the problem follows the ignition coil, replace it with a new one.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, cleaning kit.
• Ensure the fuel system is depressurized before removal.
• Disconnect the fuel injector electrical connector.
• Remove the fuel rail and injector assembly.
• Inspect the fuel injector for clogs or faults.
• Clean or replace the fuel injector as necessary.
• Reinstall the fuel rail and ensure proper connection.

5. Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove all spark plugs.
• Insert the compression tester into cylinder 2.
• Crank the engine and record the compression reading.
• Compare results with specifications; replace the engine if low compression is detected.