what does P0301 code mean for my Volkswagen Golf MK7 (2015-2019)?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery negative terminal to ensure safety.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts.
• Carefully pull the ignition coil out and set it aside.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Install a new spark plug (check gap specifications) and torque it to the manufacturer's specifications (typically around 20-30 lb-ft).
• Reinstall the ignition coil and secure it.

3. Inspect and Repair Ignition Coil

• If the ignition coil appears faulty, replace it with a new one.
• Ensure the connector is clean and securely attached.
• Test the ignition coil resistance with a multimeter to confirm functionality.

4. Inspect Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel injector using a fuel injector puller if necessary.
• Inspect for any clogs or debris. Clean or replace the injector as needed.
• Reinstall the injector and connector securely.

5. Perform Compression Test

• Remove the spark plug from cylinder 1 and insert the compression tester.
• Crank the engine and record the compression reading.
• Compare to manufacturer specifications (typically 150-200 psi); if low, further investigation is required.