what does it mean when my Volkswagen Golf MK7 (2015-2019) has a P0301 code

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and engage the parking brake.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, flathead screwdriver.
• Remove the engine cover (if applicable) to access the ignition components.
• Disconnect the negative battery cable to prevent electrical shorts.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and lifting it out.
• Inspect the spark plug; replace it if it shows signs of wear or fouling.
• Install a new spark plug (torque to manufacturer's specification).
• Reinstall the ignition coil and reconnect its electrical connector.

3. Check and Replace Fuel Injector (if necessary)

• Tools Required: Fuel line disconnect tool, ratchet set.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel line from the injector using the fuel line disconnect tool.
• Remove the fuel injector from the rail and inspect it. Replace if clogged or malfunctioning.
• Install the new fuel injector, reconnect the fuel line, and reinsert the fuel pump fuse.

4. Perform Compression Test (if needed)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole and crank the engine.
• Compare the compression reading to the manufacturer's specifications; replace if low.