how to fix P0301 code in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install a new spark plug, torque to manufacturer specifications (typically around 22 lb-ft).
• Reinstall the ignition coil, ensuring it is seated properly and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• If the ignition coil appears faulty or if the spark plug was not the issue, remove the ignition coil from cylinder 1.
• Install a new ignition coil, torque to manufacturer specifications.
• Reconnect the electrical connector.

4. Fuel Injector Service

• Tools Required: Fuel injector cleaner kit or replacement injectors
• If misfire persists, test the fuel injector for cylinder 1.
• Clean the injector using a fuel injector cleaning kit or replace it if it is clogged or malfunctioning.

5. Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1 and install the compression tester.
• Crank the engine and check the compression reading; it should be within manufacturer specifications.
• If compression is low, further investigation is needed for internal engine issues.

6. Inspect for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
• Use a smoke machine to check for vacuum leaks around intake manifold and hoses.
• Repair or replace any leaking components as necessary.