how to fix P0301 code in my Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool completely before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil cover if applicable.
• Disconnect the connector from the ignition coil on Cylinder 1.
• Remove the ignition coil using a socket set.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage; replace if necessary.
  • Torque Specification: Install new spark plug to 22 lb-ft (30 Nm).

3. Inspect and Replace Ignition Coil

• If the ignition coil is damaged or the spark plug replacement doesn't resolve the issue, replace the ignition coil.
• Install a new ignition coil, ensuring it seats properly on the spark plug.
• Reconnect the ignition coil connector.

4. Check and Replace Fuel Injector

• If the misfire persists, test the fuel injector for Cylinder 1.
• Disconnect the fuel injector connector and remove the injector using appropriate tools.
• Inspect the injector for clogs or damage; replace if necessary.
• Reinstall the new or cleaned injector and reconnect the connector.

5. Check for Vacuum Leaks

• Inspect all vacuum lines and the intake manifold for any leaks.
• Use a smoke machine or carburetor cleaner to detect leaks.
• Repair or replace any damaged hoses or intake gaskets.