how to fix P0301 code in Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface with the engine off and cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 1.
• Use a spark plug socket and ratchet to remove the old spark plug.
• Inspect the spark plug socket for debris and ensure it's clean.
• Install a new spark plug, tightening it to the manufacturer's specified torque (check the owner's manual, typically around 22-30 Nm).
• Reattach any components removed.

3. Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil.
• Remove the bolt(s) securing the ignition coil using a socket set.
• Gently pull the ignition coil out of the spark plug well.
• Install the new ignition coil, ensuring it seats properly.
• Reconnect the electrical connector and secure the ignition coil with the bolt(s).

4. Test Fuel Injector

• If the issue persists, locate the fuel injector for cylinder 1.
• Disconnect the fuel injector connector.
• Use a multimeter to check for proper resistance; replace if out of specification.
• If necessary, clean or replace the fuel injector.

5. Verify Engine Compression

• If misfire continues, perform a compression test on cylinder 1.
• Remove the spark plug and screw in the compression tester.
• Crank the engine and record the compression reading. Compare with specifications (around 180-200 psi).
• If compression is low, further investigation for head gasket issues or internal engine problems is required.