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

Solution

1. Preparation

• Gather necessary tools and parts.
• Tools Required:
  • OBD-II scanner
  • Socket set
  • Torque wrench
  • Compression tester
  • Multimeter

2. Replace Spark Plug and Ignition Coil

• Step 1: Disconnect the negative battery terminal to prevent electrical shorts.
• Step 2: Remove the engine cover (if applicable) using a socket set.
• Step 3: Locate the ignition coil on cylinder 1. Unplug the electrical connector.
• Step 4: Remove the ignition coil bolt and lift the coil out.
• Step 5: Remove the old spark plug using a spark plug socket. Inspect for wear or fouling.
• Step 6: Install the new spark plug, tightening to the manufacturer’s specified torque (usually around 25 Nm).
• Step 7: Install the new ignition coil and reconnect the electrical connector. Secure it with the bolt.

3. Test Fuel Injector

• Step 1: Disconnect the electrical connector from the fuel injector for cylinder 1.
• Step 2: Use a multimeter to check the resistance of the fuel injector. Compare with specifications (typically around 12-16 ohms).
• Step 3: If the resistance is outside the specifications, replace the fuel injector.

4. Compression Test

• Step 1: Remove the spark plug from cylinder 1.
• Step 2: Insert the compression tester into the spark plug hole.
• Step 3: Crank the engine for several seconds and record the compression reading.
• Step 4: Compare the reading with the manufacturer’s specifications (usually between 150-200 psi). Replace the cylinder head gasket or repair any internal engine issues if readings are low.