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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down completely before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap gauge.
• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 1 (typically at the front of the engine).
• Use a socket to carefully remove the spark plug.
• Check the gap of the new spark plug using a gap gauge, adjust if necessary.
• Install the new spark plug and torque to manufacturer specifications (usually around 20 Nm).
• Reattach the engine cover.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Disconnect the electrical connector from the ignition coil.
• Remove the bolts securing the ignition coil and pull it out.
• Install the new ignition coil and secure it with bolts, torque to manufacturer specifications.
• Reconnect the electrical connector.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaning kit (if cleaning) or replacement fuel injector set.
• If cleaning, disconnect the fuel line and electrical connector from the injector.
• Use the cleaning kit as per the manufacturer's instructions to clean the injector.
• If replacing, remove the old injector and install the new one, ensuring a proper seal.

5. Compression Test (if necessary)

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1.
• Insert the compression gauge into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the reading against manufacturer specifications (usually 180-220 psi for most gasoline engines).