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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the ignition coil using the socket set, taking care not to damage surrounding components.
• Remove the spark plug using the spark plug socket, inspecting it for wear or fouling.
• Replace the spark plug with the manufacturer-recommended part, ensuring it is properly gapped.
• Reinstall the ignition coil and reconnect the electrical connector, ensuring it clicks into place.

3. Inspect Fuel Delivery

• Tools Required: Fuel pressure gauge
• Locate the fuel injector for cylinder 1.
• Disconnect the fuel injector connector.
• Use the fuel pressure gauge to check pressure at the fuel rail; it should meet manufacturer specifications.
• If pressure is low, check the fuel pump and filter for issues.
• If the fuel injector is clogged or faulty, replace it with a new one.

4. Compression Test

• Tools Required: Compression tester
• Remove the ignition coil and spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine a few times and record the pressure reading.
• Compare the reading with manufacturer specifications; if low, further investigation is needed for possible internal engine issues.

5. Final Checks

• Reconnect the battery terminal.
• Clear the P0301 code using the OBD-II scanner.
• Start the engine and check for any abnormal noises or performance issues.