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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before beginning work.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, ratchet, gap gauge.
• Remove the ignition coil cover (if applicable).
• Unscrew and remove the spark plug from cylinder 1.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace the spark plug with a new one, ensuring the correct gap (typically around 0.028-0.032 inches for most applications).
• Reinstall the spark plug and torque it to manufacturer specifications (usually around 22 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil for cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Inspect the ignition coil for cracks or signs of overheating.
• If defective, replace it with a new ignition coil that meets OEM specifications.
• Reinstall the ignition coil and torque the bolts to manufacturer specifications.

4. Check Fuel Injector

• Tools Required: Noid light or multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Connect a noid light to the injector connector and crank the engine; the light should flash, indicating proper signal.
• If the injector does not operate, replace the fuel injector with a new OEM part.
• Reconnect the injector connector after inspection or replacement.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole and crank the engine for about 5 seconds.
• Compare the reading to the manufacturer’s specifications (usually around 140-200 PSI).
• If compression is low, further diagnostics on the engine internals may be necessary.