how to fix P0301 code in my Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, compression tester, fuel injector cleaning kit.
• Ensure the vehicle is parked on a level surface and the engine is cool. Disconnect the battery to avoid electrical shorts.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1 by unscrewing its bolts.
• Disconnect the electrical connector from the ignition coil.
• Remove the old spark plug using a spark plug socket.
• Inspect the spark plug gap and replace it with a new spark plug, ensuring proper torque (typically 20 Nm or as specified).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil with a multimeter for proper resistance (typically around 0.5-1.5 ohms for primary).
• If faulty, remove the ignition coil and replace it with a new one, ensuring it’s seated correctly and connected properly.

4. Check and Clean Fuel Injector

• If the ignition coil is functioning correctly, remove the fuel injector for cylinder 1.
• Use a fuel injector cleaning kit to clean the injector or replace it if clogged or malfunctioning.
• Reinstall the fuel injector ensuring a proper seal and reconnect any connectors.

5. Perform Compression Test

• If misfire persists, perform a compression test on cylinder 1.
• If the compression is low, further investigation into valve and piston condition is required.