how to fix the P0301 code in my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather all necessary tools and parts before starting.
• Disconnect the negative battery terminal to prevent electrical shock.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Fuel injector cleaning kit (if needed)

2. Inspect and Replace Spark Plug

1. Remove the ignition coil cover if necessary.
2. Disconnect the ignition coil connector and unbolt the ignition coil.
3. Remove the spark plug using a spark plug socket.
4. Inspect the spark plug for wear; replace it if it appears fouled or worn.
5. Install a new spark plug and torque it to the manufacturer's specification (typically around 20 Nm / 15 lb-ft).
6. Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil

1. If the spark plug appears fine, test the ignition coil using a multimeter to check for resistance.
2. If faulty, remove the ignition coil and replace it with a new one.
3. Reconnect the ignition coil connector and ensure it is seated properly.

4. Test and Clean Fuel Injector

1. Remove the fuel injector connector from cylinder 1.
2. Use a fuel injector cleaning kit to clean the injector or replace it if it is clogged or malfunctioning.
3. Reinstall the fuel injector and reconnect the electrical connector.

5. Compression Test

1. If misfire persists, perform a compression test on cylinder 1.
2. Remove the spark plug and attach the compression tester to the spark plug hole.
3. Crank the engine and record the compression reading. It should typically be around 150 psi or higher.
4. If compression is low, further investigation into valve or piston issues may be needed.