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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Disconnect the negative battery terminal to prevent electrical shorts and ensure safety.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket.
2. Disconnect the ignition coil connector on cylinder 1.
3. Remove the ignition coil by unscrewing the bolts and pulling it out gently.
4. Using a spark plug socket, remove the old spark plug.
5. Inspect the spark plug for wear; if it appears damaged, replace it with a new one (OEM recommended).
6. Apply anti-seize compound on the threads of the new spark plug and torque it to the manufacturer’s specifications (usually around 22 lb-ft).
7. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil

1. If the spark plug replacement does not resolve the issue, inspect the ignition coil closely for cracks or damage.
2. If faulty, remove the ignition coil and replace it with a new OEM unit.
3. Reconnect the ignition coil connector and ensure a secure fit.

4. Clean or Replace Fuel Injector

1. If misfire persists, clean the fuel injector using a fuel injector cleaning kit, following the manufacturer’s instructions.
2. If cleaning does not resolve the issue, remove the fuel injector from cylinder 1.
3. Replace the injector with an OEM part if it is clogged or not functioning.

5. Compression Test

1. Perform a compression test on cylinder 1 to check for engine health.
2. If compression is below specification (typically around 150 psi), further engine diagnostics may be required, indicating potential internal engine issues.