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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester.
• Ensure the vehicle is parked on a level surface, the engine is cool, and the battery is disconnected for safety.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if necessary using a socket set.
2. Disconnect the ignition coil connector from the spark plug.
3. Remove the ignition coil by unscrewing it and pulling it out gently.
4. Remove the spark plug using a spark plug socket and inspect it for wear, fouling, or damage.
5. If the spark plug is worn, replace it with a new one, ensuring it has the correct gap as specified in the owner's manual.
6. Reinstall the ignition coil and connector.

3. Test and Replace Ignition Coil

1. Using a multimeter, check the resistance of the ignition coil; compare with specifications in the service manual.
2. If the ignition coil is faulty, replace it with a new one.
3. Reconnect the ignition coil and ensure it is secured properly.

4. Inspect and Clean Fuel Injector

1. Remove the fuel injector rail by loosening the retaining bolts.
2. Pull out the injector for cylinder 1, inspecting for clogs or damage.
3. Clean the injector using an appropriate cleaner or replace it if necessary.
4. Reinstall the fuel injector into the rail and secure it.

5. Check Compression

1. Insert a compression tester into the spark plug hole of cylinder 1.
2. Crank the engine several times to get a reading.
3. Compare the reading with specifications; if low, further engine diagnostics may be necessary.