how to fix P0301 misfire code in my Skoda Octavia NFL (2020-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Multimeter
• Compression tester
• Noid light (if checking fuel injector)

2. Inspect and Replace Ignition Components

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector and remove the ignition coil from cylinder 1.
3. Inspect the spark plug; if worn or fouled, replace it with a new one (use OEM specifications).
4. Reinstall the ignition coil and ensure the connector is secure. If the coil shows signs of damage, replace it.

3. Check Fuel Injector

1. Disconnect the fuel injector connector for cylinder 1.
2. Attach the noid light to the connector and crank the engine; the light should blink indicating injector operation.
3. If no signal, check wiring and replace the fuel injector if faulty.

4. Perform a Compression Test

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for several seconds and note the compression reading; it should be within the manufacturer's specification.
4. If compression is low, further investigation is needed for potential mechanical issues (e.g., valve problems, head gasket leaks).

5. Address Vacuum Leaks

1. Inspect all vacuum hoses and connections for any signs of damage or disconnection.
2. Use a smoke machine or spray soapy water around suspected areas while the engine is idling to identify leaks.
3. Repair or replace any faulty vacuum hoses.