how to diagnose Skoda Octavia NFL (2020-Present) with P0302 misfire code

Learn how to diagnose and fix P0302 cylinder 2 misfire in Skoda Octavia NFL. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid any electrical short circuits.

2. Inspect and Replace Ignition Components

• Inspections:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connector from cylinder 2.
  3. Unscrew the ignition coil and remove it.
  4. Check for cracks, corrosion, or signs of arcing. Replace it if damaged.
• Replacement:
  1. Install a new ignition coil and securely fasten it.
  2. Reconnect the ignition coil connector.

3. Inspect and Replace Spark Plug

• Remove Spark Plug:
  1. Use a spark plug socket to remove the spark plug from cylinder 2.
  2. Inspect for wear, carbon deposits, or damage.
• Replace:
  1. If necessary, replace with a spark plug that meets OEM specifications.
  2. Tighten to the manufacturer’s specified torque (typically around 20 Nm).

4. Check Fuel Injector

• Inspect Injector:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Remove the injector using a fuel injector puller or appropriate tool.
  3. Inspect for clogs or damage.
• Replace or Clean:
  1. If defective, install a new injector.
  2. If cleaning, use an ultrasonic cleaner and reinstall.

5. Compression Test

• Perform Test:
  1. Remove the spark plug and throttle body (if necessary) to access cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and note the pressure reading.
• Diagnosis:
  • Compare with manufacturer specifications. Low readings may indicate internal engine problems.