what does it mean if my Volkswagen Passat B8 (2015-2022) has a P0302 code

Solution

1. Preparation

• Gather necessary tools: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, and fuel injector cleaning kit.
• Disconnect the battery before beginning any electrical work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  1. Unplug the electrical connector.
  2. Remove the bolts securing the ignition coil.
  3. Carefully pull out the ignition coil.
• Remove the spark plug using a spark plug socket:
  1. Turn counterclockwise to loosen.
  2. Inspect the spark plug for signs of wear or fouling.
• Install a new spark plug:
  1. Hand-tighten the new spark plug.
  2. Torque to the manufacturer's specification (typically around 30 Nm or 22 ft-lbs).

3. Inspect or Replace Ignition Coil

• If the ignition coil shows signs of damage or malfunction:
  1. Replace the ignition coil with a new one.
  2. Reinstall the ignition coil, ensuring it's seated properly.
  3. Reconnect the electrical connector.

4. Check Fuel Injector

• If the fuel injector is suspected to be faulty:
  1. Remove the fuel rail to access the injector.
  2. Inspect the injector for clogs or damage.
  3. Clean or replace the injector as necessary.
  4. Reinstall the fuel rail and ensure proper torque specifications.

5. Perform Compression Test (if necessary)

• If a misfire persists:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and note the compression reading.
  4. Compare to manufacturer specifications; if low, further engine diagnostics may be necessary.