how to fix P0302 misfire code in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, anti-seize compound
• Remove the ignition coil from cylinder 2:
  1. Disconnect the ignition coil connector.
  2. Remove the bolts securing the ignition coil.
  3. Gently pull the ignition coil out.
• Remove the spark plug from cylinder 2:
  1. Use a spark plug socket to unscrew the spark plug.
  2. Inspect the old spark plug for wear or damage.
• Install a new spark plug:
  1. Apply anti-seize compound to the threads of the new spark plug.
  2. Hand-tighten the spark plug, then use a torque wrench to tighten it to manufacturer specifications (typically around 22 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• If the ignition coil is faulty:
  1. Swap the ignition coil from cylinder 2 with one from a different cylinder.
  2. Reconnect the ignition coil connector and secure the coil in place.
• Test if the misfire code changes to another cylinder. If it does, replace the ignition coil with a new one and torque to specifications.

4. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector puller, O-ring grease
• If fuel injector issues are suspected:
  1. Remove the fuel rail assembly to access the fuel injectors.
  2. Carefully remove the fuel injector from cylinder 2.
  3. Inspect the old fuel injector for blockage or failure.
• Install a new fuel injector:
  1. Apply O-ring grease to the new injector O-rings.
  2. Insert the new injector into the fuel rail and secure it.
  3. Reinstall the fuel rail assembly.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and check for any leaks or abnormal noises.
• Clear the P0302 code using the OBD-II scanner.