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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect Spark Plug and Ignition Coil

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Disconnect the electrical connector from the ignition coil on cylinder 2.
  3. Remove the ignition coil using a socket wrench.
  4. Inspect the spark plug condition and replace it if worn or fouled.
  5. Reinstall the ignition coil and reconnect the electrical connector.
  6. Torque the ignition coil to the manufacturer's specifications.

3. Check for Vacuum Leaks

• Tools Required: Smoke machine (optional), or intake cleaner spray.
• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. If available, use a smoke machine to detect leaks around the intake manifold.
  3. Alternatively, spray intake cleaner around suspected areas while the engine is running; listen for changes in rpm that indicate a vacuum leak.

4. Perform Compression Test

• Tools Required: Compression tester.
• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine several times to get a reading.
  4. Record the compression value and compare it to specifications.
  5. Repeat for adjacent cylinders for reference.

5. Inspect Fuel Injector

• Tools Required: Multimeter, fuel injector cleaning kit.
• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Test the injector's resistance using a multimeter; compare to specifications.
  3. If the injector is faulty, replace it.
  4. Clean the injector using a fuel injector cleaning kit if necessary.

6. Reassemble and Test

• Reconnect the battery terminal.
• Start the engine and monitor for any check engine light and the smoothness of operation.