how to fix P0302 code in my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Remove the ignition coil using a socket wrench.
  4. Extract the spark plug using a spark plug socket and ratchet.
  5. Inspect the spark plug for wear, carbon buildup, or damage. Replace if needed.
  6. Install a new spark plug, torquing to the manufacturer's specification (typically around 20 Nm).
  7. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is in good condition, inspect the ignition coil for cracks or damage.
  2. If faulty, remove the ignition coil from cylinder 2 as previously described.
  3. Install a new ignition coil, ensuring it is seated properly.
  4. Reconnect the ignition coil connector.

4. Inspect and Test Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Remove the fuel injector using appropriate tools (may require fuel rail removal).
  3. Inspect the injector for clogs or damage. Clean or replace if necessary.
  4. Reinstall the fuel injector, ensuring a proper seal, and reconnect the connector.

5. Perform Compression Test (if necessary)

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert a compression gauge into the spark plug hole.
  3. Crank the engine and record the compression reading.
  4. Compare the reading to the manufacturer's specifications. If low, further investigation may be needed for internal engine issues.

Tools Required:

• OBD-II scanner
• Socket set
• Spark plug socket
• Ratchet
• Compression gauge
• Torque wrench
• Fuel injector removal tool (if necessary)

Parts Required:

• Spark plug (for cylinder 2)
• Ignition coil (if faulty)
• Fuel injector (if clogged or faulty)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow the engine to cool before performing any repairs to avoid burns.