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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug and Ignition Coil

1. Remove Engine Cover
   • Unscrew the bolts securing the engine cover and lift it off.
2. Access Cylinder 2 Ignition Coil
   • Locate the ignition coil on cylinder 2 (usually the second coil from the timing belt side).
   • Disconnect the electrical connector from the ignition coil.
3. Remove Ignition Coil
   • Unscrew the mounting bolt holding the ignition coil in place.
   • Gently pull the ignition coil out of the spark plug tube.
4. Replace Spark Plug
   • Use a spark plug socket to remove the old spark plug.
   • Inspect the old spark plug for wear or damage.
   • Install a new spark plug, using the manufacturer’s specified torque (typically around 22 ft-lbs).
5. Install New Ignition Coil
   • Insert the new ignition coil into the spark plug tube.
   • Secure it with the mounting bolt and reconnect the electrical connector.
6. Reinstall Engine Cover
   • Place the engine cover back and secure it with bolts.

3. Check and Replace Fuel Injector (if needed)

1. Remove Fuel Rail
   • Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
   • Disconnect the fuel lines and remove the bolts securing the fuel rail.
2. Replace Fuel Injector
   • Pull out the faulty fuel injector from cylinder 2.
   • Install a new fuel injector, ensuring proper seating and connection.
3. Reinstall Fuel Rail
   • Reattach the fuel rail to the engine, ensuring all connections are secure.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Spark plug socket
• Multimeter
• Compression tester

Parts Required:

• Spark plug (specific to vehicle specifications)
• Ignition coil (for cylinder 2)
• Fuel injector (for cylinder 2, if necessary)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect battery before working on electrical systems.
• Allow engine to cool before opening any components.