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

Solution

1. Preparation

• Gather tools and ensure the vehicle is parked on a level surface.
• Disconnect the battery to prevent any electrical shorts.
• Tools Required: OBD-II scanner, socket set, multimeter, compression tester, torque wrench.

2. Inspect and Replace Spark Plug

• Remove Engine Cover: Use a socket to remove any bolts securing the engine cover and lift it off.
• Remove Spark Plug: Use a spark plug socket to remove the spark plug from cylinder 2. Inspect for damage or fouling.
• Install New Spark Plug: Replace with a new spark plug (OEM recommended) and torque to manufacturer specifications (usually around 22 lb-ft).
• Reinstall Engine Cover: Secure the engine cover back in place.

3. Inspect and Replace Ignition Coil

• Remove Ignition Coil: Disconnect the electrical connector and remove the bolt securing the ignition coil for cylinder 2. Pull the coil out.
• Install New Ignition Coil: Install a new ignition coil and secure it with the bolt. Reconnect the electrical connector.

4. Check and Replace Fuel Injector (if necessary)

• Remove Fuel Rail: Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls. Disconnect the fuel lines and remove the fuel rail bolts.
• Inspect Fuel Injector: Remove the fuel injector from cylinder 2 and inspect for clogs or faults. Replace if necessary.
• Reinstall Fuel Rail: Ensure the injectors are securely seated and reinstall the fuel rail with new seals, tightening to manufacturer specifications.

5. Perform Compression Test (if misfires persist)

• Remove Spark Plug: Remove the spark plug for cylinder 2 again.
• Insert Compression Tester: Screw the compression tester into the spark plug hole.
• Crank Engine: Have an assistant crank the engine for a few seconds while observing the gauge. Record the compression reading.
• Reinstall Spark Plug: Reinstall the spark plug and ensure it is torqued.