how to fix the P0302 code for my Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, and fuel pressure gauge.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect and Replace Spark Plug and Ignition Coil

1. Remove the engine cover (if applicable) using a socket set.
2. Locate and remove the ignition coil from cylinder 2:
   • Disconnect the electrical connector.
   • Unbolt the coil using the socket set.
3. Inspect the spark plug:
   • Remove the spark plug using a spark plug socket.
   • Check for wear, fouling, or damage.
4. Replace the spark plug if necessary, using the correct torque specification (typically 22 lb-ft for Volkswagen).
5. Install the new ignition coil:
   • Position the coil in place and bolt it down.
   • Reconnect the electrical connector.

3. Check for Vacuum Leaks

1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
2. Use a smoke machine or carburetor cleaner to detect leaks while the engine is running.

4. Perform Compression Test

1. Remove the spark plug from cylinder 2.
2. Insert a compression tester into the spark plug hole and crank the engine.
3. Record the compression reading and compare it to the manufacturer's specifications (usually around 150-200 psi).
4. If the compression is low, further investigation into engine internals may be required.

5. Test Fuel Injector

1. Disconnect the fuel injector connector for cylinder 2.
2. Use a multimeter to check for proper voltage at the connector while cranking the engine.
3. If voltage is present, test the injector using a noid light or swap it with another cylinder to see if the misfire follows the injector.

6. Check Fuel Pressure

1. Connect a fuel pressure gauge to the fuel rail.
2. Turn the ignition to the "on" position (without starting) and check the fuel pressure.
3. Compare the reading to the specification (typically around 50-60 psi). If low, inspect the fuel pump and filter.