how to fix P0302 misfire code on Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector tester.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts during repairs.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using the socket set.
2. Disconnect the ignition coil connector for cylinder 2.
3. Remove the ignition coil using the socket set.
4. Unscrew the spark plug using a spark plug socket and ratchet.
5. Inspect the removed spark plug for damage or excessive wear; replace if necessary.
6. Install a new spark plug, ensuring the gap is set to manufacturer specifications (typically around 0.028 inches).
7. Reinstall the ignition coil and reconnect the electrical connector.
8. Replace the engine cover.

3. Replace Ignition Coil (if needed)

1. If the ignition coil was found faulty during diagnostics, remove it as described above.
2. Install a new ignition coil by reversing the removal steps.
3. Ensure the coil is seated correctly and the connector is secured.

4. Replace Fuel Injector (if needed)

1. Disconnect the fuel line (use caution and relieve fuel pressure beforehand).
2. Remove the intake manifold (if required) to access the fuel injector.
3. Disconnect the electrical connector from the fuel injector for cylinder 2.
4. Remove the fuel injector using the appropriate tool (typically a special injector puller).
5. Install the new fuel injector, ensuring proper seating and connection.
6. Reassemble any components removed during the process.

5. Check Compression (if misfire persists)

1. Remove the spark plug from cylinder 2 and install the compression tester.
2. Crank the engine to obtain a compression reading.
3. Compare the reading to manufacturer specifications (typically around 150-200 psi).
4. If compression is low, further diagnosis is needed to determine the cause.