how to fix P0302 code in BMW 5 Series F10/F11 (2010-2017)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure electrical safety.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter
• Noid light
• Basic hand tools

2. Replace Ignition Coil

1. Remove the engine cover (if applicable) to access the ignition components.
2. Disconnect the electrical connector from the ignition coil on cylinder 2.
3. Unbolt the ignition coil using a socket set and remove it from the cylinder head.
4. Install the new ignition coil, securing it with the bolts to the specified torque (typically about 10 Nm).
5. Reconnect the electrical connector to the ignition coil.

3. Replace Spark Plug

1. Using a spark plug socket, remove the spark plug from cylinder 2.
2. Inspect the removed spark plug for signs of wear or fouling.
3. Install a new spark plug, ensuring it is gapped correctly (typically around 0.032-0.036 inches).
4. Torque the spark plug to the manufacturer's specification (usually around 23 Nm).

4. Test Fuel Injector

1. Connect a noid light to the fuel injector connector of cylinder 2 to check for signal.
2. If no signal is detected, inspect the wiring and connectors for damage and repair as necessary.
3. If the injector is faulty, replace it by removing the fuel rail (if required) and installing a new injector.

5. Perform Compression Test

1. Remove the spark plug from cylinder 2 and insert the compression tester.
2. Crank the engine several times to obtain a reading.
3. Compare the compression reading to the manufacturer's specifications. If low, further investigation into cylinder damage or valve issues is needed.