how to fix P0302 code on my BMW X3 G01 (2018-2024)

Solution

1. Preparation

• Gather tools: OBD-II scanner, spark plug socket, multimeter, compression gauge, basic socket set, torque wrench.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2 by unscrewing it and gently pulling it out.
• Use a spark plug socket to remove the spark plug from cylinder 2.
  • Torque Specification: Refer to the vehicle’s manual for the correct torque specification for reinstalling the spark plug.
• Inspect the spark plug for signs of wear, fouling, or damage. Replace if necessary.
• Install a new spark plug, ensuring the gap is set correctly as per manufacturer specifications.

3. Check and Replace Ignition Coil

• Inspect the ignition coil removed from cylinder 2 for signs of cracks or damage.
• If faulty, replace it with a new ignition coil compatible with the BMW X3 G01.
• Reinstall the ignition coil and ensure it is seated properly.

4. Test and Replace Fuel Injector (if necessary)

• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check the resistance of the injector; it should be within the manufacturer's specified range.
• If the injector is faulty, replace it with a new one.
• Reconnect the fuel injector and ensure it is securely seated.

5. Perform Compression Test

• Remove the spark plug for cylinder 2 again.
• Insert a compression gauge into the spark plug hole and crank the engine.
• Compare the compression reading with the manufacturer's specifications.
• If compression is low, further investigation into the engine's internals may be required.