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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety during electrical work.
• Allow the engine to cool before working on any components.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover (if applicable) to access the spark plugs.
• Using the spark plug socket, remove the spark plug from cylinder 2.
• Inspect the old spark plug for wear or damage; replace if necessary.
• Install the new spark plug and torque it to the manufacturer's specification (usually around 15-20 Nm).
• Reinstall the engine cover.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove the bolt securing the ignition coil and lift it out.
• Install the new ignition coil and secure it with the bolt; torque to manufacturer's specification.
• Reconnect the electrical connector.

4. Inspect Fuel Injector

• Tools Required: Noid light or multimeter
• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check if the injector is receiving the correct signal. If using a multimeter, check for continuity.
• Replace the fuel injector if it does not function correctly.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading; compare it to the manufacturer's specifications.
• If the compression is low, further investigation into piston rings or valves may be needed.