my BMW 5 Series G30/G31 (2017-2024) has a P0301 code what should I do

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Ignition Components

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector for cylinder 1.
• Remove the ignition coil using a socket wrench.
• Inspect the spark plug in cylinder 1; replace it if worn or fouled.
• Install a new spark plug with a torque specification of 18 ft-lbs.
• Reinstall the ignition coil, ensuring it clicks into place and reconnect the connector.

3. Inspect and Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel injector using a puller tool if necessary.
• Test the injector with a multimeter to ensure proper resistance (typically around 12-16 ohms).
• Clean or replace the fuel injector as needed, making sure O-rings are properly lubricated with engine oil during reinstallation.
• Reconnect the fuel injector and ensure a secure fit.

4. Perform Compression Test

• Remove the spark plug from cylinder 1.
• Insert a compression gauge into the spark plug hole.
• Crank the engine for several seconds and note the reading. A healthy cylinder should show between 120-200 psi.
• If the compression is low, further diagnostics may be necessary for internal engine issues.

5. Check for Vacuum Leaks

• Inspect the intake manifold gaskets and vacuum lines for any signs of wear or damage.
• Use a smoke machine or carburetor cleaner to identify any leaks around the intake manifold.
• Repair or replace any faulty components found during the inspection.