what does code P0301 mean for my BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather tools and parts required for repairs.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Use a spark plug socket to remove the spark plug from Cylinder 1.
• Inspect the spark plug for signs of wear, fouling, or damage (replace if necessary).
• Install a new spark plug, torque it to manufacturer specifications (typically 18-22 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil on Cylinder 1.
• Remove the ignition coil using a socket wrench.
• Install a new ignition coil, ensuring it is seated correctly.
• Reconnect the electrical connector.

4. Test Fuel Injector

• Disconnect the fuel injector connector for Cylinder 1.
• Use a multimeter to test for proper resistance (consult manufacturer specifications).
• If faulty, replace the fuel injector with a new one, ensuring proper sealing.

5. Compression Test

• Remove spark plugs from all cylinders for an accurate test.
• Insert a compression gauge into Cylinder 1 and crank the engine.
• Compare results to manufacturer specifications (typically around 140-200 psi).
• If compression is low, further investigation into piston rings or valves may be required.