how to fix the check engine light on BMW X5 G05 (2019-2024) P0301?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool if it has been running.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap gauge.
• Remove the engine cover (if applicable) to access the spark plugs.
• Unscrew the spark plug from cylinder 1 using the socket set.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug, ensuring it is gapped correctly (refer to manufacturer's specifications).
• Torque the spark plug to the specified torque value (typically around 15-20 Nm).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter.
• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the ignition coil using the socket set.
• Test the ignition coil with a multimeter to confirm it meets resistance specifications.
• If faulty, replace with a new ignition coil and reconnect the electrical connector.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (optional), socket set.
• Remove the fuel injector for cylinder 1 from the fuel rail.
• Inspect for clogs or damage.
• Clean the injector using a fuel injector cleaning kit or replace it if necessary.
• Reinstall the injector and ensure it is seated correctly.

5. Verify Compression

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester and crank the engine.
• Record the compression reading and compare it to specifications.
• If the compression is low, further investigation is needed for potential internal engine issues.