how to fix P0301 code in my BMW X5 G05 (2019-2024)

Safety Warnings

• ⚠Safety Warnings:** Disconnect the battery before working on electrical systems. Allow the engine to cool before starting.
• ⚠Remove the engine cover if necessary.
• ⚠Disconnect the ignition coil connector for cylinder 1.
• ⚠Use a spark plug socket to remove the spark plug from cylinder 1.
• ⚠Inspect the old spark plug for wear and replace it with a new one, ensuring the gap is set to manufacturer specifications.
• ⚠Torque the new spark plug to the specified value (typically around 18-22 lb-ft).
• ⚠With the spark plug removed, inspect the ignition coil for signs of damage or corrosion.
• ⚠If faulty, remove the ignition coil by unbolting it and disconnecting the electrical connector.
• ⚠Install a new ignition coil, ensuring it’s properly seated and reconnect the electrical connector.
• ⚠Reinstall the engine cover if applicable.
• ⚠If the fuel injector is suspected to be clogged, consider using a fuel injector cleaning solution.
• ⚠If cleaning does not resolve the issue, remove the fuel injector for cylinder 1:
• ⚠Relieve fuel system pressure.
• ⚠Disconnect the fuel line and electrical connector.
• ⚠Remove the fuel injector using a fuel injector puller.
• ⚠Install a new or refurbished fuel injector and reconnect the fuel line and electrical connector.
• ⚠Reinstall the spark plug and ignition coil temporarily.
• ⚠Perform a compression test on cylinder 1 using the compression tester.
• ⚠Record the compression reading and compare it to the manufacturer's specifications (usually around 120-200 psi).
• ⚠If the compression is low, further investigation into piston rings or valves may be necessary.
• ⚠Clear the P0301 code using the OBD-II scanner.
• ⚠Start the engine and allow it to reach operating temperature.
• ⚠Check for the check engine light and monitor for any new codes.
• ⚠Perform a test drive to confirm the vehicle runs smoothly without misfires.
• ⚠Re-check fuel trims and monitor engine performance under load.
• ⚠Follow the manufacturer’s maintenance schedule for spark plug and ignition coil replacement.
• ⚠Use high-quality fuel to minimize carbon buildup.
• ⚠Regularly inspect and clean fuel injectors as part of routine maintenance.
• ⚠Address any vacuum or exhaust leaks promptly to prevent future misfires.