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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative terminal of the battery.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector and unscrew the ignition coil from cylinder 1.
• Remove the old spark plug using a spark plug socket.
• Install the new spark plug and torque to the manufacturer's specification (typically around 18-22 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench
• If the ignition coil is faulty, remove it from cylinder 1.
• Install the new ignition coil and torque to the manufacturer's specification (typically around 7-9 lb-ft).
• Reconnect the ignition coil connector.

4. Inspect/Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, safety goggles
• Disconnect the fuel line and electrical connector from the fuel injector for cylinder 1.
• Remove the fuel injector from its rail.
• Inspect the injector for clogs or damage. Replace if necessary.
• Install the new fuel injector and reconnect the fuel line and electrical connector.

5. Compression Test (if necessary)

• Tools Required: Compression gauge
• Remove spark plug from cylinder 1.
• Insert the compression gauge into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the reading to the manufacturer's specifications. If low, further mechanical inspection may be necessary.