how to fix the P0301 code on my BMW X3 G01 (2018-2024)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to ensure safety during the repair.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the ignition coil from cylinder 1:
  1. Unplug the electrical connector from the ignition coil.
  2. Remove the mounting bolts and lift the ignition coil out.
• Remove the spark plug:
  1. Use the spark plug socket and ratchet to unscrew the spark plug from the cylinder head.
  2. Inspect the spark plug for wear; replace if necessary.
• Install the new spark plug:
  1. Hand-tighten the new spark plug, then use the torque wrench to tighten to the manufacturer’s specified torque (usually around 22 ft-lbs).

3. Replace Ignition Coil

• Tools Required: Ratchet, socket set
• Install the new ignition coil:
  1. Place the new ignition coil onto the spark plug and ensure it's seated properly.
  2. Reinstall the mounting bolts and tighten to the manufacturer's specifications.
  3. Reconnect the electrical connector to the ignition coil.

4. Test Fuel Injector

• Tools Required: Fuel injector tester or multimeter
• Remove the fuel injector for cylinder 1:
  1. Disconnect the electrical connector.
  2. Remove any retaining clips and pull the injector out.
• Test the injector's resistance:
  1. Use a multimeter to check the resistance; it should be within the specified range (typically 12-16 ohms).
  2. Replace the injector if it's outside this range.
• Reinstall the injector:
  1. Reconnect the electrical connector and secure it with the retaining clips.

5. Reassemble and Reconnect Battery

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle to ensure all systems are functioning correctly.