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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, noid light.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Inspect and Replace Spark Plug

• Remove the engine cover if necessary.
• Using a socket set, remove the ignition coil from cylinder 1.
• Inspect the spark plug for wear or carbon buildup and replace it if damaged.
• Torque the new spark plug to the manufacturer’s specifications (typically 18-22 ft-lbs).

3. Check and Replace Ignition Coil

• While the ignition coil is removed, inspect it for cracks or damage.
• If faulty, install a new ignition coil, ensuring it is seated properly.
• Torque the ignition coil bolt to the manufacturer's specification (typically 10-12 ft-lbs).

4. Inspect Fuel Injector

• Using a noid light, connect it to the fuel injector harness for cylinder 1 to check for proper signal.
• If the injector is not firing, test it with a multimeter for resistance (typically 12-16 ohms).
• Replace the fuel injector if defective.

5. Compression Test

• Remove the spark plug from cylinder 1 and attach a compression tester.
• Crank the engine and record the compression reading; it should be within the manufacturer's specified range.
• If low, consider further investigation for potential internal engine issues.

6. Reassemble and Clear Codes

• Reinstall the ignition coil and spark plug.
• Reconnect the negative battery terminal.
• Start the engine and use the OBD-II scanner to clear the P0301 code.