how to fix P0174 code in BMW X5 G05 (2019-2024)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Air Intake Components

• Tools Required: Screwdrivers, socket set
• Remove the air intake duct and inspect for cracks or loose connections.
• Check the condition of the air filter and replace if necessary.
• Reinstall the intake duct and ensure all clamps are secure.

3. Clean or Replace Mass Airflow Sensor

• Tools Required: MAF cleaner, screwdriver
• Remove the MAF sensor from the air intake.
• Clean the sensor using MAF cleaner; allow it to dry completely before reinstalling.
• If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Test and Repair Fuel System

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition on (do not start the engine) and check the fuel pressure.
• If the pressure is low, inspect the fuel pump and replace if necessary.
• Check fuel injectors for proper operation and replace any that are clogged or leaking.

5. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket
• Check the wiring and connectors of the oxygen sensors for damage.
• If fault codes indicate a failed sensor, replace the affected oxygen sensor.

6. Clear Codes and Test Drive

• Use the OBD-II scanner to clear the P0174 code.
• Test drive the vehicle to ensure the check engine light does not re-illuminate and monitor performance.