how to fix P0174 code on BMW X5 F15 (2014-2019) for lean condition?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Remove the engine cover if necessary.
  • Visually inspect the intake duct, throttle body, and air filter for any obstructions or damage.
  • Replace any damaged hoses or seals in the air intake system.
• Tools Required: Screwdrivers, pliers, flashlight.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Disconnect the electrical connector from the MAF sensor.
  • Remove the MAF sensor from the air intake duct.
  • Clean the MAF sensor with MAF cleaner or replace it if damaged.
  • Reinstall the MAF sensor and reconnect the connector.
• Tools Required: Torx or socket set, MAF cleaner.

4. Check Fuel Pressure

• Sub-steps:
  • Locate the fuel pressure test port on the fuel rail.
  • Attach a fuel pressure gauge and turn the ignition to the "ON" position (do not start the engine) to check the pressure.
  • Compare the reading to the manufacturer's specifications; if low, check the fuel pump and fuel filter.
• Tools Required: Fuel pressure gauge.

5. Inspect for Vacuum Leaks

• Sub-steps:
  • Use a smoke machine or carburetor cleaner to check for vacuum leaks around the intake manifold and hoses.
  • If leaks are found, replace damaged gaskets or hoses.
• Tools Required: Smoke machine or carburetor cleaner, wrenches.