my BMW X5 G05 (2019-2024) shows P0171 and P0174 codes what’s wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, socket set, flashlight.
• Sub-steps:
  1. Use a vacuum gauge to check for leaks in the intake manifold and associated hoses.
  2. Visually inspect all hoses for cracks or disconnections.
  3. Replace any damaged hoses or gaskets found during inspection.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, socket set.
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using a socket set.
  3. Clean the MAF sensor with MAF sensor cleaner or replace it if it's damaged.

4. Check and Repair Fuel System

• Tools Required: Fuel pressure gauge, socket set.
• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail to check for proper fuel pressure.
  2. If pressure is low, inspect the fuel pump and fuel filter for blockages or failures.
  3. Replace any faulty components (fuel pump, filter) as necessary.

5. Inspect Oxygen Sensor Functionality

• Tools Required: OBD-II scanner, multimeter (if necessary).
• Sub-steps:
  1. Use the OBD-II scanner to monitor oxygen sensor readings during idle and acceleration.
  2. If readings are erratic or out of range, replace the affected oxygen sensors.