how to fix P0174 code in BMW X3 G01 (2018-2024)

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, rubber gloves
• Use a vacuum gauge to check for leaks in the intake manifold and vacuum hoses.
• If leaks are found, replace damaged hoses or seals.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector and remove the sensor.
• Clean the sensor using MAF sensor cleaner, and allow it to dry.
• If damaged, replace the MAF sensor with a new one.

4. Test Fuel System

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position without starting the engine and check the fuel pressure.
• If the pressure is below specifications, inspect the fuel pump and replace if necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit or ultrasonic cleaner, protective eyewear
• Remove the fuel injectors from the engine.
• Clean the injectors using a fuel injector cleaning kit or ultrasonic cleaner.
• Reinstall the injectors, ensuring they are securely fitted.