how to fix P0174 code in Ford F-150 12th Generation (2009-2014)?

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal.
• Ensure the engine is cool before starting work.

2. Inspect and Repair the Air Intake System

1. Remove the air intake duct and inspect for cracks or loose connections.
2. Tighten or replace any loose clamps or damaged ducts as necessary.
3. Check the intake manifold gasket for leaks; replace if found defective.

3. Fuel System Check

1. Connect a fuel pressure gauge to the fuel rail.
2. Turn the ignition to the "ON" position without starting the engine and check the fuel pressure reading.
   • Replace the fuel pump if the pressure is below manufacturer specifications.
3. If pressure is adequate, proceed to inspect the fuel injectors for clogs.
4. Clean or replace any clogged injectors as necessary.

4. MAF Sensor Maintenance

1. Locate the MAF sensor in the air intake path.
2. Disconnect the wiring harness and remove the sensor.
3. Clean the MAF sensor using MAF cleaner; do not use other cleaners as they may damage the sensor.
4. Reinstall the MAF sensor and reconnect the wiring harness.

5. Reconnect and Test

1. Reconnect the negative battery terminal.
2. Start the engine and allow it to reach normal operating temperature.
3. Monitor the engine for any abnormal behavior or warning lights.