how to fix P0174 code in Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before working on the intake system.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum lines and hoses for cracks, breaks, or loose connections.
  2. Use a smoke machine or carb cleaner to check for leaks around the intake manifold and hoses.
  3. Replace any damaged hoses or reattach loose connections.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver
• Sub-steps:
  1. Remove the MAF sensor from the intake duct.
  2. Spray MAF cleaner onto the sensor elements, avoiding touching them.
  3. Allow the sensor to dry completely before reinstalling. If damaged, replace the MAF sensor.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail test port and connect the fuel pressure gauge.
  2. Turn the ignition to the "On" position without starting the engine and check the pressure.
  3. Compare the reading to the specifications in the repair manual. If low, inspect the fuel pump, filter, and injectors.
  4. Replace components as necessary.

5. Clear Codes and Test Drive

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0174 code from the system.
  3. Test drive the vehicle under various conditions to monitor performance.