how to fix P0174 code in Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on the electrical components.
• Allow the engine to cool before starting any work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver
• Inspect all vacuum hoses connected to the intake manifold for cracks or loose connections.
• Use the vacuum gauge to check for proper vacuum readings; if the reading is lower than normal, identify and replace any damaged hoses.
• Tighten any loose connections or replace damaged gaskets.

3. Check and Clean MAF Sensor

• Tools Required: MAF cleaner, soft cloth
• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector and remove the sensor from the duct.
• Clean the sensor using MAF cleaner and a soft cloth; allow it to dry completely before reinstalling.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail service port.
• Turn the ignition to the "ON" position without starting the engine to check the fuel pressure.
• Compare the reading with the manufacturer's specifications; if pressure is low, inspect the fuel pump and filter for issues.

5. Inspect and Replace Oxygen Sensors (if needed)

• Tools Required: O2 sensor socket, wrench
• Locate the oxygen sensors on bank 2, typically located in the exhaust system.
• Disconnect the electrical connector and use an O2 sensor socket to remove the sensor.
• Inspect and replace the sensor if it appears faulty or contaminated.
• Reinstall the new oxygen sensor and reconnect the electrical connector.