how to fix P0171 code on my Ford F-150 13th Generation (2015-2020)

Learn how to diagnose and fix P0171 lean fuel condition in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool if it has been running.

2. Inspect and Repair Air Intake

• Tools Required: Socket set, vacuum gauge
• Remove the air intake duct and visually inspect for cracks or loose connections.
• Check all vacuum hoses for leaks. Replace any damaged hoses.
• Reinstall the air intake duct securely.

3. Clean the MAF Sensor

• Tools Required: MAF sensor cleaner (do not use other cleaners)
• Locate the MAF sensor in the air intake system.
• Carefully disconnect the MAF sensor connector.
• Spray the MAF sensor with the cleaner and let it dry completely.
• Reconnect the MAF sensor and ensure it is secured.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel rail and attach the fuel pressure gauge.
• Turn the ignition to the "on" position (do not start the engine) and check the fuel pressure reading.
• Compare the reading to manufacturer specifications. If low, check the fuel pump and filter for issues.

5. Inspect and Clean the Throttle Body

• Tools Required: Throttle body cleaner, rag
• Remove the air intake duct to access the throttle body.
• Open the throttle plate and spray the cleaner inside to remove carbon deposits.
• Wipe clean with a rag and ensure no debris falls into the intake manifold.
• Reinstall the air intake duct securely.

6. Test Drive and Clear Codes

• Reconnect the negative battery terminal.
• Start the engine and check for smooth operation.
• Take the vehicle for a test drive to ensure proper performance.
• Use the OBD-II scanner to clear the P0171 code and monitor for reoccurrence.