how to fix P0171 code in Honda Pilot YF4 (2023-Present)

Solution

1. Preparation

• Gather tools and materials.
• Disconnect the negative battery terminal.

Tools Required:

• OBD-II scanner
• Fuel pressure gauge
• Multimeter
• Screwdrivers
• Socket set
• Carburetor cleaner
• Torque wrench

2. Inspect and Repair Air Intake System

1. Visual Inspection:

   • Examine all hoses and connections for cracks or loose fittings.
   • Tighten any loose clamps.

2. Repair or Replace Components:

   • Replace any damaged hoses or gaskets found during inspection.
   • Ensure the intake manifold is properly sealed and torque to manufacturer specifications.

3. Clean or Replace MAF Sensor

1. Remove MAF Sensor:

   • Disconnect the electrical connector.
   • Unbolt the MAF sensor from the air intake duct.

2. Clean MAF Sensor:

   • Use MAF sensor cleaner to spray the sensing elements.
   • Allow it to dry completely before reinstalling.

3. Reinstall MAF Sensor:

   • Bolt the MAF sensor back into place and reconnect the electrical connector.

4. Fuel System Check

1. Check Fuel Pressure:

   • Connect the fuel pressure gauge to the fuel rail.
   • Turn the ignition to the ON position (do not start) and check the pressure against specifications.
   • If low, check the fuel pump and fuel filter for issues.

2. Inspect Fuel Injectors:

   • Remove the fuel rail while ensuring you relieve fuel pressure first.
   • Inspect and clean injectors as needed or replace them if malfunctioning.

5. Final Checks

• Reconnect the negative battery terminal.
• Clear the error codes using the OBD-II scanner.