how to fix P0174 code in Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses for cracks or disconnections.
  • Use a smoke machine or carb cleaner to locate any leaks.
  • Replace any damaged hoses or gaskets found during inspection.

3. Check and Clean MAF Sensor

• Sub-steps:
  • Locate the MAF sensor on the air intake duct.
  • Carefully disconnect the electrical connector.
  • Remove the MAF sensor using a Torx screwdriver.
  • Clean the MAF sensor with MAF cleaner spray and allow it to dry.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition key to the “ON” position (do not start the engine) to prime the fuel system and check the pressure.
  • Compare the reading with manufacturer specifications; if low, inspect the fuel pump and filter.

5. Inspect Fuel Injectors

• Sub-steps:
  • Access the fuel injectors by removing the intake manifold if necessary.
  • Inspect for signs of clogs or leaks; use a multimeter to check their resistance.
  • Clean or replace faulty fuel injectors.

6. Reassemble and Clear Codes

• Sub-steps:
  • Reassemble any components removed during the repair.
  • Reconnect the negative battery terminal.
  • Use the OBD-II scanner to clear the P0174 code and any other stored codes.