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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical shorts.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses for cracks or disconnections.
  • Use a smoke machine or propane torch (without flame) to identify leaks.
  • Replace any damaged hoses or gaskets as needed.
• Tools Required:
  • Smoke machine or propane torch
  • Various sizes of vacuum hose
• Safety Warnings:
  • Ensure engine is off when inspecting hoses.

3. Clean the Mass Air Flow Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake duct.
  • Carefully remove the sensor.
  • Spray MAF cleaner onto the sensor element and allow it to dry completely before reinstallation.
• Tools Required:
  • MAF sensor cleaner
  • Screwdriver set
• Safety Warnings:
  • Avoid touching the sensor element with fingers.

4. Check Fuel System

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail and turn the ignition on (do not start the engine) to check pressure.
  • If pressure is low, inspect the fuel pump and filter for blockages or failures.
  • Replace the fuel filter if it is clogged, and consider replacing the fuel pump if necessary.
• Tools Required:
  • Fuel pressure gauge
  • Wrench set
• Safety Warnings:
  • Release fuel pressure before disconnecting any lines.

5. Inspect Oxygen Sensors

• Sub-steps:
  • Locate the upstream and downstream oxygen sensors.
  • Use a multimeter to check the voltage output; it should fluctuate between 0.1V and 0.9V.
  • Replace any faulty sensors.
• Tools Required:
  • Multimeter
  • Oxygen sensor socket
• Safety Warnings:
  • Allow the exhaust system to cool before handling sensors.