how to fix the P0174 code on my Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all intake hoses for cracks or damage.
  • Tighten any loose clamps.
  • Replace any damaged hoses or gaskets.
• Tools Required: Pliers, screwdriver set.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Disconnect the MAF sensor wiring harness.
  • Remove the MAF sensor using a Torx or Phillips screwdriver.
  • If cleaning, spray MAF cleaner on the sensor elements and let it dry; if replacing, install the new sensor.
  • Reinstall the MAF sensor and reconnect the wiring harness.
• Tools Required: Torx or Phillips screwdriver, MAF cleaner.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  • Attach a fuel pressure gauge to the fuel rail test port.
  • Turn the ignition to the "ON" position to check pressure without starting the engine.
  • Compare the reading to manufacturer specifications; if low, inspect the fuel pump and filter.
  • If necessary, replace the fuel pump or filter as indicated.
• Tools Required: Fuel pressure gauge, socket set.

5. Inspect Vacuum Lines

• Sub-steps:
  • Trace and inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
  • Replace any damaged lines.
• Tools Required: Visual inspection.