how to fix P0174 code in Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety during repairs.

2. Inspect and Replace Air Intake Components

• Tools Required: Socket set, screwdriver set, vacuum gauge
• Inspect the air intake duct and connections for any leaks or cracks.
  • Tighten or replace any loose or damaged fittings.
  • Test for vacuum leaks using a vacuum gauge; if leaks are found, repair as needed.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, torque wrench
• Remove the MAF sensor from the air intake.
  • Use MAF sensor cleaner to clean the element. Allow it to dry completely before reinstalling.
  • If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Check Fuel System

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
  • Turn the ignition key to the "ON" position without starting the engine and check the fuel pressure. It should meet manufacturer specifications (usually around 30-40 psi).
  • If pressure is low, inspect and replace the fuel pump or filter as necessary.

5. Inspect and Replace Oxygen Sensors

• Tools Required: O2 sensor socket, torque wrench
• Check the functionality of the bank 2 oxygen sensor using a multimeter.
  • If found faulty, remove the oxygen sensor and replace it with a new one, ensuring to torque it to the manufacturer's specification (usually around 30 lb-ft).

6. Reset the ECM

• Reconnect the negative battery terminal.
• Use an OBD-II scanner to clear the P0174 code from the ECM.
• Test drive the vehicle to ensure the code does not return.