how to fix Honda Pilot YF4 (2023-Present) P0174 code?

Solution

1. Preparation

• Gather tools and parts needed.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Visually inspect all hoses connected to the air intake and intake manifold for cracks or loose connections.
  3. Tighten or replace any damaged hoses.
  4. Replace the intake manifold gasket if found to be leaking.

3. Check and Clean MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the intake duct.
  3. Spray MAF sensor cleaner on the sensing elements and allow it to dry.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Inspect Fuel System

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (do not start the engine) to check fuel pressure.
  3. Compare the reading with manufacturer specifications (typically around 40-50 psi).
  4. If pressure is low, check the fuel pump and fuel filter for issues and replace if necessary.

5. Examine and Test Oxygen Sensors

• Tools Required: Multimeter
• Sub-steps:
  1. Locate the oxygen sensors on the exhaust system.
  2. Disconnect the sensors' electrical connectors.
  3. Use a multimeter to test the voltage output of the sensors while the engine is running (typically should fluctuate between 0.1 to 0.9 volts).
  4. Replace any faulty sensors.