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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting any work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to detect leaks during idle.
  3. Replace any damaged hoses or gaskets as necessary.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the MAF sensor from the air intake duct.
  3. Use MAF sensor cleaner to clean the sensor element carefully.
  4. Allow it to dry completely before reinstalling.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Clean Throttle Body

• Sub-steps:
  1. Remove the air intake duct from the throttle body.
  2. Use throttle body cleaner and a clean cloth to remove carbon buildup.
  3. Ensure the throttle plate moves freely and does not stick.
  4. Reinstall the air intake duct securely.

5. Fuel System Inspection

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition key to the "ON" position (do not start) and check the fuel pressure.
  3. Compare the reading to the manufacturer's specifications (usually around 40-50 psi).
  4. If the fuel pressure is low, inspect the fuel pump, filter, and relay for issues.