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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before proceeding.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. With the engine off, visually inspect all vacuum hoses for cracks or loose connections.
  2. Use a smoke machine or carburetor cleaner to detect leaks by applying it around the intake manifold and vacuum hoses while the engine is running.
  3. Replace any damaged hoses or seal leaks with appropriate sealant or gaskets.

3. Check and Clean the MAF Sensor

• Tools Required: MAF cleaner
• Sub-steps:
  1. Locate the MAF sensor in the air intake path.
  2. Disconnect the electrical connector.
  3. Remove the sensor from the housing by unscrewing it carefully.
  4. Spray the MAF cleaner onto the sensor element and let it dry completely before reinstallation.
  5. Reinstall the sensor and reconnect the electrical connector.

4. Test and Replace Fuel Pressure Regulator (if necessary)

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Attach the fuel pressure gauge to the fuel rail test port.
  2. Turn on the ignition without starting the engine and check the pressure reading.
  3. If the pressure is below specifications, replace the fuel pressure regulator or the fuel pump if needed.

5. Inspect and Clean Fuel Injectors

• Tools Required: Injector cleaning kit or ultrasonic cleaner
• Sub-steps:
  1. Remove the fuel rail and injectors from the engine.
  2. Use an injector cleaning kit or ultrasonic cleaner to clean each injector thoroughly.
  3. Reinstall the injectors, ensuring proper seating and connection.