how to fix P0174 fuel system too lean on Honda Pilot YF4 (2023-Present)

Solution

1. Preparation

• Gather tools and parts needed. Ensure the vehicle is parked on a flat surface.
• Disconnect the battery to prevent any electrical short circuits.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections. Replace any damaged hoses.
  3. Check the intake manifold gasket for leaks and replace if necessary.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Remove the MAF sensor using the appropriate socket.
  4. Clean the MAF sensor with MAF cleaner spray. Allow it to dry completely.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test and Repair Fuel System

• Sub-steps:
  1. Use a fuel pressure gauge to check the fuel pressure at the fuel rail.
  2. If the pressure is below specifications, check the fuel filter and replace it if clogged.
  3. Inspect the fuel injectors for clogs; use a fuel injector cleaning kit if necessary.
  4. If the fuel pump is faulty, replace it according to the vehicle’s service manual.

5. Reconnect Battery

• After completing repairs, reconnect the battery terminals and ensure they are tight.