how to fix P0174 code in Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

• Gather tools and parts. Disconnect the battery before starting any work.
• Tools Required: OBD-II scanner, vacuum gauge, fuel pressure gauge, multimeter, socket set, cleaning solvent, MAF cleaner, torque wrench.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses in the intake system for cracks or disconnections.
  • Use a vacuum gauge to test the intake manifold vacuum. If the reading is lower than normal, locate the source of the leak.
  • If any damaged hoses are found, replace them with OEM parts.

3. Check and Clean the MAF Sensor

• Sub-steps:
  • Locate the MAF sensor, usually situated between the air filter and throttle body.
  • Carefully disconnect the electrical connector and remove the MAF sensor.
  • Clean the MAF sensor with MAF cleaner. Allow it to dry completely before reinstalling.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Sub-steps:
  • Connect the fuel pressure gauge to the fuel rail according to the manufacturer’s specifications.
  • Turn the ignition on without starting the engine to check the fuel pressure. It should meet the specifications in the service manual (typically around 40-50 psi for Honda).
  • If pressure is low, check the fuel pump and filter for issues, and replace if necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  • Remove the engine cover (if applicable) and access the fuel injectors.
  • Visually inspect the injectors for leaks and ensure connections are secure.
  • If necessary, use a fuel injector cleaning kit to clean the injectors or replace them if they are faulty.