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

Solution

1. Preparation

• Tools Required: OBD-II scanner, vacuum gauge, fuel pressure gauge, MAF sensor cleaner, socket set.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Use a vacuum gauge to check for proper vacuum levels.
  2. Visually inspect all vacuum hoses for signs of wear, cracks, or disconnections.
  3. Replace any damaged or worn vacuum hoses with new ones.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor, which is usually positioned between the air filter and throttle body.
  2. Remove the MAF sensor from the air intake duct.
  3. Use MAF sensor cleaner to gently clean the sensor elements; do not touch the sensor with your hands.
  4. Reinstall the MAF sensor, ensuring it is securely connected.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  1. Attach a fuel pressure gauge to the fuel rail's test port.
  2. Turn on the ignition (without starting the engine) to check the fuel pressure.
  3. Compare the reading to manufacturer specifications (typically around 50-60 psi).
  4. If pressure is low, inspect the fuel pump and fuel filter for issues. Replace as necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the injectors.
  2. Inspect each injector for proper operation and signs of leakage.
  3. Clean or replace faulty injectors.

6. Final Assembly

• Reconnect all components removed during the repair.
• Reconnect the negative battery terminal.