how to fix P0174 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Tools Required: OBD-II scanner, vacuum gauge, fuel pressure gauge, MAF sensor cleaner, basic hand tools.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect for Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses and connections for signs of wear, cracks, or disconnections.
  2. Use a smoke machine or propane torch (without lighting it) around the intake manifold and hoses to identify leaks.
  3. Replace any damaged vacuum hoses or gaskets.

3. Check Fuel Pressure

• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Connect the fuel pressure gauge to the test port.
  3. Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading against manufacturer specifications (approximately 40-50 psi for the Accord).
  4. If the pressure is low, inspect the fuel pump, fuel filter, and fuel lines for blockages or damage. Replace any faulty components.

4. 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. Clean the sensor with MAF sensor cleaner, holding it upright to avoid damage to the sensor elements.
  4. Reinstall the sensor and reconnect the electrical connector.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the engine cover if necessary to access the fuel injectors.
  2. Check for any signs of fuel leakage around the injectors.
  3. Use an injector cleaner or replace any clogged injectors as needed.
  4. Reassemble any removed components.