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

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses and connections for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify leaks in the intake manifold.
  3. Replace any damaged hoses or gaskets found during inspection.
• Tools Required: Smoke machine, carburetor cleaner, hose clamps.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the MAF sensor connector.
  3. Remove the MAF sensor from the housing.
  4. Clean the sensor with MAF cleaner and let it dry completely before reinstalling.
  5. Reconnect the MAF sensor and ensure it is securely mounted.
• Tools Required: MAF cleaner, screwdriver.

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

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure.
  3. If pressure is below specifications (check manufacturer specs), replace the fuel pressure regulator.
  4. Reconnect all lines and clear any codes with the OBD-II scanner.
• Tools Required: Fuel pressure gauge, socket set.

5. Clean or Replace Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail assembly to access the fuel injectors.
  2. Inspect the injectors for clogs or leaks visually.
  3. Clean the injectors using a fuel injector cleaner or replace them if cleaning does not resolve issues.
  4. Reinstall the fuel rail assembly and reconnect all hoses and electrical connectors.
• Tools Required: Socket set, fuel injector cleaner.