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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to avoid electrical issues.
• Ensure the engine is cool before starting the work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake duct for cracks or loose connections.
  2. Tighten any loose clamps and replace damaged hoses.
  3. Use a smoke machine to identify any vacuum leaks in the intake system.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the air intake duct.
  3. Clean the MAF sensor with MAF cleaner spray and let it dry.
  4. If the sensor is damaged, replace it with a new one and reconnect it.

4. Check Fuel Pressure

• 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 read the fuel pressure.
  3. Compare the reading to manufacturer specifications (typically around 40-50 psi).
  4. If low, check the fuel pump and fuel filter for issues.

5. Inspect PCV System

• Sub-steps:
  1. Locate the PCV valve and remove it from the valve cover.
  2. Shake the PCV valve; it should rattle indicating it's functional.
  3. If it does not rattle or is clogged, replace it with a new valve.

6. Test and Clean Fuel Injectors

• Sub-steps:
  1. Use a fuel injector cleaning kit to clean the injectors.
  2. If cleaning does not restore function, consider replacing any faulty injectors.

Tools Required:

• OBD-II scanner
• Screwdrivers
• Pliers
• Fuel pressure gauge
• MAF sensor cleaner
• Smoke machine (for leak detection)
• Fuel injector cleaning kit

Parts Required:

• Mass airflow (MAF) sensor (if needed)
• PCV valve (if needed)
• Fuel filter (if needed)
• Fuel injectors (if needed)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow the engine to cool before opening any components.
• Be cautious when working with fuel systems to avoid fire hazards.