how to fix P0174 code in Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cooled down.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum lines and connections for cracks or disconnections.
  • Use a smoke machine or carb cleaner to identify any leaks; spray around suspected areas and watch for RPM changes.
  • Replace any damaged vacuum hoses or gaskets as necessary.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake ducting.
  • Disconnect the electrical connector from the MAF sensor.
  • Remove the MAF sensor using a Torx or socket wrench.
  • Clean the sensor using MAF cleaner spray; do not touch the sensor element.
  • If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Verify Fuel Pressure

• Sub-steps:
  • Connect the fuel pressure gauge to the fuel rail test port.
  • Turn the ignition key to the "ON" position (do not start the engine) and check the pressure reading.
  • If the pressure is below specifications (usually around 40-50 PSI for Honda), inspect the fuel pump and filter for issues and replace as necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  • Remove the fuel rail from the engine, ensuring to relieve fuel pressure first.
  • Inspect the injectors for dirt or clogs; clean them with an injector cleaner or replace if necessary.
  • Reinstall the fuel rail and ensure all connections are secure.