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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on any components.

2. Inspect Air Intake System

• Sub-steps:
  1. Visually inspect all vacuum lines and hoses for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify any vacuum leaks.
  3. Replace any damaged hoses or gaskets found during inspection.

3. Clean MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  1. Disconnect the MAF sensor connector and remove the sensor from the air intake duct.
  2. Spray the MAF sensor with the cleaner, avoiding touching the sensor elements.
  3. Allow the sensor to dry completely before reinstalling it.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (do not start) and check the pressure reading.
  3. Compare the reading to manufacturer specifications (typically around 40-50 psi).
  4. If pressure is low, inspect the fuel pump and filter; replace as necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel injectors from the fuel rail.
  2. Use a multimeter to test each injector for resistance (typically 12-16 ohms).
  3. Clean or replace any injectors that are clogged or outside of specifications.

6. Check Throttle Body

• Sub-steps:
  1. Remove the throttle body from the intake manifold.
  2. Clean the throttle plate and bore using throttle body cleaner and a soft cloth.
  3. Reinstall the throttle body with new gaskets if necessary.