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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses and connections around the intake manifold for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify leaks by spraying around suspected areas and watching for changes in RPM.
  3. Replace any damaged hoses or gaskets found during the inspection.

3. Clean the MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the electrical connector and remove the MAF sensor.
  3. Spray the MAF sensor with MAF cleaner and allow it to dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail and attach the fuel pressure gauge to the Schrader valve.
  2. Turn the ignition key to the "ON" position (without starting the engine) to check the fuel pressure.
  3. Compare the reading to the manufacturer specifications (typically around 30-50 psi).
  4. If pressure is low, check the fuel pump and fuel filter for proper function.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail with injectors attached (ensure no fuel is leaking).
  2. Check for clogs or leaks in each injector.
  3. Clean or replace any injectors that show signs of blockage or damage.
  4. Reinstall the fuel rail and ensure all connections are secure.

6. Replace Oxygen Sensors (if necessary)

• Sub-steps:
  1. Identify the oxygen sensors on Bank 2 (usually the downstream sensor).
  2. Disconnect the electrical connector and remove the sensor using an oxygen sensor socket.
  3. Install the new oxygen sensor, applying anti-seize compound to the threads if required.
  4. Reconnect the electrical connector.