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

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool if it has been running.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses and connections for cracks or disconnections.
  • Use a smoke machine or propane torch (without igniting) to identify leaks.
  • Replace any damaged hoses or gaskets.
• Tools Required: Smoke machine (optional), basic hand tools.

3. Test and Clean MAF Sensor

• Sub-steps:
  • Locate the MAF sensor (usually between the air filter and throttle body).
  • Disconnect the electrical connector and remove the sensor.
  • Clean the MAF sensor with MAF cleaner and let it dry.
  • Reinstall the sensor and reconnect the electrical connector.
• Tools Required: Torx or socket set, MAF cleaner.

4. Check Fuel Pressure

• Sub-steps:
  • Attach a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the ON position without starting the engine to check for proper fuel pressure.
  • Compare the reading to the specifications (usually around 40-50 psi).
  • If pressure is low, inspect the fuel pump and fuel filter for issues.
• Tools Required: Fuel pressure gauge.

5. Inspect Fuel Injectors

• Sub-steps:
  • Remove the engine cover for access.
  • Inspect connectors and wiring for damage.
  • If necessary, clean the fuel injectors using a dedicated fuel injector cleaner.
  • Reinstall the injectors and ensure proper connections.
• Tools Required: Basic hand tools, fuel injector cleaner.

6. Reconnect Battery and Clear Codes

• Sub-steps:
  • Reconnect the negative battery terminal.
  • Use the OBD-II scanner to clear the P0174 code.
• Tools Required: OBD-II scanner.