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

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps.
• Steps:
  1. Use the vacuum gauge to check for vacuum leaks in the intake system.
  2. Inspect all vacuum hoses and intake manifolds for cracks or disconnections.
  3. Replace any damaged hoses or gaskets as necessary, ensuring a proper seal.

3. Check and Replace Fuel Filter

• Tools Required: Socket set, fuel line disconnect tool.
• Steps:
  1. Locate the fuel filter, typically situated along the fuel line.
  2. Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
  3. Disconnect the fuel lines using the fuel line disconnect tool.
  4. Remove and replace the fuel filter with a new one, ensuring proper orientation.

4. Inspect and Clean Mass Air Flow (MAF) Sensor

• Tools Required: MAF cleaner or electronic cleaner, screwdriver.
• Steps:
  1. Locate the MAF sensor in the intake duct.
  2. Carefully disconnect the electrical connector from the MAF sensor.
  3. Remove the MAF sensor using the screwdriver.
  4. Clean the sensor using MAF cleaner and let it dry.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

5. Test and Replace Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket, multimeter.
• Steps:
  1. Use the multimeter to test the voltage output of the oxygen sensors while the engine is running.
  2. If readings are outside the manufacturer specifications, remove the faulty oxygen sensor using the O2 sensor socket.
  3. Install a new oxygen sensor and ensure it is properly connected.