what does P0174 code mean for my Honda Civic 9th Generation (2012-2015)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.

2. Inspect and Repair Intake System

• Sub-steps:
  1. Visually inspect all intake hoses and connections for cracks or loose fittings.
  2. Tighten or replace any damaged hoses.
  3. Use a smoke machine to check for vacuum leaks if necessary.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from the air intake duct.
  2. Clean the sensor with MAF sensor cleaner (do not touch the sensor with fingers).
  3. Reinstall the MAF sensor securely.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (without starting the engine) and read the gauge.
  3. If the pressure is low, check the fuel pump and fuel filter; replace as necessary.

5. Inspect Throttle Body

• Sub-steps:
  1. Remove the throttle body from the intake manifold.
  2. Clean the throttle body with throttle body cleaner.
  3. Reinstall the throttle body, ensuring proper sealing with a new gasket.

6. Replace Oxygen Sensor (if necessary)

• Sub-steps:
  1. Locate the upstream oxygen sensor on the exhaust manifold.
  2. Disconnect the electrical connector and unscrew the sensor using an oxygen sensor socket.
  3. Install the new oxygen sensor, ensuring it is properly torqued to specification, and reconnect the electrical connector.