how to fix P0174 code on Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before commencing work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine or carb cleaner to identify leaks around the intake manifold and hoses.
  3. Replace any damaged hoses or seals.
• Tools Required: Smoke machine, carb cleaner, hose clamps.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor's electrical connector.
  2. Remove the MAF sensor from the intake.
  3. Clean the sensor with MAF cleaner (avoid using other cleaners).
  4. Reinstall the MAF sensor and reconnect the electrical connector.
• Tools Required: MAF cleaner, screwdriver.

4. Check and Replace Fuel Filter (if necessary)

• Sub-steps:
  1. Locate the fuel filter and ensure the fuel system is depressurized.
  2. Disconnect the fuel lines carefully.
  3. Remove the old fuel filter and install the new one, ensuring correct orientation.
  4. Reconnect the fuel lines and check for leaks.
• Tools Required: Wrench set, fuel line disconnect tool.

5. Test Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition on (do not start) and check the pressure reading.
  3. Compare the reading with manufacturer specifications; replace the fuel pump if out of range.
• Tools Required: Fuel pressure gauge.