how to fix P0174 code in Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool if it has been running.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver.
• Instructions:
  1. Use a vacuum gauge to check for leaks in the intake manifold and vacuum hoses.
  2. Inspect all rubber hoses for cracks or disconnections.
  3. Replace any damaged hoses or reattach loose connections.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver, safety goggles.
• Instructions:
  1. Locate the MAF sensor on the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using a screwdriver.
  3. Spray the MAF sensor with MAF cleaner and let it dry completely.
  4. Reinstall the sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Instructions:
  1. Connect the fuel pressure gauge to the fuel rail service port.
  2. Turn the ignition to the "ON" position (without starting the engine) and check the pressure reading.
  3. If the pressure is below specifications (check your service manual for the correct value), inspect the fuel pump and fuel filter for issues and replace if necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit, safety goggles.
• Instructions:
  1. Remove the fuel injectors from the fuel rail (ensure to relieve fuel pressure first).
  2. Use the cleaning kit to clean the injectors according to the manufacturer’s instructions.
  3. Reinstall the injectors and ensure all seals are intact.