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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface with the engine cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, and a flashlight.
• Sub-steps:
  1. Use the vacuum gauge to check for leaks in the air intake system.
  2. Visually inspect all hoses and gaskets for wear or damage.
  3. Replace any damaged hoses or gaskets.
  4. Reconnect all components securely.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the sensor with MAF cleaner spray, following the product instructions.
  4. If damaged, replace the MAF sensor with a new one.
  5. Reinstall the sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition on (do not start) and check the pressure reading.
  3. If the pressure is below specifications, check the fuel pump and filter.
  4. Replace the fuel filter if clogged and consider replacing the fuel pump if necessary.

5. Inspect Fuel Injectors

• Tools Required: Engine diagnostic tool, fuel injector cleaner.
• Sub-steps:
  1. Use the diagnostic tool to activate the fuel injectors and listen for clicking sounds.
  2. If any injectors are silent, inspect for electrical issues or replace the faulty injectors.
  3. If all injectors are operational, use fuel injector cleaner to clean them while running.