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

Solution

1. Preparation

• Tools Required: OBD-II scanner, vacuum gauge, fuel pressure gauge, multimeter, socket set, cleaning supplies.
• Ensure the vehicle is parked on a level surface, and the engine is cool.

2. Inspect and Repair Vacuum Leaks

1. Visually inspect all vacuum hoses connected to the intake manifold.
2. Use a vacuum gauge to test the intake manifold for leaks.
3. If leaks are found, replace damaged hoses or seals.
4. Reconnect any loose connections securely.

3. Clean or Replace MAF Sensor

1. Disconnect the MAF sensor electrical connector.
2. Remove the MAF sensor from the air intake duct.
3. Use MAF sensor cleaner to spray the sensor elements gently. Do not touch them.
4. Allow the sensor to dry completely and reinstall.
5. Reconnect the electrical connector.

4. Test Fuel Pressure

1. Locate the fuel pressure test port on the fuel rail.
2. Connect the fuel pressure gauge to the test port.
3. Turn the ignition key to the "ON" position (do not start the engine) to check the fuel pressure.
4. Compare the reading to the manufacturer's specifications. If low, inspect the fuel pump and filter for issues.
5. Replace the fuel filter or pump if necessary.

5. Inspect and Clean Fuel Injectors

1. Remove the fuel rail to access the injectors.
2. Inspect each injector for clogs or damage.
3. Use fuel injector cleaner to flush each injector or replace them if needed.
4. Reinstall the fuel rail and ensure all connections are secure.