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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool before working.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, basic hand tools.
• Inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
• Use the vacuum gauge to check for leaks; replace any faulty hoses or components.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Disconnect the electrical connector from the MAF sensor.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely before reinstalling.

4. Test and Replace Fuel Pressure Regulator (if needed)

• Tools Required: Fuel pressure gauge, socket set.
• Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position without starting the engine.
• Verify the fuel pressure reading (should be within manufacturer specifications).
• If the pressure is low, replace the fuel pressure regulator.

5. Check and Clean Fuel Injectors

• Tools Required: Injector cleaning kit, socket set.
• Remove the fuel injectors from the fuel rail.
• Use an injector cleaning kit to clean each injector thoroughly.
• Reinstall the injectors and ensure all connections are secure.

6. Clear Codes and Test Drive

• Reconnect the battery and use the OBD-II scanner to clear the P0174 code.
• Start the engine and perform a test drive to ensure that the check engine light does not reappear.