how to fix the P0174 code on my Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdriver set, vacuum pressure gauge
• Check the air intake duct for cracks or loose fittings.
• Tighten any loose clamps or replace damaged hoses.
• If necessary, replace the air intake duct.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF sensor cleaner
• Remove the MAF sensor from the air intake system.
• Clean the MAF sensor with the appropriate cleaner; allow it to dry completely.
• Reinstall the MAF sensor and ensure it is securely connected.

4. Check and Repair Fuel System

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position without starting the engine to check fuel pressure.
• If pressure is low, inspect the fuel pump, filter, and pressure regulator for issues. Replace any faulty components.

5. Inspect for Vacuum Leaks

• Use a smoke machine or carburetor cleaner to detect vacuum leaks.
• If a leak is found, replace the affected hoses or gaskets.
• Ensure all vacuum lines are securely connected and in good condition.

6. Replace Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket
• If diagnostics show a faulty oxygen sensor, locate the sensor, disconnect the wiring harness, and remove it using the O2 sensor socket.
• Install the new oxygen sensor, ensuring a proper seal and reconnect the wiring harness.