how to fix P0174 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the battery before starting work on the electrical components.

2. Inspect Air Intake System

• Tools Required: Screwdriver set, flashlight.
• Check all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Inspect the intake manifold gasket for leaks.
• Tighten or replace any loose or damaged components.

3. Clean MAF Sensor

• Tools Required: MAF sensor cleaner or electrical cleaner.
• Remove the MAF sensor from the air intake duct.
• Spray MAF cleaner liberally on the sensor element and allow it to dry.
• Reinstall the MAF sensor securely.

4. Test Fuel System

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position and check the fuel pressure.
• Compare the reading with manufacturer specifications; replace the fuel pump or filter if pressure is low.

5. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket.
• Remove the downstream oxygen sensor for inspection or replacement.
• Test the sensor’s resistance or voltage output (specific values may vary by model).
• Replace the sensor if it is outside of specifications.

6. Clear Codes and Test Drive

• Reconnect the battery and use the OBD-II scanner to clear the code.
• Start the engine and let it idle.
• Take the vehicle for a test drive to ensure the check engine light does not reappear.