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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

1. Visually inspect all vacuum hoses connected to the intake manifold and replace any that are cracked or disconnected.
2. Use a smoke machine or carburetor cleaner to detect vacuum leaks around the intake manifold gasket and throttle body. Repair or replace any faulty components.

3. Clean or Replace MAF Sensor

1. Locate the MAF sensor, usually situated between the air filter and throttle body.
2. Disconnect the electrical connector from the MAF sensor.
3. Remove the MAF sensor using a Torx or socket wrench.
4. Clean the sensor with MAF cleaner spray; avoid touching the sensor element.
5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

1. Locate the fuel rail and connect a fuel pressure gauge.
2. Turn the ignition to the "ON" position without starting the engine to check the fuel pressure.
3. Compare the reading to manufacturer specifications (usually around 40-50 psi for Honda).
4. If low, inspect the fuel pump and fuel filter. Replace if necessary.

5. Test Fuel Injectors

1. Remove the fuel rail with the injectors attached.
2. Inspect the injectors for clogs or leaks.
3. Clean or replace any faulty injectors.
4. Reassemble the fuel rail and reconnect any necessary fuel lines.