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

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before beginning work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, socket set, screwdrivers
• Inspect all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses.
• Check the intake manifold gasket for signs of wear; replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft cloth
• Detach the MAF sensor from the intake duct.
• Spray MAF cleaner on the sensor wire and allow it to dry completely before reinstalling.
• If damaged, replace the MAF sensor with a new one.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail test port.
• Turn the ignition to the "ON" position (do not start) and read the pressure; it should meet manufacturer specifications (approximately 40-50 psi).
• If pressure is low, check the fuel pump and filter and replace as necessary.

5. Inspect Throttle Body

• Tools Required: Throttle body cleaner, rag
• Remove the air intake duct to access the throttle body.
• Clean the throttle body with throttle body cleaner, especially around the throttle plate.
• Reinstall the duct securely.

6. Reassemble and Test

• Reconnect all components and ensure all connections are secure.
• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.