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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the vehicle to cool before working on the intake or exhaust systems.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, rubber gloves
• Use a vacuum gauge to check for proper vacuum levels.
• Visually inspect all vacuum lines for cracks or disconnections.
• Replace any damaged hoses or gaskets identified during inspection.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, torx screwdriver
• Remove the MAF sensor from the air intake duct.
• Spray the MAF cleaner onto the sensor elements to remove dirt and debris.
• Allow the sensor to dry completely before reinstalling it.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, basic hand tools
• Attach the fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (do not start) to check the fuel pressure.
• If the pressure is below specifications, check for a clogged fuel filter or failing fuel pump.
• Replace the fuel filter or fuel pump if necessary.

5. Inspect and Test Oxygen Sensors

• Tools Required: Multimeter
• Locate the upstream and downstream oxygen sensors.
• Use a multimeter to check the voltage output of the sensors while the engine is running.
• Replace any sensors that are not within the specified voltage range.

6. Clear Codes and Test Drive

• After repairs, use the OBD-II scanner to clear the P0174 code.
• Reconnect the negative battery terminal and test drive the vehicle to ensure the issue is resolved.