how to fix P0174 code in Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Make sure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical issues during repairs.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Check for any visible cracks or loose connections in the intake hoses and vacuum lines.
• Tighten or replace any loose clamps or damaged hoses.
• If cracks are found, replace the intake hose or affected component.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, socket set.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with MAF cleaner and let it dry completely before reinstalling.
• If the sensor is damaged or cleaning does not resolve the issue, replace it with a new one.

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 without starting the engine and check the pressure. It should be within the manufacturer's specifications (typically around 40-50 psi for Honda).
• If the pressure is low, inspect the fuel pump and replace the fuel filter if clogged.

5. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket, multimeter.
• Locate the upstream and downstream oxygen sensors.
• Check the wiring and connectors for damage.
• Use a multimeter to test the sensor’s voltage output; if it’s out of spec, replace the sensor.

6. Check PCV System

• Tools Required: Basic hand tools.
• Inspect the PCV valve for proper function. Remove it and shake; if it does not rattle, replace it.
• Check hoses for blockages or leaks and replace as necessary.