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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface with the engine turned off and cooled down.

2. Inspect Air Intake System

• Tools Required: Screwdriver set, flashlight
• Steps:
  1. Visually inspect all air intake hoses for cracks or loose connections.
  2. Tighten any loose clamps or replace damaged hoses as necessary.
  3. Check the intake manifold gasket for leaks and replace if damaged.

3. Check Fuel System

• Tools Required: Fuel pressure gauge
• Steps:
  1. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
  2. Connect the fuel pressure gauge to the fuel rail.
  3. Start the engine and observe the fuel pressure. It should be within manufacturer specifications (usually around 40-50 psi).
  4. If the pressure is low, inspect the fuel pump and filter for blockage and replace as necessary.

4. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, Torx screwdriver
• Steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the intake duct.
  3. Spray MAF cleaner on the sensor element and allow it to dry completely.
  4. Reinstall the sensor and reconnect the electrical connector.

5. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket
• Steps:
  1. Locate the upstream and downstream oxygen sensors on Bank 2.
  2. Use the O2 sensor socket to remove the sensors.
  3. Inspect the sensors for carbon buildup or damage.
  4. Replace any faulty sensors with new ones.

6. Test Fuel Injectors

• Tools Required: Multimeter, injector cleaning kit (if needed)
• Steps:
  1. Disconnect the injector harness and check for voltage using a multimeter.
  2. If no voltage is present, trace back to the ECM for wiring issues.
  3. If voltage is present, perform a resistance test on the injectors.
  4. Clean or replace any injectors that are clogged or malfunctioning.