how to fix P0174 code on my Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before beginning work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, socket set
• Steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a vacuum gauge to check for leaks; a reading lower than specified indicates a leak.
  3. Replace any damaged hoses or reattach loose connections.
  4. Inspect the intake manifold gasket for signs of wear and replace if necessary.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF cleaner, screwdriver, multimeter
• Steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the MAF sensor from the intake duct.
  3. Spray MAF cleaner on the sensor and let it dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.
  5. If cleaning does not resolve the issue, replace the MAF sensor.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge, socket set
• Steps:
  1. Locate the fuel rail and connect the fuel pressure gauge.
  2. Turn the ignition to the "ON" position (without starting the engine) to check the pressure.
  3. Compare the reading with manufacturer specifications (typically around 40-50 psi).
  4. If pressure is low, check the fuel pump and filter for issues and replace as necessary.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, injector cleaner kit
• Steps:
  1. Disconnect the fuel injector connectors.
  2. Use a multimeter to check the resistance of each injector (should be within specified range).
  3. If any injectors are faulty, replace them.
  4. If injectors are clogged, use an injector cleaning kit to clean them.

6. Verify Oxygen Sensor Functionality

• Tools Required: Multimeter
• Steps:
  1. Locate the downstream oxygen sensor (Bank 2).
  2. Disconnect the sensor and check the voltage output using a multimeter.
  3. Replace the sensor if it is not functioning correctly (voltage should fluctuate between 0.1V and 0.9V).