how to fix P0174 code in Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to avoid electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Hose clamps, screwdriver, torque wrench
• Steps:
  1. Inspect all intake hoses for cracks or loose connections.
  2. Tighten any loose clamps or replace damaged hoses with new ones.
  3. Check the intake manifold gasket for leaks and replace if necessary.

3. Test and Clean MAF Sensor

• Tools Required: MAF sensor cleaner
• Steps:
  1. Disconnect the MAF sensor connector.
  2. Remove the MAF sensor from the air intake duct.
  3. Spray MAF sensor cleaner onto the sensor elements to remove dirt.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Steps:
  1. Locate the fuel rail on the engine.
  2. Connect the fuel pressure gauge to the service port on the fuel rail.
  3. Turn the ignition to the "ON" position (do not start) and check the fuel pressure.
  4. If pressure is below specification, check the fuel pump and filter; replace if necessary.

5. Inspect and Test Fuel Injectors

• Tools Required: Injector testing kit
• Steps:
  1. Disconnect the fuel injector connectors.
  2. Use the injector testing kit to perform a balance test to ensure all injectors are functioning equally.
  3. Replace any faulty injectors.

6. Replace Oxygen Sensors if Necessary

• Tools Required: Oxygen sensor socket
• Steps:
  1. Locate the upstream and downstream oxygen sensors on bank 2.
  2. Disconnect the electrical connectors.
  3. Use the oxygen sensor socket to remove the sensors.
  4. Install new oxygen sensors, ensuring they are properly torqued to specifications.