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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal for safety.
• Allow the engine to cool down completely.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Visually inspect the air intake for cracks or loose connections.
  2. Tighten any loose clamps and replace damaged hoses.
  3. If leaks are found, replace the affected components.

3. Test and Replace Fuel System Components

• Tools Required: Fuel pressure gauge, socket set
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition key to the "On" position (do not start) to check fuel pressure.
  3. Compare the pressure reading with the specifications in the service manual; replace the fuel pump if pressure is low.
  4. If the fuel filter is clogged, replace it as part of routine maintenance.

4. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using a screwdriver.
  3. Clean the sensor with MAF cleaner and allow it to dry completely, or replace it if damaged.
  4. Reinstall the sensor and reconnect the electrical connector.

5. Inspect and Replace Oxygen Sensors

• Tools Required: Oxygen sensor socket, torque wrench
• Sub-steps:
  1. Locate the upstream and downstream oxygen sensors.
  2. Disconnect the electrical connectors and remove the sensors using the oxygen sensor socket.
  3. Install new sensors and tighten them to the specified torque.
  4. Reconnect the electrical connectors.