how to troubleshoot P0174 code in Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.

2. Inspect Vacuum Hoses

• Sub-steps:
  • Visually inspect all vacuum hoses for cracks, wear, or disconnections.
  • Use a smoke machine to detect vacuum leaks if necessary.
  • Replace any damaged hoses as needed.
• Tools Required: Smoke machine (optional), basic hand tools.

3. Clean MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake duct.
  • Use a specialized MAF cleaner to spray the sensor elements.
  • Allow it to dry completely before reinstalling.
• Tools Required: Torx or Phillips screwdriver, MAF cleaner.

4. Check Fuel Pressure

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position (without starting the engine) to check the pressure.
  • Compare the reading to the manufacturer's specifications; replace the fuel pump or filter if pressure is low.
• Tools Required: Fuel pressure gauge, basic hand tools.

5. Inspect Intake Manifold Gaskets

• Sub-steps:
  • Remove the intake manifold if necessary to access gaskets.
  • Inspect the gaskets for any signs of damage or wear.
  • Replace gaskets if any leaks are detected.
• Tools Required: Socket set, torque wrench, gasket scraper.

6. Check Fuel Injectors

• Sub-steps:
  • Remove the fuel rail to access the injectors.
  • Inspect for clogs or leaks; clean or replace if necessary.
  • Ensure proper electrical connection to each injector.
• Tools Required: Socket set, injector cleaner kit.