my Honda Civic 11th Generation (2022-Present) has a P0171 code, what does that mean?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Repair the Air Intake System

• Inspect for Leaks:
  • Visually check all hoses and connection points for cracks or disconnections.
  • Use a smoke machine if available to identify vacuum leaks.
• Repair or Replace:
  • Replace any damaged hoses or tighten loose connections.

3. Clean or Replace the MAF Sensor

• Removal:
  • Disconnect the electrical connector from the MAF sensor.
  • Remove the MAF sensor from the air intake duct using a Torx or screwdriver, as applicable.
• Cleaning:
  • Use MAF sensor cleaner to thoroughly clean the sensing elements.
  • Allow it to dry completely before reinstallation.
• Replacement:
  • If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Check and Repair Fuel Delivery System

• Fuel Pressure Testing:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position without starting the engine and check fuel pressure against specifications.
• Inspect Fuel Injectors:
  • Remove fuel injectors and visually check for clogs or damage.
  • Clean or replace injectors as necessary.

5. Inspect and Test Oxygen Sensors

• Removal and Inspection:
  • Disconnect the upstream oxygen sensor from the harness.
  • Remove the sensor using an oxygen sensor socket.
• Testing:
  • Use a multimeter to verify the sensor's resistance and operation.
  • Replace if faulty.