what does it mean if my Honda Civic 11th Generation (2022-Present) has a P0171 code

Solution

1. Preparation

• Gather tools and required parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all air intake hoses for cracks or disconnections.
  2. Replace any damaged hoses.
  3. Ensure the air filter is clean; replace if necessary.

3. Check and Clean the MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor along the air intake duct.
  2. Remove the sensor from its housing carefully.
  3. Use MAF sensor cleaner to spray the sensor and allow it to dry completely.
  4. Reinstall the MAF sensor securely.

4. Test Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition key to the "ON" position without starting the engine.
  3. Record the fuel pressure reading; it should match manufacturer specifications.
  4. If the pressure is low, inspect the fuel pump and fuel filter.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the fuel injectors.
  2. Check for clogs or leaks in the injectors.
  3. Clean or replace any faulty injectors as necessary.

6. Reassemble and Connect Battery

• Sub-steps:
  1. Reinstall the fuel rail and all components removed during inspection.
  2. Reconnect the negative battery terminal.
  3. Clear the P0171 code using the OBD-II scanner.