how to fix my Honda Civic 11th Generation (2022-Present) that keeps throwing P0171 code

Solution

1. Preparation

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

Tools Required:

• OBD-II scanner
• Fuel pressure gauge
• Socket set
• Torque wrench
• MAF sensor cleaner

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all air intake hoses for cracks or loose connections.
  2. Tighten any loose clamps and replace any damaged hoses.
  3. Spray MAF sensor cleaner on the MAF sensor to remove contaminants.

3. Test and Replace Fuel Pressure Regulator (if necessary)

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn on the ignition (without starting the engine) and check the fuel pressure.
  3. Compare the reading to manufacturer specifications. If low, replace the fuel pressure regulator.
  4. Disconnect the fuel line and replace the regulator, ensuring all connections are secure.

4. Clean or Replace Fuel Injectors

• Sub-steps:
  1. If injectors are clogged, remove them from the engine.
  2. Clean with a fuel injector cleaning kit or replace them if necessary.
  3. Reinstall the injectors, ensuring proper alignment and secure connections.

5. Check Engine Coolant Temperature Sensor

• Sub-steps:
  1. Locate the sensor near the thermostat housing.
  2. Disconnect the electrical connector and remove the sensor.
  3. Test the sensor's resistance with a multimeter and compare it to specifications. Replace if faulty.