what does it mean if my Honda Civic 10th Generation (2016-2021) is throwing a P0171 code

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Use a smoke machine or propane to locate any vacuum leaks in hoses or intake manifold.
  2. Replace any damaged hoses or gaskets found during the inspection.
• Tools Required: Smoke machine or propane torch, basic hand tools.

3. Clean and Test the MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from the air intake duct.
  2. Clean the sensor using MAF cleaner spray.
  3. Reinstall the MAF sensor securely.
• Tools Required: MAF cleaner spray, screwdriver set.

4. Check Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "on" position without starting the engine to check the pressure.
  3. Compare the reading to manufacturer specifications; replace the fuel pump if necessary.
• Tools Required: Fuel pressure gauge.

5. Inspect and Clean Fuel Injectors

• Sub-steps:
  1. Remove the fuel injectors from the engine.
  2. Clean the injectors using an ultrasonic cleaner or a dedicated fuel injector cleaner.
  3. Reinstall the fuel injectors ensuring proper sealing.
• Tools Required: Ultrasonic cleaner or injector cleaning kit.

6. Clean Throttle Body

• Sub-steps:
  1. Remove the throttle body from the intake manifold.
  2. Clean the throttle body using throttle body cleaner.
  3. Reinstall the throttle body and reconnect all hoses and electrical connectors.
• Tools Required: Throttle body cleaner, socket set.