how to fix engine code P0171 on Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid electrical issues.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdriver set
• Sub-steps:
  1. Remove the engine cover (if applicable) using the socket set.
  2. Inspect the air intake hose and connections for cracks or loose clamps.
  3. Replace any damaged hoses or re-tighten loose connections.

3. Check and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps (if necessary)
• Sub-steps:
  1. Use a vacuum gauge to check for proper vacuum readings.
  2. Inspect and replace any damaged vacuum lines.
  3. Secure any loose connections with hose clamps.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail and connect the fuel pressure gauge.
  2. Turn the ignition key to the "ON" position (do not start) to check the pressure.
  3. Compare the reading to the manufacturer's specifications. Replace the fuel pump if pressure is below specifications.

5. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Sub-steps:
  1. Disconnect the MAF sensor connector.
  2. Remove the MAF sensor using the Torx screwdriver.
  3. Clean the MAF sensor with MAF sensor cleaner or replace it if damaged.

6. Inspect and Clean Fuel Injectors

• Tools Required: Injector cleaning kit (if cleaning), socket set
• Sub-steps:
  1. Remove the fuel rail and injectors from the engine.
  2. Clean the injectors using an injector cleaning kit or replace them if they are faulty.
  3. Reinstall the injectors and fuel rail ensuring all connections are secure.