how to fix the P0171 code on my Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal.
• Ensure the vehicle is on a flat surface and securely supported.

2. Inspect and Replace Vacuum Lines

• Sub-steps:
  1. Inspect all vacuum lines connected to the intake manifold.
  2. Replace any damaged or cracked vacuum lines.
  3. Reconnect any lines that may have become disconnected.

3. Clean or Replace Mass Airflow Sensor (MAF)

• Tools Required: MAF cleaner
• Sub-steps:
  1. Disconnect the MAF sensor wiring harness.
  2. Remove the MAF sensor from the intake duct.
  3. Clean the MAF sensor using a dedicated MAF cleaner and allow it to dry.
  4. If damaged, replace the MAF sensor with a new one.
  5. Reinstall the MAF sensor and reconnect the wiring harness.

4. Check Fuel System

• Sub-steps:
  1. Use a fuel pressure gauge to check fuel pressure at the fuel rail.
  2. Replace the fuel filter if fuel pressure is low.
  3. Ensure the fuel pump is functioning properly.

5. Inspect and Replace Intake Manifold Gasket

• Sub-steps:
  1. Remove components obstructing the intake manifold access.
  2. Unbolt the intake manifold and carefully lift it away.
  3. Inspect the gasket for wear or damage.
  4. Clean the mating surfaces thoroughly.
  5. Replace the gasket and reassemble the intake manifold.