how to fix P0171 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shocks.
• Raise the vehicle with jack stands if necessary.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect the air intake hoses and connections for cracks or loose fittings.
  • Use a smoke machine to detect vacuum leaks if needed.
  • Tighten or replace any damaged hoses or fittings.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor on the air intake duct.
  • Remove the electrical connector and unscrew the sensor.
  • Clean the MAF sensor with MAF cleaner spray and let it dry.
  • If damaged, replace it with a new MAF sensor.

4. Check Fuel System

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position without starting the engine to check fuel pressure.
  • Compare the readings with manufacturer specifications; replace the fuel pump if pressure is low.

5. Inspect Exhaust System

• Sub-steps:
  • Visually inspect the exhaust system for leaks, particularly near the exhaust manifold and O2 sensors.
  • Repair any leaks found by using exhaust sealant or replacing damaged sections of the exhaust.