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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool if it has been running.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Check for any visible leaks in the air intake hoses and replace any damaged hoses.
• Use a vacuum gauge to test for leaks; a low reading indicates a leak.
• Reconnect any loose connections securely.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, Torx screwdriver
• Disconnect the electrical connector from the MAF sensor.
• Remove the MAF sensor from the air intake tube.
• Clean the MAF sensor using a dedicated MAF cleaner; allow it to dry completely before reinstalling.
• If cleaning does not improve performance, replace the MAF sensor.

4. Inspect Fuel System

• Tools Required: Fuel pressure gauge, socket set
• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position without starting the engine and check fuel pressure. It should be within the manufacturer's specifications (usually around 40-50 psi).
• If the pressure is low, check the fuel pump, fuel filter, and fuel lines for blockages or failure.
• Replace any faulty components as needed.

5. Check and Clean Fuel Injectors

• Tools Required: Injector cleaner, socket set, fuel injector removal tool
• Remove the fuel rail and injectors from the engine.
• Use an injector cleaner to clean the injectors or replace them if they are faulty.
• Reinstall the fuel injectors and fuel rail securely, ensuring proper sealing.