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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before proceeding with any work.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, vacuum gauge, flashlight.
• Check the entire air intake system for any visible leaks.
• Tighten any loose clamps or screws.
• Use a vacuum gauge to test for vacuum leaks in hoses; replace any damaged hoses.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF cleaner onto the sensor elements and allow it to dry completely.
• Reinstall the MAF sensor securely.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "ON" position (do not start the engine) and check the pressure reading.
• If the pressure is below manufacturer specifications, inspect the fuel pump and fuel filter for issues.

5. Inspect and Clean Fuel Injectors

• Tools Required: Injector cleaning kit or fuel injector cleaner.
• Remove the fuel injectors from the fuel rail.
• Clean the injectors using an injector cleaning kit or replace them if they are faulty.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code from the vehicle's computer.