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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool before working on any components.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver.
• Inspect all vacuum lines and the intake manifold for any cracks or disconnections.
• If a leak is found, replace the damaged hose or reattach the disconnected section securely.

3. Clean the MAF Sensor

• Tools Required: MAF sensor cleaner, soft brush.
• Locate the MAF sensor in the air intake path.
• Remove the MAF sensor carefully.
• Spray the MAF sensor cleaning solution onto the sensor elements and let it dry completely before reinstalling.

4. Test Fuel Pressure

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

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaner or ultrasonic cleaner.
• Remove the fuel injectors from the fuel rail.
• Clean the injectors using a cleaning solution or professional cleaning service.
• Reinstall injectors ensuring proper seating and connection.

6. Check Throttle Body

• Tools Required: Throttle body cleaner, soft cloth.
• Remove the air intake duct to access the throttle body.
• Inspect for carbon buildup and clean it using throttle body cleaner and a cloth.
• Reassemble the components securely.