how to fix P0171 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Inspect and Clean MAF Sensor

• Locate the MAF sensor on the air intake duct.
• Carefully remove the electrical connector and the sensor.
• Use MAF cleaner to gently clean the sensor element. Avoid touching it with your fingers.
• Allow the sensor to dry completely before reinstallation.

3. Check for Vacuum Leaks

• Inspect all vacuum hoses and intake connections for cracks or disconnections.
• Use a smoke machine or propane torch (unlit) around suspected areas to check for leaks.
• Replace any damaged hoses or seals as necessary.

4. Test and Replace Fuel Filter (if necessary)

• Locate the fuel filter and check for blockages.
• If the fuel filter is clogged, replace it with a new one.
• Ensure all connections are secure and leak-free post-replacement.

5. Inspect Fuel Injectors

• Remove the intake manifold (if necessary) to access the fuel injectors.
• Check for carbon buildup or leaks around injectors.
• Clean or replace the fuel injectors as needed.

6. Reset the Engine Control Module (ECM)

• Reconnect the negative battery terminal.
• Use an OBD-II scanner to clear the P0171 code from the ECM.
• Start the engine and allow it to reach operating temperature.