how to fix P0171 code in Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, automotive soap solution.
• Steps:
  1. Use a vacuum gauge to check for leaks in the intake manifold and hoses.
  2. Apply a soap solution around suspected areas while the engine is running; bubbles indicate a leak.
  3. Replace any damaged hoses or use sealant to repair small leaks.

3. Check and Clean the MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Steps:
  1. Locate the MAF sensor on the air intake duct.
  2. Disconnect the electrical connector and unscrew the sensor from the duct.
  3. Spray the MAF sensor with MAF cleaner and let it dry completely before reinstalling.

4. Test and Replace Fuel Components

• Tools Required: Fuel pressure gauge, socket set, fuel injector cleaner.
• Steps:
  1. Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position (do not start the engine).
  2. Check that the fuel pressure is within manufacturer specifications; replace the fuel pump if low.
  3. Use a fuel injector cleaner to clean the injectors, or replace them if they are clogged or leaking.

5. Reassemble and Reconnect

• Reattach any components removed during the inspection and cleaning processes.
• Reconnect the negative battery terminal and ensure all tools are removed from the engine bay.