what does it mean when my Honda Pilot YF4 (2023-Present) shows P0171 code

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is parked on a flat surface and secure it with wheel chocks.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps
• Check all vacuum lines for cracks or disconnections. Replace any damaged hoses.
• Inspect the intake manifold gasket for leaks. Replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with cleaner and let it dry completely before reinstalling.
• If the sensor is damaged, replace it with a new unit.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Start the engine and check the pressure against manufacturer specifications. If pressure is low, inspect the fuel pump and fuel filter.
• Replace any faulty components to restore proper fuel pressure.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaning kit
• Remove the fuel injectors from the engine.
• Use an injector cleaning kit to clean the injectors thoroughly. Replace any that are malfunctioning.