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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety during repairs.
• Tools Required: OBD-II scanner, fuel pressure gauge, socket set, multimeter, cleaning supplies for MAF sensor.

2. Inspect and Repair Vacuum Leaks

• Visual inspection: Check all vacuum hoses for cracks or disconnections.
• If a leak is found, replace the damaged hoses.
• Reattach any loose connections securely.

3. Test and Clean MAF Sensor

• Locate the MAF sensor in the air intake system.
• Disconnect the electrical connector and remove the sensor.
• Use MAF cleaner to spray the sensor elements gently. Do not touch the sensor with hands or tools.
• Allow the sensor to dry completely before reinstallation.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position (not starting the engine) and check the pressure reading.
• Compare the reading with the manufacturer's specifications. If it’s low, inspect the fuel pump and fuel filter for issues.
• Replace the fuel filter if clogged; if the fuel pump is faulty, replace it.

5. Examine Fuel Injectors

• Remove the fuel rail to access the fuel injectors.
• Visually inspect the injectors for clogs or leaks.
• Clean the injectors using a professional cleaning kit or replace them if necessary.
• Reassemble the fuel rail and reconnect all components.