how to fix P0171 code in my Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Vacuum gauge, hose clamps, socket set.
• Check all vacuum hoses for cracks or disconnections. Replace any damaged hoses.
• Inspect the intake manifold gaskets for leaks and replace them if necessary.
• Reconnect any loose connections securely.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver.
• Locate the MAF sensor in the intake path.
• Disconnect the electrical connector and remove the sensor.
• Spray MAF cleaner on the sensor element and allow it to dry completely.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel System

• Tools Required: Fuel pressure gauge, torque wrench.
• Connect a fuel pressure gauge to the fuel rail.
• Start the engine and check the fuel pressure; it should meet manufacturer specifications (usually around 40-50 PSI).
• If pressure is low, check the fuel pump and filter for blockage or malfunction; replace as needed.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaner, socket set.
• Remove the fuel rail and injectors from the engine.
• Soak the injectors in a fuel injector cleaning solution or use an ultrasonic cleaner.
• Reinstall the injectors and fuel rail, ensuring proper torque specifications are followed.