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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect Air Intake System

• Tools Required: Hose clamp pliers, flashlight
• Check all intake hoses and connections for leaks or cracks.
• Remove and inspect the air filter for blockages; replace if necessary.

3. Clean MAF Sensor

• Tools Required: MAF sensor cleaner
• Remove the MAF sensor from the air intake system.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely before reinstalling.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge, fuel line disconnect tool
• Connect the fuel pressure gauge to the fuel rail.
• Start the engine and observe the pressure reading; it should match the manufacturer's specifications (typically around 40-60 psi).
• If pressure is low, check the fuel pump and filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit or solvent
• Remove fuel injectors for inspection.
• Check for any clogs or leaks; clean or replace injectors as necessary.

6. Verify ECT Sensor Operation

• Tools Required: Multimeter
• Disconnect the ECT sensor connector.
• Measure the resistance of the sensor at various temperatures to ensure it operates within specifications.
• Replace the sensor if it is out of spec.