what does code P0171 mean for my Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical issues.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Air Intake System

• Inspect: Visually check all hoses and connections in the air intake system for leaks or damage.
• Repair: Replace any damaged hoses or clamps. Ensure all connections are tight.

3. Check and Clean MAF Sensor

• Remove: Disconnect the MAF sensor from the air intake duct.
• Clean: Use MAF sensor cleaner to remove dirt and debris. Avoid touching the sensor elements with fingers or tools.
• Reinstall: Reattach the MAF sensor securely.

4. Test Fuel Pressure

• Connect: Attach a fuel pressure gauge to the fuel rail test port.
• Measure: Turn the ignition key to the "ON" position (do not start) and check the pressure reading against manufacturer specifications.
• Adjust: If the pressure is low, inspect the fuel pump and filter for issues.

5. Inspect Oxygen Sensors

• Check: Remove the upstream oxygen sensor and inspect it for damage or contamination.
• Replace: If defective, install a new oxygen sensor according to manufacturer specs.

6. Check Fuel Injectors

• Inspect: Remove the fuel injectors and check for clogs or leaks.
• Test: Use a multimeter to test the resistance of each injector.
• Replace: Install new injectors if they are found to be faulty.