how to resolve P0171 code in my Honda Civic 10th Generation (2016-2021) engine?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on any components.

2. Inspect and Repair Air Intake System

• Visually inspect air intake hoses and connections for any cracks or leaks.
• Tools Required: Visual inspection tools (flashlight)
• If leaks are found, replace the damaged hoses or clamps.

3. Clean or Replace MAF Sensor

• Remove the MAF sensor from the intake.
• Use MAF sensor cleaner to clean the sensor element.
• Reinstall the sensor after cleaning.
• Tools Required: Screwdriver, MAF sensor cleaner

4. Check and Repair Fuel System

• Connect a fuel pressure gauge to the fuel rail to measure the fuel pressure.
• Tools Required: Fuel pressure gauge
• If pressure is low, check the fuel pump and filter for proper operation and replace as necessary.

5. Inspect and Test Fuel Injectors

• Use a noid light to check if the fuel injectors are receiving the proper signal.
• If injectors are not firing, check wiring and connectors for damage.
• If injectors are faulty, replace them.
• Tools Required: Noid light, multimeter, injector removal tools

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code from the system.