what does it mean if my Honda Pilot YF3 (2016-2022) is showing a P0171 code

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, vacuum gauge, hose clamps.
• Visually inspect the entire air intake system for cracks or loose connections.
• Tighten any loose clamps and replace any damaged hoses or gaskets.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, torx screwdriver.
• Remove the MAF sensor from the intake tube.
• Spray the MAF cleaner onto the sensor elements and allow it to dry completely before reinstalling.
• If damaged, replace the MAF sensor with a new one.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Start the engine and monitor fuel pressure; it should meet manufacturer specifications (typically around 35-45 psi for Honda).
• If pressure is low, inspect and replace the fuel pump or filter as necessary.

5. Inspect and Replace ECT Sensor (if necessary)

• Tools Required: Socket set, wrench set, coolant catch pan.
• Locate the ECT sensor on the engine block.
• Disconnect the electrical connector and remove the sensor using the socket set.
• Replace with a new sensor and reconnect the electrical connector.