what does P0171 code mean for Honda Accord 9th Generation (2013-2017)?

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface.
• Disconnect the negative battery terminal to prevent electrical shock.
• Gather necessary tools and parts.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, hose clamp pliers, flashlight
• Inspect all vacuum hoses and connections for cracks or looseness.
• Tighten or replace any loose or damaged hoses.
• Check the intake manifold gasket for leaks and replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, small screwdriver
• Remove the MAF sensor from the air intake duct.
• Spray MAF sensor cleaner on the sensor element and let it dry.
• Reinstall the MAF sensor securely back into the intake duct.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail Schrader valve.
• Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading.
• If the pressure is below the manufacturer's specification, replace the fuel pump or filter as needed.

5. Inspect and Replace Oxygen Sensors

• Tools Required: O2 sensor socket, ratchet
• Locate the upstream (pre-catalytic converter) and downstream (post-catalytic converter) oxygen sensors.
• Unplug the connectors and remove the sensors using an O2 sensor socket.
• Install new sensors and make sure to reconnect the wiring harness.