my Ram 1500 DT (2019-Present) has a check engine light and code P0171, what could be the issue

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Remove the air intake duct and inspect for any cracks or loose fittings.
• Reconnect or replace any damaged components as necessary.
• Use a vacuum gauge to check for leaks in the intake system.

3. Clean or Replace Mass Air Flow (MAF) Sensor

• Tools Required: MAF sensor cleaner, Torx or socket wrench.
• Carefully remove the MAF sensor from the air intake.
• Clean the sensor using MAF sensor cleaner; do not touch the sensor element directly.
• If damaged, replace the MAF sensor with a new one.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, socket set.
• Connect the fuel pressure gauge to the fuel rail and turn the ignition on without starting the engine.
• Check the fuel pressure readings against manufacturer specifications. If low, inspect and replace the fuel filter and/or fuel pump as necessary.

5. Inspect Vacuum Lines

• Tools Required: Visual inspection tools.
• Visually inspect all vacuum lines for cracks or disconnections.
• Replace any damaged vacuum lines to ensure a proper seal.

6. Examine Exhaust System

• Tools Required: Socket set, exhaust leak detection spray (optional).
• Inspect the exhaust manifold and pipes for leaks.
• Use exhaust leak detection spray to identify leaks while the engine is running; repair any leaks found.