how to fix P0171 code in my Ram 1500 DT (2019-Present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting any work.

2. Inspect and Repair Air Intake System

• Inspect hoses and gaskets:
  • Visually inspect for cracks or disconnections.
  • Replace any damaged hoses or gaskets.
• Check MAF sensor:
  • Remove the MAF sensor from the intake.
  • Clean the sensor with MAF sensor cleaner, avoiding contact with the sensing elements.
  • Reinstall the sensor securely.

3. Check Fuel System

• Fuel pressure check:
  • Attach a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the ON position (do not start the engine) and check the pressure reading.
  • Compare it with the manufacturer’s specifications; if low, inspect the fuel pump and filter.
• Inspect fuel injectors:
  • Remove the fuel injectors from the fuel rail.
  • Clean or replace any clogged injectors.
  • Reinstall the injectors and ensure the O-rings are intact.

4. Vacuum Leak Repair

• Perform a vacuum leak test:
  • Use a smoke machine or propane enrichment to identify vacuum leaks.
  • Repair any detected leaks by replacing affected hoses or sealing gaskets.

5. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code.
• Conduct a test drive to ensure the engine operates normally.