how to fix P0171 code on Ram 1500 DT (2019-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Safely elevate the vehicle if needed.

2. Inspect and Replace Vacuum Hoses

• Sub-steps:
  • Visually inspect all vacuum hoses for wear, damage, or loose connections.
  • Replace any damaged hoses with OEM or equivalent parts.
• Tools Required: Pliers, hose cutter

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Disconnect the MAF sensor electrical connector.
  • Remove the MAF sensor from the air intake duct.
  • Clean the MAF sensor using MAF cleaner spray, ensuring no residue is left.
  • Reinstall the MAF sensor and reconnect the electrical connector.
• Tools Required: Screwdriver, MAF sensor cleaner

4. Check Fuel System Pressure

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail service port.
  • Turn the ignition to the "ON" position (do not start) and check the pressure; it should match manufacturer specifications.
  • If pressure is low, test the fuel pump and replace the fuel filter if clogged.
• Tools Required: Fuel pressure gauge, socket set

5. Clean Throttle Body

• Sub-steps:
  • Remove the air intake duct to access the throttle body.
  • Spray throttle body cleaner inside the throttle body and use a soft cloth to wipe away carbon buildup.
  • Reinstall the air intake duct securely.
• Tools Required: Throttle body cleaner, soft cloth, screwdriver

6. Inspect Intake Manifold

• Sub-steps:
  • Remove the engine cover if applicable.
  • Visually inspect the intake manifold for cracks or loose gaskets.
  • Replace any faulty gaskets or the manifold if necessary.
• Tools Required: Torque wrench, gasket scraper, replacement gaskets