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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, pliers, vacuum gauge.
• Instructions:
  1. Visually inspect the air intake hoses and connections for signs of wear or leaks.
  2. Use a vacuum gauge to test for leaks in the vacuum lines.
  3. Replace any damaged hoses or connections as needed.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver.
• Instructions:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using the screwdriver.
  3. Clean the sensor with MAF sensor cleaner; do not touch the sensing elements.
  4. Reinstall the sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Instructions:
  1. Locate the fuel rail test port and remove the cap.
  2. Attach the fuel pressure gauge to the test port.
  3. Turn the ignition to the "ON" position (do not start) and note the pressure reading; it should match manufacturer specifications.
  4. If pressure is low, check the fuel pump and filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Multimeter, fuel injector cleaner.
• Instructions:
  1. Disconnect the fuel injectors from the wiring harness.
  2. Use a multimeter to check the injector resistance; compare with specifications.
  3. If injectors are clogged, use a fuel injector cleaner to clean them or replace them if necessary.