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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool before working on any components.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all air intake hoses for cracks or disconnections.
  2. If a leak is found, replace the damaged hose or secure any loose connections.
  3. Clean the MAF sensor using MAF cleaner spray if it appears dirty.

3. Check and Replace Fuel Filter

• Sub-steps:
  1. Locate the fuel filter and check its condition.
  2. If clogged, remove the old filter using a socket set.
  3. Install a new fuel filter, ensuring all connections are secure.

4. Test and Replace Oxygen Sensors

• Sub-steps:
  1. Use a multimeter to check the output voltage of the upstream oxygen sensor.
  2. If the readings are outside of the normal range, disconnect the sensor.
  3. Replace with a new oxygen sensor and reconnect the harness.

5. Reset the ECM

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0171 code from the ECM.