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

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Step 1: Remove the air intake duct. Use a socket set to loosen the clamps.
• Step 2: Inspect the duct for cracks or leaks. Replace any damaged sections.
• Step 3: Reinstall the air intake duct and secure with clamps.

3. Clean or Replace MAF Sensor

• Step 1: Locate the MAF sensor, typically found between the air filter and the throttle body.
• Step 2: Disconnect the electrical connector from the MAF sensor.
• Step 3: Remove the MAF sensor using a Torx screwdriver.
• Step 4: Clean the sensor using MAF cleaner spray. Allow it to dry completely.
• Step 5: Reinstall the MAF sensor and reconnect the electrical connector.

4. Inspect Fuel System

• Step 1: Use a fuel pressure gauge to check the fuel pressure at the rail. Compare with manufacturer specifications (usually around 58-62 psi for Ram 1500).
• Step 2: If pressure is low, check the fuel pump operation and replace if necessary.
• Step 3: Inspect and replace the fuel filter if it is clogged.

5. Check Vacuum Lines

• Step 1: Visually inspect all vacuum lines for damage or disconnection.
• Step 2: Replace any damaged or cracked vacuum lines.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code from the system.