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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect and Repair the Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Inspect all intake hoses for cracks or loose connections. Tighten or replace as necessary.
• If any leaks are found, repair or replace the affected hose or connector.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF sensor cleaner, soft cloth
• Remove the MAF sensor using a socket set.
• Clean the sensor using MAF sensor cleaner, ensuring not to touch the sensing elements.
• Reinstall the MAF sensor and ensure all connections are secure.

4. Check and Repair the Fuel System

• Tools Required: Fuel pressure gauge, socket set
• Connect a fuel pressure gauge to the fuel rail and check the pressure against manufacturer specifications.
• If the pressure is low, inspect and replace the fuel filter and check the fuel pump for proper operation.
• If injectors are suspected, remove them and inspect for clogs. Clean or replace as necessary.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine, or carburetor cleaner
• Use a smoke machine to introduce smoke into the intake system and look for leaks.
• If no smoke machine is available, spray carburetor cleaner around suspected areas and listen for changes in engine idle.
• Repair any leaks found in hoses or the intake manifold.