how to fix P0174 code in Ram 1500 DT (2019-Present)

Learn how to diagnose and fix P0174 engine lean condition in Ram 1500 DT (2019-present). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery negative terminal to ensure safety while working on electrical components.

2. Inspect and Repair Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Check all vacuum hoses for cracks or disconnections. Replace any damaged hoses.
• Inspect the intake manifold gaskets for leaks and replace if necessary.
• Tighten any loose clamps or fittings on the air intake system.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner (specific for automotive use), Torx or socket set.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with the cleaner and allow it to dry completely before reinstalling.
• If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail and connect the fuel pressure gauge.
• Turn the ignition key to the "on" position (do not start the engine) to prime the fuel system and check the pressure reading.
• If the fuel pressure is below the manufacturer's specifications, replace the fuel pump as needed.

5. Replace Intake Manifold Gasket (if applicable)

• Tools Required: Gasket scraper, torque wrench, socket set.
• Remove the intake manifold by disconnecting all necessary components and bolts.
• Clean the mating surfaces thoroughly to remove old gasket material.
• Install a new intake manifold gasket and reassemble the manifold, following the specified torque sequence and values.