FAULTBASE
Error CodesASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Ram/1500/DT (2019-Present)/how to fix P0174 code in my Ram 1500 DT (2019-Present)

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

Ram 1500 DT (2019-Present)

Error Codes
Severity: highDifficulty: mediumError Code: P01742-4 hours
3 min read
535 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

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

Error Code
P0174
Affected Component
Engine
Estimated Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before opening any components.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or stalling
  • •Decreased fuel efficiency
  • •Hesitation during acceleration
  • •Increased emissions

Diagnostic Steps

  1. 1Scan the vehicle with an OBD-II scanner to confirm the P0174 code and check for any additional codes.
  2. 2Inspect the air intake system for leaks, including the intake manifold, throttle body, and vacuum hoses.
  3. 3Check the fuel system, including fuel pressure and the condition of the fuel filter.
  4. 4Inspect the Mass Air Flow (MAF) sensor for dirt or damage; clean or replace as necessary.
  5. 5Examine the oxygen sensors for proper function and any signs of damage or contamination.
  6. 6Verify that the engine is not experiencing any mechanical issues such as low compression.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the negative battery terminal to prevent electrical shorts.
  • Allow the engine to cool before working on it.

2. Inspect and Repair Air Intake System

  • Sub-steps:
    1. Visually inspect the air intake hoses and connections for any cracks or loose fittings.
    2. Tighten any loose clamps and replace damaged hoses.
    3. Use a smoke machine to detect hidden vacuum leaks if necessary.

3. Check Fuel System

  • Sub-steps:
    1. Use a fuel pressure gauge to check fuel pressure at the rail; compare to manufacturer's specifications.
    2. Replace the fuel filter if it is clogged.
    3. If pressure is low, inspect the fuel pump and fuel injectors for proper operation.

4. Clean or Replace MAF Sensor

  • Sub-steps:
    1. Disconnect the MAF sensor wiring harness and remove the sensor from the air intake.
    2. Clean the sensor with MAF sensor cleaner; avoid touching the sensor element.
    3. If cleaning does not resolve the issue, replace the MAF sensor with a new one.

5. Inspect and Test Oxygen Sensors

  • Sub-steps:
    1. Locate the upstream oxygen sensor and inspect the wiring for damage.
    2. Use a multimeter to test the sensor's voltage output while the engine is running.
    3. Replace any faulty oxygen sensors as needed.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II scanner
  • •Fuel pressure gauge
  • •Multimeter
  • •Socket set
  • •Torque wrench
  • •MAF sensor cleaner

Parts Required

  • •Fuel filter
  • •MAF sensor (if needed)
  • •Oxygen sensor (if needed)
  • •Vacuum hoses (if damaged)

Additional Information

Error Code
P0174
Affected Component
Engine
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
6 items
Parts Required
4 items

Related Faults

  1. how to fix P0420 code in my Ram 1500 DT (2019-Present)

    Learn how to diagnose and fix P0420 catalytic converter issue in Ram 1500 DT. Step-by-step guide with diagnostic procedures and repair instructions.

    P0420Exhaust System5 symptoms
  2. why is my Ram 1500 DT (2019-Present) battery draining overnight

    Learn how to diagnose and fix battery drain issues in Ram 1500 DT (2019-Present). Step-by-step guide with diagnostic procedures and repair instructions.

    Electrical5 symptoms
  3. my Ram 1500 DT (2019-Present) makes rattling noises when idling what is it

    Learn how to diagnose and fix rattling noises when idling in Ram 1500 DT (2019-Present). Step-by-step guide with diagnostic procedures and repair instructions.

    Engine5 symptoms
  4. why does my Ram 1500 DT (2019-Present) make a hissing sound when accelerating

    Learn how to diagnose and fix the hissing sound during acceleration in Ram 1500 DT (2019-Present). Step-by-step guide with diagnostic procedures and repair instructions.

    Engine5 symptoms
  5. how can I tell if my Ram 1500 DT (2019-Present) brake caliper is stuck?

    Learn how to diagnose and fix a stuck brake caliper on your Ram 1500 DT (2019-Present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

    Brakes6 symptoms
  6. why does my Ram 1500 DT (2019-Present) shake when I accelerate

    Learn how to diagnose and fix shaking during acceleration in Ram 1500 DT (2019-present). Step-by-step guide with diagnostic procedures and repair instructions.

    Suspension5 symptoms

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation