FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Genesis/G70/IG (2017-2023)/how to fix P0171 code in Genesis G70 IG (2017-2023)?

how to fix P0171 code in Genesis G70 IG (2017-2023)?

Genesis G70 IG (2017-2023)

Severity: mediumDifficulty: mediumError Code: P01712-4 hours
4 min read
623 words

Problem Statement

Learn how to diagnose and fix P0171 fuel system issue in Genesis G70 IG (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0171
Component
Fuel System
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool down before inspecting components to prevent burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or stalling
  • •Decreased engine power
  • •Poor fuel economy
  • •Increased emissions
  • •Whistling or hissing sounds from the engine bay

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm the P0171 code.
  2. 2Inspect the air intake system for any leaks, cracks, or disconnected hoses.
  3. 3Check the condition and functionality of the mass air flow (MAF) sensor.
  4. 4Examine fuel pressure to ensure the fuel pump and filter are functioning properly.
  5. 5Inspect the fuel injectors for clogs or leaks.
  6. 6Check for vacuum leaks around the intake manifold and vacuum hoses.

Solution

Solution

1. Preparation

  • Gather tools and parts required.
  • Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

  • Tools Required: Socket set, screwdrivers, vacuum gauge.
  • Inspect the entire air intake system for any leaks or damage.
  • Tighten or replace any loose or damaged clamps and hoses.
  • If cracks are found, replace the intake duct or hoses as necessary.

3. Clean or Replace MAF Sensor

  • Tools Required: MAF sensor cleaner or isopropyl alcohol, soft cloth.
  • Disconnect the MAF sensor electrical connector.
  • Remove the MAF sensor from the air intake assembly.
  • Clean the sensor using MAF sensor cleaner and allow it to dry completely.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

  • Tools Required: Fuel pressure gauge.
  • Locate the fuel pressure test port on the fuel rail.
  • Connect the fuel pressure gauge to the test port.
  • Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure reading. It should match the manufacturer's specifications.
  • If the pressure is low, consider replacing the fuel pump or fuel filter.

5. Inspect Fuel Injectors

  • Tools Required: Fuel injector cleaning kit or replacement injectors.
  • If fuel pressure is adequate, check fuel injectors for clogs or leaks.
  • Use a fuel injector cleaner to clean them if necessary, or replace them if they are faulty.

6. Reassemble and Test

  • Reassemble any components that were removed during inspection and repair.
  • Reconnect the battery.
  • Clear the P0171 code using the OBD-II scanner and perform a test drive to ensure the issue is resolved.

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
  • Socket set
  • Screwdrivers
  • Vacuum gauge
  • Fuel pressure gauge
  • MAF sensor cleaner

Parts Required

  • Intake hoses (if damaged)
  • MAF sensor (if faulty)
  • Fuel pump (if needed)
  • Fuel filter (if needed)
  • Fuel injectors (if clogged or leaking)

Additional Information

Error CodeP0171
Component

Fuel System

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

6 items

Parts

5 items

Related Faults

Discover similar issues

  1. my Genesis G70 has an oil leak, how to identify the source

    Learn how to identify and fix oil leaks in your Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Engine
    Symptoms
    • •Visible oil spots under the vehicle when parked
    • •Engine oil level dropping below the recommended level
    • +{count} more
  2. why does my Genesis G70 have a strange smell coming from the vents?

    Learn how to diagnose and fix strange smells from the vents in your Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions...

    Component:HVAC
    Symptoms
    • •Unpleasant odor from the air conditioning vents
    • •Possible musty or moldy smell
    • +{count} more
  3. why does my Genesis G70 engine light come on after oil change

    Learn why the check engine light comes on after an oil change in Genesis G70. Follow our diagnostic steps and solutions to resolve the issue.

    Component:Engine
    Symptoms
    • •Check engine light illuminated
    • •Possible oil leak under the vehicle
    • +{count} more
  4. why does my Genesis G70 stall while driving

    Learn how to diagnose and fix stalling issues in Genesis G70. Step-by-step guide with symptoms, diagnostic steps, tools, and repair instructions.

    Component:Engine
    Symptoms
    • •Engine stalls unexpectedly during driving
    • •Difficulty restarting the engine after stalling
    • +{count} more
  5. why does my Genesis G70 feel like it's pulling to one side

    Learn how to diagnose and fix pulling issues in your Genesis G70. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

    Component:Suspension
    Symptoms
    • •Vehicle pulls to the left or right when driving straight
    • •Uneven tire wear observed on one side
    • +{count} more
  6. why does my Genesis G70 transmission slip when shifting

    Learn how to diagnose and fix transmission slipping in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Transmission
    Symptoms
    • •Transmission slips during gear changes
    • •Delayed engagement when shifting from park to drive/reverse
    • +{count} more

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