AutoCodes – Hyundai – P1124 Hyundai

P1124 Hyundai Code - Long Term Fuel Trim Error System Lean

Quick Answer

P1124 Hyundai indicates Long Term Fuel Trim Error System Lean. Common causes include Low fuel pressure, Fuel filter plugged, Faulty fuel pump. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1124 Hyundai indicates Long Term Fuel Trim Error System Lean.
Common causes
Common causes include Low fuel pressure, Fuel filter plugged, Faulty fuel pump.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 19,311
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 26, 2019
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Code P1124 Hyundai Description

OBDII Code P1124 Hyundai - Long Term Fuel Trim Error System Lean - AutoCodes.com
P1124 Hyundai Code - Long Term Fuel Trim Error System Lean

What are the Possible Causes of the DTC P1124 Hyundai?

  • Low fuel pressure
  • Fuel filter plugged
  • Faulty fuel pump
  • Engine mechanical condition
  • Large vacuum leak

How to Fix the DTC P1124 Hyundai?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1124 Hyundai code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1124 Hyundai code?

Need more information on how to fix the P1124 Hyundai code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1124 Hyundai code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1124 Hyundai Code

1. What are the common symptoms of OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean)?

- Common symptoms include rough idling, decreased fuel efficiency, engine hesitation, and possible stalling.

2. What are the typical causes of OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean)?

- Causes may include a vacuum leak, faulty oxygen sensor, dirty fuel injectors, or a malfunctioning mass airflow sensor.

3. How can I diagnose the OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean)?

- Diagnose the code by performing a visual inspection for leaks, checking the oxygen sensor readings, testing the mass airflow sensor, and examining the fuel injectors.

4. Can a dirty air filter trigger the OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean)?

- Yes, a dirty air filter can disrupt the air-fuel mixture ratio, leading to a lean condition and triggering the code P1124.

5. What are some repair tips for addressing OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean)?

- Repair tips include replacing the oxygen sensor, cleaning or replacing the mass airflow sensor, checking for vacuum leaks, and ensuring proper fuel injector function.

6. Is it safe to continue driving with OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean) present?

- It is not recommended to continue driving with this code active, as it can lead to poor engine performance and potential long-term damage.

7. Can a bad fuel pump cause OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean)?

- While a bad fuel pump is not a common cause of this specific code, it can impact fuel delivery and contribute to a lean fuel mixture condition.

8. How can I reset the OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean) after making repairs?

- The code can typically be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.

9. Will OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean) cause the check engine light to illuminate?

- Yes, this code will trigger the check engine light to illuminate on the vehicle's dashboard to indicate a potential issue with the fuel trim system.

10. Can a clogged catalytic converter result in OBDII code P1124 Hyundai (Long Term Fuel Trim Error System Lean)?

- A clogged catalytic converter can disrupt exhaust flow and lead to improper fuel trim levels, potentially triggering this lean condition code.

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