AutoCodes – Hyundai – P1140 Hyundai

P1140 Hyundai Code - Inlet Air Temperature Sensor Malfunction

Quick Answer

P1140 Hyundai indicates Inlet Air Temperature Sensor Malfunction. Common causes for P1140 Hyundai include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues. 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: P1140 Hyundai indicates Inlet Air Temperature Sensor Malfunction.
Common causes: Common causes for P1140 Hyundai include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 9,929

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 30, 2019

Description
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1140 Hyundai Description

OBDII Code P1140 Hyundai - Inlet Air Temperature Sensor Malfunction - AutoCodes.com — P1140 Hyundai Code - Inlet Air Temperature Sensor Malfunction

How to Fix the DTC P1140 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 P1140 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 P1140 Hyundai code?

Need more information on how to fix the P1140 Hyundai code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1140 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 P1140 Hyundai Code

1. What does the OBDII code P1140 mean on a Hyundai?

P1140 indicates an "Inlet Air Temperature Sensor Malfunction," meaning the sensor responsible for measuring the air temperature entering the engine may be faulty or providing incorrect readings.

2. What are the common symptoms of code P1140 on a Hyundai?

Symptoms may include reduced engine performance, poor fuel economy, difficulty starting, and an illuminated Check Engine Light.

3. What causes the P1140 code to appear on a Hyundai?

Common causes include a faulty inlet air temperature sensor, damaged wiring or connectors, or issues with the engine control module (ECM).

4. Can a dirty air filter trigger the P1140 code on a Hyundai?

A dirty air filter is unlikely to directly cause this code, but it can contribute to poor airflow, which may indirectly affect sensor readings.

5. How do you diagnose the P1140 code on a Hyundai?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the inlet air temperature sensor and its wiring, and comparing sensor readings to manufacturer specifications.

6. Can I drive my Hyundai with a P1140 code?

While the vehicle may still be drivable, continuing to drive with this code could lead to reduced performance and potential engine damage over time.

7. How do you fix the P1140 code on a Hyundai?

Repairs may include replacing the inlet air temperature sensor, repairing damaged wiring or connectors, or updating/reprogramming the ECM if needed.

8. How much does it cost to fix the P1140 code on a Hyundai?

The cost can vary, but replacing the inlet air temperature sensor typically ranges from $50 to $200, including parts and labor.

9. Can a P1140 code be cleared without repairs?

Clearing the code without addressing the root cause may result in the code returning. Proper diagnosis and repair are essential.

10. Is the inlet air temperature sensor the same as the mass air flow sensor?

No, the inlet air temperature sensor measures air temperature, while the mass air flow sensor measures the amount of air entering the engine. They are separate components, though they may work together.